IPレンジ
CERNET のIPレンジ一覧
CERNET（AS4538）が現在インターネット上で広報しているIPv4・IPv6のレンジをすべて、CIDRと開始・終了IPで掲載しています。TXT・CSVで無料ダウンロードできます。データのスナップショット日：2026-11-02。
CERNETはAS4538から、3,490件のIPv4プレフィックス（合計17,173,248アドレス）と9件のIPv6プレフィックスを広報しています。以下のリストは2026-11-02に公開BGPルーティングテーブルから取得したスナップショットで、アドレス順に並べ、広報されたままの形で載せています。
ASNAS4538
IPv4プレフィックス数3,490
IPv4アドレス総数17,173,248重なる部分は1回だけ数えています
IPv6プレフィックス数9
データのスナップショット日
全件のリストをダウンロード
全件のリストは3,499件（IPv4とIPv6）です。TXTは1行1CIDR、CSVはcidr・version・start_ip・end_ip・addressesの5列です。
CERNET のIPv4レンジ
| CIDR | 開始IP – 終了IP | アドレス数 |
|---|---|---|
| 1.51.0.0/16 | 1.51.0.0–1.51.255.255 | 65,536 |
| 1.51.3.0/24 | 1.51.3.0–1.51.3.255 | 256 |
| 1.51.112.0/24 | 1.51.112.0–1.51.112.255 | 256 |
| 1.51.120.0/21 | 1.51.120.0–1.51.127.255 | 2,048 |
| 1.51.192.0/18 | 1.51.192.0–1.51.255.255 | 16,384 |
| 1.184.0.0/15 | 1.184.0.0–1.185.255.255 | 131,072 |
| 42.244.0.0/16 | 42.244.0.0–42.244.255.255 | 65,536 |
| 42.244.0.0/18 | 42.244.0.0–42.244.63.255 | 16,384 |
| 42.245.0.0/16 | 42.245.0.0–42.245.255.255 | 65,536 |
| 42.246.0.0/15 | 42.246.0.0–42.247.255.255 | 131,072 |
| 42.247.8.0/24 | 42.247.8.0–42.247.8.255 | 256 |
| 42.247.9.0/24 | 42.247.9.0–42.247.9.255 | 256 |
| 42.247.13.0/24 | 42.247.13.0–42.247.13.255 | 256 |
| 42.247.18.0/24 | 42.247.18.0–42.247.18.255 | 256 |
| 42.247.20.0/24 | 42.247.20.0–42.247.20.255 | 256 |
| 42.247.30.0/24 | 42.247.30.0–42.247.30.255 | 256 |
| 42.247.53.0/24 | 42.247.53.0–42.247.53.255 | 256 |
| 42.247.58.0/24 | 42.247.58.0–42.247.58.255 | 256 |
| 42.247.103.0/24 | 42.247.103.0–42.247.103.255 | 256 |
| 42.247.107.0/24 | 42.247.107.0–42.247.107.255 | 256 |
| 42.247.113.0/24 | 42.247.113.0–42.247.113.255 | 256 |
| 49.52.0.0/14 | 49.52.0.0–49.55.255.255 | 262,144 |
| 49.52.0.0/15 | 49.52.0.0–49.53.255.255 | 131,072 |
| 49.52.48.0/24 | 49.52.48.0–49.52.48.255 | 256 |
| 49.120.0.0/14 | 49.120.0.0–49.123.255.255 | 262,144 |
| 49.120.64.0/19 | 49.120.64.0–49.120.95.255 | 8,192 |
| 49.122.0.0/20 | 49.122.0.0–49.122.15.255 | 4,096 |
| 49.122.16.0/21 | 49.122.16.0–49.122.23.255 | 2,048 |
| 49.122.24.0/21 | 49.122.24.0–49.122.31.255 | 2,048 |
| 49.122.32.0/20 | 49.122.32.0–49.122.47.255 | 4,096 |
| 49.122.64.0/22 | 49.122.64.0–49.122.67.255 | 1,024 |
| 49.122.128.0/18 | 49.122.128.0–49.122.191.255 | 16,384 |
| 49.122.191.0/24 | 49.122.191.0–49.122.191.255 | 256 |
| 49.123.0.0/20 | 49.123.0.0–49.123.15.255 | 4,096 |
| 49.123.16.0/21 | 49.123.16.0–49.123.23.255 | 2,048 |
| 49.123.64.0/18 | 49.123.64.0–49.123.127.255 | 16,384 |
| 49.140.0.0/15 | 49.140.0.0–49.141.255.255 | 131,072 |
| 49.140.0.0/16 | 49.140.0.0–49.140.255.255 | 65,536 |
| 49.141.0.0/20 | 49.141.0.0–49.141.15.255 | 4,096 |
| 49.141.16.0/21 | 49.141.16.0–49.141.23.255 | 2,048 |
| 49.141.24.0/21 | 49.141.24.0–49.141.31.255 | 2,048 |
| 49.141.32.0/20 | 49.141.32.0–49.141.47.255 | 4,096 |
| 49.141.64.0/18 | 49.141.64.0–49.141.127.255 | 16,384 |
| 49.141.128.0/20 | 49.141.128.0–49.141.143.255 | 4,096 |
| 49.141.144.0/21 | 49.141.144.0–49.141.151.255 | 2,048 |
| 49.141.192.0/20 | 49.141.192.0–49.141.207.255 | 4,096 |
| 49.141.210.0/24 | 49.141.210.0–49.141.210.255 | 256 |
| 49.208.0.0/15 | 49.208.0.0–49.209.255.255 | 131,072 |
| 49.208.0.0/17 | 49.208.0.0–49.208.127.255 | 32,768 |
| 49.209.0.0/20 | 49.209.0.0–49.209.15.255 | 4,096 |
| 49.209.16.0/20 | 49.209.16.0–49.209.31.255 | 4,096 |
| 49.209.32.0/19 | 49.209.32.0–49.209.63.255 | 8,192 |
| 49.209.64.0/18 | 49.209.64.0–49.209.127.255 | 16,384 |
| 49.209.232.0/21 | 49.209.232.0–49.209.239.255 | 2,048 |
| 49.209.240.0/20 | 49.209.240.0–49.209.255.255 | 4,096 |
| 58.154.0.0/15 | 58.154.0.0–58.155.255.255 | 131,072 |
| 58.154.0.0/20 | 58.154.0.0–58.154.15.255 | 4,096 |
| 58.154.32.0/23 | 58.154.32.0–58.154.33.255 | 512 |
| 58.154.34.0/24 | 58.154.34.0–58.154.34.255 | 256 |
| 58.154.37.0/24 | 58.154.37.0–58.154.37.255 | 256 |
| 58.154.48.0/20 | 58.154.48.0–58.154.63.255 | 4,096 |
| 58.154.96.0/20 | 58.154.96.0–58.154.111.255 | 4,096 |
| 58.154.128.0/20 | 58.154.128.0–58.154.143.255 | 4,096 |
| 58.154.144.0/20 | 58.154.144.0–58.154.159.255 | 4,096 |
| 58.154.160.0/19 | 58.154.160.0–58.154.191.255 | 8,192 |
| 58.154.192.0/19 | 58.154.192.0–58.154.223.255 | 8,192 |
| 58.154.224.0/20 | 58.154.224.0–58.154.239.255 | 4,096 |
| 58.154.240.0/20 | 58.154.240.0–58.154.255.255 | 4,096 |
| 58.155.0.0/16 | 58.155.0.0–58.155.255.255 | 65,536 |
| 58.155.0.0/20 | 58.155.0.0–58.155.15.255 | 4,096 |
| 58.155.16.0/21 | 58.155.16.0–58.155.23.255 | 2,048 |
| 58.155.24.0/21 | 58.155.24.0–58.155.31.255 | 2,048 |
| 58.155.32.0/20 | 58.155.32.0–58.155.47.255 | 4,096 |
| 58.155.48.0/20 | 58.155.48.0–58.155.63.255 | 4,096 |
| 58.155.50.0/24 | 58.155.50.0–58.155.50.255 | 256 |
| 58.155.51.0/24 | 58.155.51.0–58.155.51.255 | 256 |
| 58.155.53.0/24 | 58.155.53.0–58.155.53.255 | 256 |
| 58.155.62.0/24 | 58.155.62.0–58.155.62.255 | 256 |
| 58.155.63.0/24 | 58.155.63.0–58.155.63.255 | 256 |
| 58.155.71.0/24 | 58.155.71.0–58.155.71.255 | 256 |
| 58.155.96.0/20 | 58.155.96.0–58.155.111.255 | 4,096 |
| 58.155.124.0/22 | 58.155.124.0–58.155.127.255 | 1,024 |
| 58.155.128.0/23 | 58.155.128.0–58.155.129.255 | 512 |
| 58.155.130.0/23 | 58.155.130.0–58.155.131.255 | 512 |
| 58.155.132.0/23 | 58.155.132.0–58.155.133.255 | 512 |
| 58.155.134.0/23 | 58.155.134.0–58.155.135.255 | 512 |
| 58.155.136.0/23 | 58.155.136.0–58.155.137.255 | 512 |
| 58.155.144.0/22 | 58.155.144.0–58.155.147.255 | 1,024 |
| 58.155.156.0/22 | 58.155.156.0–58.155.159.255 | 1,024 |
| 58.155.160.0/21 | 58.155.160.0–58.155.167.255 | 2,048 |
| 58.155.168.0/22 | 58.155.168.0–58.155.171.255 | 1,024 |
| 58.155.172.0/22 | 58.155.172.0–58.155.175.255 | 1,024 |
| 58.155.176.0/20 | 58.155.176.0–58.155.191.255 | 4,096 |
| 58.155.192.0/20 | 58.155.192.0–58.155.207.255 | 4,096 |
| 58.155.208.0/20 | 58.155.208.0–58.155.223.255 | 4,096 |
| 58.155.224.0/20 | 58.155.224.0–58.155.239.255 | 4,096 |
| 58.155.240.0/20 | 58.155.240.0–58.155.255.255 | 4,096 |
| 58.192.0.0/12 | 58.192.0.0–58.207.255.255 | 1,048,576 |
| 58.192.0.0/15 | 58.192.0.0–58.193.255.255 | 131,072 |
| 58.194.8.0/23 | 58.194.8.0–58.194.9.255 | 512 |
| 58.194.24.0/21 | 58.194.24.0–58.194.31.255 | 2,048 |
| 58.194.32.0/19 | 58.194.32.0–58.194.63.255 | 8,192 |
| 58.194.120.0/21 | 58.194.120.0–58.194.127.255 | 2,048 |
| 58.194.160.0/19 | 58.194.160.0–58.194.191.255 | 8,192 |
| 58.194.232.0/21 | 58.194.232.0–58.194.239.255 | 2,048 |
| 58.194.240.0/20 | 58.194.240.0–58.194.255.255 | 4,096 |
| 58.195.96.0/23 | 58.195.96.0–58.195.97.255 | 512 |
| 58.195.136.0/21 | 58.195.136.0–58.195.143.255 | 2,048 |
| 58.195.144.0/20 | 58.195.144.0–58.195.159.255 | 4,096 |
| 58.196.0.0/15 | 58.196.0.0–58.197.255.255 | 131,072 |
| 58.196.128.0/19 | 58.196.128.0–58.196.159.255 | 8,192 |
| 58.196.160.0/20 | 58.196.160.0–58.196.175.255 | 4,096 |
| 58.196.176.0/24 | 58.196.176.0–58.196.176.255 | 256 |
| 58.196.177.0/24 | 58.196.177.0–58.196.177.255 | 256 |
| 58.196.178.0/24 | 58.196.178.0–58.196.178.255 | 256 |
| 58.198.0.0/15 | 58.198.0.0–58.199.255.255 | 131,072 |
| 58.200.0.0/13 | 58.200.0.0–58.207.255.255 | 524,288 |
| 58.200.0.0/19 | 58.200.0.0–58.200.31.255 | 8,192 |
| 58.200.2.0/24 | 58.200.2.0–58.200.2.255 | 256 |
| 58.200.4.0/24 | 58.200.4.0–58.200.4.255 | 256 |
| 58.200.6.0/24 | 58.200.6.0–58.200.6.255 | 256 |
| 58.200.8.0/24 | 58.200.8.0–58.200.8.255 | 256 |
| 58.200.9.0/24 | 58.200.9.0–58.200.9.255 | 256 |
| 58.200.10.0/24 | 58.200.10.0–58.200.10.255 | 256 |
| 58.200.12.0/24 | 58.200.12.0–58.200.12.255 | 256 |
| 58.200.13.0/24 | 58.200.13.0–58.200.13.255 | 256 |
| 58.200.16.0/24 | 58.200.16.0–58.200.16.255 | 256 |
| 58.200.17.0/24 | 58.200.17.0–58.200.17.255 | 256 |
| 58.200.21.0/24 | 58.200.21.0–58.200.21.255 | 256 |
| 58.200.22.0/24 | 58.200.22.0–58.200.22.255 | 256 |
| 58.200.24.0/24 | 58.200.24.0–58.200.24.255 | 256 |
| 58.200.25.0/24 | 58.200.25.0–58.200.25.255 | 256 |
| 58.200.26.0/24 | 58.200.26.0–58.200.26.255 | 256 |
| 58.200.27.0/24 | 58.200.27.0–58.200.27.255 | 256 |
| 58.200.64.0/18 | 58.200.64.0–58.200.127.255 | 16,384 |
| 58.200.68.0/24 | 58.200.68.0–58.200.68.255 | 256 |
| 58.200.71.0/24 | 58.200.71.0–58.200.71.255 | 256 |
| 58.200.72.0/24 | 58.200.72.0–58.200.72.255 | 256 |
| 58.200.75.0/24 | 58.200.75.0–58.200.75.255 | 256 |
| 58.200.77.0/24 | 58.200.77.0–58.200.77.255 | 256 |
| 58.200.87.0/24 | 58.200.87.0–58.200.87.255 | 256 |
| 58.200.88.0/24 | 58.200.88.0–58.200.88.255 | 256 |
| 58.200.91.0/24 | 58.200.91.0–58.200.91.255 | 256 |
| 58.200.93.0/24 | 58.200.93.0–58.200.93.255 | 256 |
| 58.200.95.0/24 | 58.200.95.0–58.200.95.255 | 256 |
| 58.200.97.0/24 | 58.200.97.0–58.200.97.255 | 256 |
| 58.200.102.0/23 | 58.200.102.0–58.200.103.255 | 512 |
| 58.200.111.0/24 | 58.200.111.0–58.200.111.255 | 256 |
| 58.200.112.0/24 | 58.200.112.0–58.200.112.255 | 256 |
| 58.200.114.0/24 | 58.200.114.0–58.200.114.255 | 256 |
| 58.200.117.0/24 | 58.200.117.0–58.200.117.255 | 256 |
| 58.200.119.0/24 | 58.200.119.0–58.200.119.255 | 256 |
| 58.200.121.0/24 | 58.200.121.0–58.200.121.255 | 256 |
| 58.200.125.0/24 | 58.200.125.0–58.200.125.255 | 256 |
| 58.200.127.0/24 | 58.200.127.0–58.200.127.255 | 256 |
| 58.200.128.0/17 | 58.200.128.0–58.200.255.255 | 32,768 |
| 58.200.141.0/24 | 58.200.141.0–58.200.141.255 | 256 |
| 58.200.216.0/22 | 58.200.216.0–58.200.219.255 | 1,024 |
| 58.200.216.0/23 | 58.200.216.0–58.200.217.255 | 512 |
| 58.200.218.0/23 | 58.200.218.0–58.200.219.255 | 512 |
| 58.200.253.0/24 | 58.200.253.0–58.200.253.255 | 256 |
| 58.205.197.0/24 | 58.205.197.0–58.205.197.255 | 256 |
| 58.205.213.0/24 | 58.205.213.0–58.205.213.255 | 256 |
| 58.206.0.0/19 | 58.206.0.0–58.206.31.255 | 8,192 |
| 58.206.96.0/19 | 58.206.96.0–58.206.127.255 | 8,192 |
| 58.206.129.0/24 | 58.206.129.0–58.206.129.255 | 256 |
| 58.206.132.0/24 | 58.206.132.0–58.206.132.255 | 256 |
| 58.206.134.0/24 | 58.206.134.0–58.206.134.255 | 256 |
| 58.206.135.0/24 | 58.206.135.0–58.206.135.255 | 256 |
| 58.206.160.0/19 | 58.206.160.0–58.206.191.255 | 8,192 |
| 58.206.192.0/18 | 58.206.192.0–58.206.255.255 | 16,384 |
| 58.207.0.0/16 | 58.207.0.0–58.207.255.255 | 65,536 |
| 58.207.0.0/17 | 58.207.0.0–58.207.127.255 | 32,768 |
| 58.207.8.0/21 | 58.207.8.0–58.207.15.255 | 2,048 |
| 58.207.16.0/20 | 58.207.16.0–58.207.31.255 | 4,096 |
| 58.207.64.0/18 | 58.207.64.0–58.207.127.255 | 16,384 |
| 58.207.128.0/17 | 58.207.128.0–58.207.255.255 | 32,768 |
| 58.207.254.0/24 | 58.207.254.0–58.207.254.255 | 256 |
| 58.207.255.0/24 | 58.207.255.0–58.207.255.255 | 256 |
| 59.64.0.0/12 | 59.64.0.0–59.79.255.255 | 1,048,576 |
| 59.64.0.0/14 | 59.64.0.0–59.67.255.255 | 262,144 |
| 59.64.0.0/20 | 59.64.0.0–59.64.15.255 | 4,096 |
| 59.64.16.0/24 | 59.64.16.0–59.64.16.255 | 256 |
| 59.64.24.0/21 | 59.64.24.0–59.64.31.255 | 2,048 |
| 59.64.32.0/19 | 59.64.32.0–59.64.63.255 | 8,192 |
| 59.64.64.0/20 | 59.64.64.0–59.64.79.255 | 4,096 |
| 59.64.80.0/20 | 59.64.80.0–59.64.95.255 | 4,096 |
| 59.64.96.0/20 | 59.64.96.0–59.64.111.255 | 4,096 |
| 59.64.120.0/22 | 59.64.120.0–59.64.123.255 | 1,024 |
| 59.64.124.0/22 | 59.64.124.0–59.64.127.255 | 1,024 |
| 59.64.124.0/24 | 59.64.124.0–59.64.124.255 | 256 |
| 59.64.125.0/24 | 59.64.125.0–59.64.125.255 | 256 |
| 59.64.126.0/24 | 59.64.126.0–59.64.126.255 | 256 |
| 59.64.128.0/17 | 59.64.128.0–59.64.255.255 | 32,768 |
| 59.65.0.0/19 | 59.65.0.0–59.65.31.255 | 8,192 |
| 59.65.32.0/19 | 59.65.32.0–59.65.63.255 | 8,192 |
| 59.65.64.0/19 | 59.65.64.0–59.65.95.255 | 8,192 |
| 59.65.96.0/20 | 59.65.96.0–59.65.111.255 | 4,096 |
| 59.65.112.0/20 | 59.65.112.0–59.65.127.255 | 4,096 |
| 59.65.128.0/20 | 59.65.128.0–59.65.143.255 | 4,096 |
| 59.65.144.0/20 | 59.65.144.0–59.65.159.255 | 4,096 |
| 59.65.160.0/19 | 59.65.160.0–59.65.191.255 | 8,192 |
| 59.65.196.0/22 | 59.65.196.0–59.65.199.255 | 1,024 |
| 59.65.224.0/20 | 59.65.224.0–59.65.239.255 | 4,096 |
| 59.65.248.0/21 | 59.65.248.0–59.65.255.255 | 2,048 |
| 59.66.0.0/16 | 59.66.0.0–59.66.255.255 | 65,536 |
| 59.66.0.0/17 | 59.66.0.0–59.66.127.255 | 32,768 |
| 59.66.0.0/18 | 59.66.0.0–59.66.63.255 | 16,384 |
| 59.66.64.0/18 | 59.66.64.0–59.66.127.255 | 16,384 |
| 59.66.128.0/17 | 59.66.128.0–59.66.255.255 | 32,768 |
| 59.66.128.0/18 | 59.66.128.0–59.66.191.255 | 16,384 |
| 59.66.192.0/18 | 59.66.192.0–59.66.255.255 | 16,384 |
| 59.67.0.0/19 | 59.67.0.0–59.67.31.255 | 8,192 |
| 59.67.0.0/21 | 59.67.0.0–59.67.7.255 | 2,048 |
| 59.67.32.0/20 | 59.67.32.0–59.67.47.255 | 4,096 |
| 59.67.48.0/21 | 59.67.48.0–59.67.55.255 | 2,048 |
| 59.67.64.0/19 | 59.67.64.0–59.67.95.255 | 8,192 |
| 59.67.96.0/20 | 59.67.96.0–59.67.111.255 | 4,096 |
| 59.67.112.0/20 | 59.67.112.0–59.67.127.255 | 4,096 |
| 59.67.128.0/20 | 59.67.128.0–59.67.143.255 | 4,096 |
| 59.67.133.0/24 | 59.67.133.0–59.67.133.255 | 256 |
| 59.67.144.0/20 | 59.67.144.0–59.67.159.255 | 4,096 |
| 59.67.164.0/22 | 59.67.164.0–59.67.167.255 | 1,024 |
| 59.67.168.0/21 | 59.67.168.0–59.67.175.255 | 2,048 |
| 59.67.180.0/22 | 59.67.180.0–59.67.183.255 | 1,024 |
| 59.67.192.0/24 | 59.67.192.0–59.67.192.255 | 256 |
| 59.67.193.0/24 | 59.67.193.0–59.67.193.255 | 256 |
| 59.67.194.0/23 | 59.67.194.0–59.67.195.255 | 512 |
| 59.67.200.0/23 | 59.67.200.0–59.67.201.255 | 512 |
| 59.67.202.0/23 | 59.67.202.0–59.67.203.255 | 512 |
| 59.67.204.0/23 | 59.67.204.0–59.67.205.255 | 512 |
| 59.67.206.0/23 | 59.67.206.0–59.67.207.255 | 512 |
| 59.67.208.0/21 | 59.67.208.0–59.67.215.255 | 2,048 |
| 59.67.216.0/22 | 59.67.216.0–59.67.219.255 | 1,024 |
| 59.67.220.0/23 | 59.67.220.0–59.67.221.255 | 512 |
| 59.67.224.0/20 | 59.67.224.0–59.67.239.255 | 4,096 |
| 59.67.240.0/21 | 59.67.240.0–59.67.247.255 | 2,048 |
| 59.67.248.0/24 | 59.67.248.0–59.67.248.255 | 256 |
| 59.67.249.0/24 | 59.67.249.0–59.67.249.255 | 256 |
| 59.67.250.0/23 | 59.67.250.0–59.67.251.255 | 512 |
| 59.67.252.0/22 | 59.67.252.0–59.67.255.255 | 1,024 |
| 59.68.0.0/18 | 59.68.0.0–59.68.63.255 | 16,384 |
| 59.68.64.0/20 | 59.68.64.0–59.68.79.255 | 4,096 |
| 59.68.80.0/22 | 59.68.80.0–59.68.83.255 | 1,024 |
| 59.68.84.0/22 | 59.68.84.0–59.68.87.255 | 1,024 |
| 59.68.92.0/22 | 59.68.92.0–59.68.95.255 | 1,024 |
| 59.68.96.0/20 | 59.68.96.0–59.68.111.255 | 4,096 |
| 59.68.112.0/23 | 59.68.112.0–59.68.113.255 | 512 |
| 59.68.128.0/19 | 59.68.128.0–59.68.159.255 | 8,192 |
| 59.68.160.0/21 | 59.68.160.0–59.68.167.255 | 2,048 |
| 59.68.176.0/20 | 59.68.176.0–59.68.191.255 | 4,096 |
| 59.68.192.0/22 | 59.68.192.0–59.68.195.255 | 1,024 |
| 59.68.224.0/22 | 59.68.224.0–59.68.227.255 | 1,024 |
| 59.68.228.0/22 | 59.68.228.0–59.68.231.255 | 1,024 |
| 59.68.232.0/23 | 59.68.232.0–59.68.233.255 | 512 |
| 59.68.240.0/20 | 59.68.240.0–59.68.255.255 | 4,096 |
| 59.69.0.0/19 | 59.69.0.0–59.69.31.255 | 8,192 |
| 59.69.32.0/19 | 59.69.32.0–59.69.63.255 | 8,192 |
| 59.69.64.0/18 | 59.69.64.0–59.69.127.255 | 16,384 |
| 59.69.64.0/20 | 59.69.64.0–59.69.79.255 | 4,096 |
| 59.69.80.0/20 | 59.69.80.0–59.69.95.255 | 4,096 |
| 59.69.80.0/21 | 59.69.80.0–59.69.87.255 | 2,048 |
| 59.69.84.0/24 | 59.69.84.0–59.69.84.255 | 256 |
| 59.69.85.0/24 | 59.69.85.0–59.69.85.255 | 256 |
| 59.69.88.0/21 | 59.69.88.0–59.69.95.255 | 2,048 |
| 59.69.96.0/21 | 59.69.96.0–59.69.103.255 | 2,048 |
| 59.69.104.0/21 | 59.69.104.0–59.69.111.255 | 2,048 |
| 59.69.104.0/22 | 59.69.104.0–59.69.107.255 | 1,024 |
| 59.69.108.0/22 | 59.69.108.0–59.69.111.255 | 1,024 |
| 59.69.112.0/20 | 59.69.112.0–59.69.127.255 | 4,096 |
| 59.69.128.0/19 | 59.69.128.0–59.69.159.255 | 8,192 |
| 59.69.160.0/19 | 59.69.160.0–59.69.191.255 | 8,192 |
| 59.69.192.0/20 | 59.69.192.0–59.69.207.255 | 4,096 |
| 59.69.208.0/20 | 59.69.208.0–59.69.223.255 | 4,096 |
| 59.70.8.0/22 | 59.70.8.0–59.70.11.255 | 1,024 |
| 59.70.12.0/24 | 59.70.12.0–59.70.12.255 | 256 |
| 59.70.13.0/24 | 59.70.13.0–59.70.13.255 | 256 |
| 59.70.14.0/24 | 59.70.14.0–59.70.14.255 | 256 |
| 59.70.16.0/20 | 59.70.16.0–59.70.31.255 | 4,096 |
| 59.70.32.0/20 | 59.70.32.0–59.70.47.255 | 4,096 |
| 59.70.36.0/24 | 59.70.36.0–59.70.36.255 | 256 |
| 59.70.48.0/20 | 59.70.48.0–59.70.63.255 | 4,096 |
| 59.70.48.0/24 | 59.70.48.0–59.70.48.255 | 256 |
| 59.70.64.0/19 | 59.70.64.0–59.70.95.255 | 8,192 |
| 59.70.80.0/20 | 59.70.80.0–59.70.95.255 | 4,096 |
| 59.70.96.0/20 | 59.70.96.0–59.70.111.255 | 4,096 |
| 59.70.112.0/20 | 59.70.112.0–59.70.127.255 | 4,096 |
| 59.70.128.0/19 | 59.70.128.0–59.70.159.255 | 8,192 |
| 59.70.135.0/24 | 59.70.135.0–59.70.135.255 | 256 |
| 59.70.160.0/21 | 59.70.160.0–59.70.167.255 | 2,048 |
| 59.70.168.0/21 | 59.70.168.0–59.70.175.255 | 2,048 |
| 59.70.176.0/20 | 59.70.176.0–59.70.191.255 | 4,096 |
| 59.70.192.0/20 | 59.70.192.0–59.70.207.255 | 4,096 |
| 59.70.224.0/19 | 59.70.224.0–59.70.255.255 | 8,192 |
| 59.71.0.0/19 | 59.71.0.0–59.71.31.255 | 8,192 |
| 59.71.32.0/20 | 59.71.32.0–59.71.47.255 | 4,096 |
| 59.71.48.0/22 | 59.71.48.0–59.71.51.255 | 1,024 |
| 59.71.56.0/22 | 59.71.56.0–59.71.59.255 | 1,024 |
| 59.71.62.0/23 | 59.71.62.0–59.71.63.255 | 512 |
| 59.71.64.0/19 | 59.71.64.0–59.71.95.255 | 8,192 |
| 59.71.96.0/23 | 59.71.96.0–59.71.97.255 | 512 |
| 59.71.102.0/23 | 59.71.102.0–59.71.103.255 | 512 |
| 59.71.104.0/23 | 59.71.104.0–59.71.105.255 | 512 |
| 59.71.106.0/23 | 59.71.106.0–59.71.107.255 | 512 |
| 59.71.108.0/23 | 59.71.108.0–59.71.109.255 | 512 |
| 59.71.114.0/23 | 59.71.114.0–59.71.115.255 | 512 |
| 59.71.116.0/23 | 59.71.116.0–59.71.117.255 | 512 |
| 59.71.118.0/23 | 59.71.118.0–59.71.119.255 | 512 |
| 59.71.120.0/23 | 59.71.120.0–59.71.121.255 | 512 |
| 59.71.124.0/23 | 59.71.124.0–59.71.125.255 | 512 |
| 59.71.126.0/23 | 59.71.126.0–59.71.127.255 | 512 |
| 59.71.128.0/17 | 59.71.128.0–59.71.255.255 | 32,768 |
| 59.72.0.0/17 | 59.72.0.0–59.72.127.255 | 32,768 |
| 59.72.128.0/18 | 59.72.128.0–59.72.191.255 | 16,384 |
| 59.72.192.0/19 | 59.72.192.0–59.72.223.255 | 8,192 |
| 59.72.192.0/24 | 59.72.192.0–59.72.192.255 | 256 |
| 59.72.224.0/21 | 59.72.224.0–59.72.231.255 | 2,048 |
| 59.73.16.0/21 | 59.73.16.0–59.73.23.255 | 2,048 |
| 59.73.64.0/18 | 59.73.64.0–59.73.127.255 | 16,384 |
| 59.73.168.0/21 | 59.73.168.0–59.73.175.255 | 2,048 |
| 59.73.192.0/19 | 59.73.192.0–59.73.223.255 | 8,192 |
| 59.74.0.0/19 | 59.74.0.0–59.74.31.255 | 8,192 |
| 59.74.32.0/24 | 59.74.32.0–59.74.32.255 | 256 |
| 59.74.36.0/23 | 59.74.36.0–59.74.37.255 | 512 |
| 59.74.39.0/24 | 59.74.39.0–59.74.39.255 | 256 |
| 59.74.40.0/23 | 59.74.40.0–59.74.41.255 | 512 |
| 59.74.43.0/24 | 59.74.43.0–59.74.43.255 | 256 |
| 59.74.46.0/24 | 59.74.46.0–59.74.46.255 | 256 |
| 59.74.48.0/20 | 59.74.48.0–59.74.63.255 | 4,096 |
| 59.74.50.0/24 | 59.74.50.0–59.74.50.255 | 256 |
| 59.74.55.0/24 | 59.74.55.0–59.74.55.255 | 256 |
| 59.74.56.0/24 | 59.74.56.0–59.74.56.255 | 256 |
| 59.74.57.0/24 | 59.74.57.0–59.74.57.255 | 256 |
| 59.74.58.0/24 | 59.74.58.0–59.74.58.255 | 256 |
| 59.74.61.0/24 | 59.74.61.0–59.74.61.255 | 256 |
| 59.74.63.0/24 | 59.74.63.0–59.74.63.255 | 256 |
| 59.74.64.0/19 | 59.74.64.0–59.74.95.255 | 8,192 |
| 59.74.96.0/20 | 59.74.96.0–59.74.111.255 | 4,096 |
| 59.74.112.0/20 | 59.74.112.0–59.74.127.255 | 4,096 |
| 59.74.128.0/20 | 59.74.128.0–59.74.143.255 | 4,096 |
| 59.74.160.0/19 | 59.74.160.0–59.74.191.255 | 8,192 |
| 59.74.192.0/20 | 59.74.192.0–59.74.207.255 | 4,096 |
| 59.74.208.0/20 | 59.74.208.0–59.74.223.255 | 4,096 |
| 59.74.224.0/21 | 59.74.224.0–59.74.231.255 | 2,048 |
| 59.74.232.0/21 | 59.74.232.0–59.74.239.255 | 2,048 |
| 59.74.248.0/24 | 59.74.248.0–59.74.248.255 | 256 |
| 59.75.2.0/23 | 59.75.2.0–59.75.3.255 | 512 |
| 59.75.8.0/21 | 59.75.8.0–59.75.15.255 | 2,048 |
| 59.75.16.0/20 | 59.75.16.0–59.75.31.255 | 4,096 |
| 59.75.32.0/20 | 59.75.32.0–59.75.47.255 | 4,096 |
| 59.75.52.0/23 | 59.75.52.0–59.75.53.255 | 512 |
| 59.75.60.0/22 | 59.75.60.0–59.75.63.255 | 1,024 |
| 59.75.64.0/22 | 59.75.64.0–59.75.67.255 | 1,024 |
| 59.75.68.0/22 | 59.75.68.0–59.75.71.255 | 1,024 |
| 59.75.72.0/22 | 59.75.72.0–59.75.75.255 | 1,024 |
| 59.75.80.0/20 | 59.75.80.0–59.75.95.255 | 4,096 |
| 59.75.96.0/21 | 59.75.96.0–59.75.103.255 | 2,048 |
| 59.75.104.0/21 | 59.75.104.0–59.75.111.255 | 2,048 |
| 59.75.112.0/21 | 59.75.112.0–59.75.119.255 | 2,048 |
| 59.75.120.0/21 | 59.75.120.0–59.75.127.255 | 2,048 |
| 59.75.128.0/21 | 59.75.128.0–59.75.135.255 | 2,048 |
| 59.75.142.0/24 | 59.75.142.0–59.75.142.255 | 256 |
| 59.75.144.0/21 | 59.75.144.0–59.75.151.255 | 2,048 |
| 59.75.144.0/24 | 59.75.144.0–59.75.144.255 | 256 |
| 59.75.145.0/24 | 59.75.145.0–59.75.145.255 | 256 |
| 59.75.149.0/24 | 59.75.149.0–59.75.149.255 | 256 |
| 59.75.160.0/20 | 59.75.160.0–59.75.175.255 | 4,096 |
| 59.75.176.0/21 | 59.75.176.0–59.75.183.255 | 2,048 |
| 59.75.176.0/24 | 59.75.176.0–59.75.176.255 | 256 |
| 59.75.182.0/24 | 59.75.182.0–59.75.182.255 | 256 |
| 59.75.183.0/24 | 59.75.183.0–59.75.183.255 | 256 |
| 59.75.192.0/21 | 59.75.192.0–59.75.199.255 | 2,048 |
| 59.75.192.0/24 | 59.75.192.0–59.75.192.255 | 256 |
| 59.75.208.0/23 | 59.75.208.0–59.75.209.255 | 512 |
| 59.75.208.0/24 | 59.75.208.0–59.75.208.255 | 256 |
| 59.75.216.0/21 | 59.75.216.0–59.75.223.255 | 2,048 |
| 59.75.224.0/20 | 59.75.224.0–59.75.239.255 | 4,096 |
| 59.75.240.0/21 | 59.75.240.0–59.75.247.255 | 2,048 |
| 59.76.36.0/22 | 59.76.36.0–59.76.39.255 | 1,024 |
| 59.76.40.0/24 | 59.76.40.0–59.76.40.255 | 256 |
| 59.76.41.0/24 | 59.76.41.0–59.76.41.255 | 256 |
| 59.76.42.0/24 | 59.76.42.0–59.76.42.255 | 256 |
| 59.76.44.0/22 | 59.76.44.0–59.76.47.255 | 1,024 |
| 59.76.48.0/20 | 59.76.48.0–59.76.63.255 | 4,096 |
| 59.76.64.0/22 | 59.76.64.0–59.76.67.255 | 1,024 |
| 59.76.64.0/24 | 59.76.64.0–59.76.64.255 | 256 |
| 59.76.65.0/24 | 59.76.65.0–59.76.65.255 | 256 |
| 59.76.66.0/24 | 59.76.66.0–59.76.66.255 | 256 |
| 59.76.67.0/24 | 59.76.67.0–59.76.67.255 | 256 |
| 59.76.68.0/22 | 59.76.68.0–59.76.71.255 | 1,024 |
| 59.76.72.0/22 | 59.76.72.0–59.76.75.255 | 1,024 |
| 59.76.76.0/22 | 59.76.76.0–59.76.79.255 | 1,024 |
| 59.76.80.0/21 | 59.76.80.0–59.76.87.255 | 2,048 |
| 59.76.88.0/21 | 59.76.88.0–59.76.95.255 | 2,048 |
| 59.76.96.0/21 | 59.76.96.0–59.76.103.255 | 2,048 |
| 59.76.112.0/20 | 59.76.112.0–59.76.127.255 | 4,096 |
| 59.76.128.0/20 | 59.76.128.0–59.76.143.255 | 4,096 |
| 59.76.144.0/20 | 59.76.144.0–59.76.159.255 | 4,096 |
| 59.76.224.0/20 | 59.76.224.0–59.76.239.255 | 4,096 |
| 59.77.0.0/16 | 59.77.0.0–59.77.255.255 | 65,536 |
| 59.78.0.0/16 | 59.78.0.0–59.78.255.255 | 65,536 |
| 59.78.0.0/18 | 59.78.0.0–59.78.63.255 | 16,384 |
| 59.78.171.0/24 | 59.78.171.0–59.78.171.255 | 256 |
| 59.79.0.0/16 | 59.79.0.0–59.79.255.255 | 65,536 |
| 59.79.112.0/23 | 59.79.112.0–59.79.113.255 | 512 |
| 59.79.224.0/19 | 59.79.224.0–59.79.255.255 | 8,192 |
| 101.4.0.0/14 | 101.4.0.0–101.7.255.255 | 262,144 |
| 101.4.0.0/20 | 101.4.0.0–101.4.15.255 | 4,096 |
| 101.4.2.0/24 | 101.4.2.0–101.4.2.255 | 256 |
| 101.4.16.0/20 | 101.4.16.0–101.4.31.255 | 4,096 |
| 101.4.32.0/20 | 101.4.32.0–101.4.47.255 | 4,096 |
| 101.4.48.0/21 | 101.4.48.0–101.4.55.255 | 2,048 |
| 101.4.56.0/24 | 101.4.56.0–101.4.56.255 | 256 |
| 101.4.63.0/24 | 101.4.63.0–101.4.63.255 | 256 |
| 101.4.64.0/20 | 101.4.64.0–101.4.79.255 | 4,096 |
| 101.4.140.0/24 | 101.4.140.0–101.4.140.255 | 256 |
| 101.4.156.0/24 | 101.4.156.0–101.4.156.255 | 256 |
| 101.4.160.0/23 | 101.4.160.0–101.4.161.255 | 512 |
| 101.4.162.0/23 | 101.4.162.0–101.4.163.255 | 512 |
| 101.4.192.0/18 | 101.4.192.0–101.4.255.255 | 16,384 |
| 101.5.0.0/16 | 101.5.0.0–101.5.255.255 | 65,536 |
| 101.5.0.0/17 | 101.5.0.0–101.5.127.255 | 32,768 |
| 101.5.24.0/21 | 101.5.24.0–101.5.31.255 | 2,048 |
| 101.5.40.0/21 | 101.5.40.0–101.5.47.255 | 2,048 |
| 101.5.128.0/17 | 101.5.128.0–101.5.255.255 | 32,768 |
| 101.5.128.0/21 | 101.5.128.0–101.5.135.255 | 2,048 |
| 101.5.136.0/21 | 101.5.136.0–101.5.143.255 | 2,048 |
| 101.6.0.0/16 | 101.6.0.0–101.6.255.255 | 65,536 |
| 101.6.0.0/17 | 101.6.0.0–101.6.127.255 | 32,768 |
| 101.6.6.0/24 | 101.6.6.0–101.6.6.255 | 256 |
| 101.6.16.0/23 | 101.6.16.0–101.6.17.255 | 512 |
| 101.6.128.0/17 | 101.6.128.0–101.6.255.255 | 32,768 |
| 101.7.0.0/22 | 101.7.0.0–101.7.3.255 | 1,024 |
| 101.7.64.0/18 | 101.7.64.0–101.7.127.255 | 16,384 |
| 101.7.128.0/18 | 101.7.128.0–101.7.191.255 | 16,384 |
| 101.7.160.0/24 | 101.7.160.0–101.7.160.255 | 256 |
| 101.7.192.0/20 | 101.7.192.0–101.7.207.255 | 4,096 |
| 101.7.208.0/22 | 101.7.208.0–101.7.211.255 | 1,024 |
| 101.7.224.0/20 | 101.7.224.0–101.7.239.255 | 4,096 |
| 101.76.0.0/15 | 101.76.0.0–101.77.255.255 | 131,072 |
| 101.76.192.0/23 | 101.76.192.0–101.76.193.255 | 512 |
| 101.77.0.0/16 | 101.77.0.0–101.77.255.255 | 65,536 |
| 103.31.48.0/22 | 103.31.48.0–103.31.51.255 | 1,024 |
| 103.137.60.0/24 | 103.137.60.0–103.137.60.255 | 256 |
| 103.252.172.0/22 | 103.252.172.0–103.252.175.255 | 1,024 |
| 110.64.0.0/15 | 110.64.0.0–110.65.255.255 | 131,072 |
| 110.64.0.0/16 | 110.64.0.0–110.64.255.255 | 65,536 |
| 110.64.0.0/20 | 110.64.0.0–110.64.15.255 | 4,096 |
| 110.64.16.0/21 | 110.64.16.0–110.64.23.255 | 2,048 |
| 110.64.24.0/24 | 110.64.24.0–110.64.24.255 | 256 |
| 110.64.30.0/23 | 110.64.30.0–110.64.31.255 | 512 |
| 110.64.32.0/21 | 110.64.32.0–110.64.39.255 | 2,048 |
| 110.64.48.0/21 | 110.64.48.0–110.64.55.255 | 2,048 |
| 110.64.56.0/22 | 110.64.56.0–110.64.59.255 | 1,024 |
| 110.64.60.0/22 | 110.64.60.0–110.64.63.255 | 1,024 |
| 110.64.64.0/19 | 110.64.64.0–110.64.95.255 | 8,192 |
| 110.64.96.0/19 | 110.64.96.0–110.64.127.255 | 8,192 |
| 110.64.128.0/20 | 110.64.128.0–110.64.143.255 | 4,096 |
| 110.64.148.0/23 | 110.64.148.0–110.64.149.255 | 512 |
| 110.64.151.0/24 | 110.64.151.0–110.64.151.255 | 256 |
| 110.64.152.0/24 | 110.64.152.0–110.64.152.255 | 256 |
| 110.64.153.0/24 | 110.64.153.0–110.64.153.255 | 256 |
| 110.64.160.0/20 | 110.64.160.0–110.64.175.255 | 4,096 |
| 110.64.176.0/20 | 110.64.176.0–110.64.191.255 | 4,096 |
| 110.64.192.0/21 | 110.64.192.0–110.64.199.255 | 2,048 |
| 110.64.200.0/22 | 110.64.200.0–110.64.203.255 | 1,024 |
| 110.64.204.0/23 | 110.64.204.0–110.64.205.255 | 512 |
| 110.64.206.0/24 | 110.64.206.0–110.64.206.255 | 256 |
| 110.64.207.0/24 | 110.64.207.0–110.64.207.255 | 256 |
| 110.64.208.0/22 | 110.64.208.0–110.64.211.255 | 1,024 |
| 110.64.212.0/22 | 110.64.212.0–110.64.215.255 | 1,024 |
| 110.64.216.0/21 | 110.64.216.0–110.64.223.255 | 2,048 |
| 110.65.0.0/16 | 110.65.0.0–110.65.255.255 | 65,536 |
| 110.65.0.0/18 | 110.65.0.0–110.65.63.255 | 16,384 |
| 110.65.64.0/21 | 110.65.64.0–110.65.71.255 | 2,048 |
| 110.65.71.0/24 | 110.65.71.0–110.65.71.255 | 256 |
| 110.65.80.0/20 | 110.65.80.0–110.65.95.255 | 4,096 |
| 110.65.96.0/20 | 110.65.96.0–110.65.111.255 | 4,096 |
| 110.65.112.0/23 | 110.65.112.0–110.65.113.255 | 512 |
| 110.65.147.0/24 | 110.65.147.0–110.65.147.255 | 256 |
| 111.114.0.0/15 | 111.114.0.0–111.115.255.255 | 131,072 |
| 111.114.0.0/18 | 111.114.0.0–111.114.63.255 | 16,384 |
| 111.114.64.0/22 | 111.114.64.0–111.114.67.255 | 1,024 |
| 111.114.80.0/20 | 111.114.80.0–111.114.95.255 | 4,096 |
| 111.114.96.0/20 | 111.114.96.0–111.114.111.255 | 4,096 |
| 111.114.112.0/20 | 111.114.112.0–111.114.127.255 | 4,096 |
| 111.114.128.0/19 | 111.114.128.0–111.114.159.255 | 8,192 |
| 111.114.160.0/19 | 111.114.160.0–111.114.191.255 | 8,192 |
| 111.115.0.0/18 | 111.115.0.0–111.115.63.255 | 16,384 |
| 111.115.64.0/20 | 111.115.64.0–111.115.79.255 | 4,096 |
| 111.115.80.0/20 | 111.115.80.0–111.115.95.255 | 4,096 |
| 111.115.96.0/20 | 111.115.96.0–111.115.111.255 | 4,096 |
| 111.115.112.0/21 | 111.115.112.0–111.115.119.255 | 2,048 |
| 111.115.120.0/21 | 111.115.120.0–111.115.127.255 | 2,048 |
| 111.115.128.0/20 | 111.115.128.0–111.115.143.255 | 4,096 |
| 111.115.144.0/20 | 111.115.144.0–111.115.159.255 | 4,096 |
| 111.115.160.0/20 | 111.115.160.0–111.115.175.255 | 4,096 |
| 111.115.192.0/20 | 111.115.192.0–111.115.207.255 | 4,096 |
| 111.115.208.0/20 | 111.115.208.0–111.115.223.255 | 4,096 |
| 111.116.0.0/15 | 111.116.0.0–111.117.255.255 | 131,072 |
全3,490件のうち、先頭の500件を表示しています。全件のリストはTXT・CSVでダウンロードしてください。
CERNET のIPv6レンジ
| CIDR | 開始IP – 終了IP | アドレス数 |
|---|---|---|
| 2001:da8:257::/48 | 2001:da8:257::–2001:da8:257:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:da8:ff00::/40 | 2001:da8:ff00::–2001:da8:ffff:ffff:ffff:ffff:ffff:ffff | 288 |
| 2001:daa:1::/48 | 2001:daa:1::–2001:daa:1:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:2::/48 | 2001:daa:2::–2001:daa:2:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:3::/48 | 2001:daa:3::–2001:daa:3:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:4::/48 | 2001:daa:4::–2001:daa:4:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:5::/48 | 2001:daa:5::–2001:daa:5:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:6::/48 | 2001:daa:6::–2001:daa:6:ffff:ffff:ffff:ffff:ffff | 280 |
| 2001:daa:9::/48 | 2001:daa:9::–2001:daa:9:ffff:ffff:ffff:ffff:ffff | 280 |
全9件をすべて掲載しています。
CERNET のIPレンジデータについて
ASNと保有組織
CERNETはAS4538からプレフィックスを広報しています。レジストリ上の保有組織：AS4538 (ERX-CERNET-BKB - China Education and Research Network Center)。
リストに含まれるもの
これらのASNが公開BGPルーティングテーブルで広報しているプレフィックス（RIPEstat経由で取得）で、隣り合うブロックは統合していません。アドレスの所有記録ではないため、顧客が持ち込んだプレフィックスや貸し出しているアドレスが含まれたり、ごく少数の接続先にしか見えない経路が含まれなかったりすることがあります。取得日：2026-11-02。
主な用途
ファイアウォール、WAF、nginxでCERNETからの通信を許可・遮断する、ログの送信元IPをネットワーク別に分類する、CIDR照合であるIPがCERNETのものか判定する、といった使い方です。クラウドや通信事業者のアドレスでは顧客のサービスも動いているため、ネットワーク全体を遮断すると無関係なサイトまで巻き込むことがあります。
CERNET のIPレンジリストの使い方
- まず上の表を確認します。IPv4とIPv6が別の表になっていて、各行にCIDR、開始IP – 終了IP、アドレス数が載っています。
- 「TXTをダウンロード」または「CSVをダウンロード」で全件のリストを取得します。ページに表示した先頭の行だけでなく、全3,499件が入っています。
- TXTを1つのアドレスセットとして、ファイアウォール、ルーター、ipsetに取り込むか、CIDRをクラウドのセキュリティグループのルールに貼り付けます。
- 本番で使う前にスナップショット日（2026-11-02）を確認してください。クラウドのレンジは変更が多いので、事業者が公開している公式のレンジファイルとも照らし合わせます。
CERNET のIPレンジに関するよくある質問
CERNETのIPレンジはいくつありますか？
2026-11-02時点で、CERNETはAS4538から、公開BGPルーティングテーブルに3,490件のIPv4プレフィックス（合計17,173,248アドレス）と9件のIPv6プレフィックスを広報しています。
CERNETのASNは何ですか？
CERNETはAS4538を使っています。レジストリ上の保有組織：AS4538 (ERX-CERNET-BKB - China Education and Research Network Center)。大きな組織はASNを複数持つことが多く、このページでは確認できたものをまとめています。
CERNETのIPレンジをファイアウォールの許可リスト・拒否リストに使うには？
TXTファイル（1行1CIDR）をダウンロードし、ipset、nftables、nginxのallow/denyの設定、ルーターのアドレスリスト、クラウドのセキュリティグループに取り込みます。3,499件は1件ずつルールにせず、1つのアドレスセットとして取り込むのがおすすめです。CERNETのアドレスでは顧客のサービスも動いているため、全体を遮断すると無関係なサイトにも影響します。
CERNETのIPレンジはどのくらいの頻度で更新されますか？
このリストは2026-11-02のスナップショットで、おおよそ週に1回、公開BGP情報（RIPEstat）から作り直します。経路の広報は毎日変わるため、本番で使う前に再ダウンロードしてください。クラウド事業者の場合は、公式に公開されているレンジファイルとも照らし合わせてください。
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