IP ranges

CERNET IP ranges

Every IPv4 and IPv6 range that CERNET (AS4538) currently announces on the internet, with CIDR and start/end IP, free to download as TXT or CSV. Data snapshot: 2026-11-02.

CERNET announces 3,490 IPv4 prefixes covering 17,173,248 addresses, and 9 IPv6 prefixes, through AS4538. The lists below are a snapshot of 2026-11-02 taken from the public BGP routing table, sorted by address and kept as announced.

ASNAS4538

IPv4 prefixes3,490

IPv4 addresses17,173,248Overlaps are counted once

IPv6 prefixes9

Data snapshot2026-11-02

Download the complete list

The complete list has 3,499 ranges (IPv4 and IPv6). TXT has one CIDR per line; CSV has the columns cidr, version, start_ip, end_ip and addresses.

Download TXT Download CSV IPv4 only (TXT)IPv6 only (TXT)

CERNET IPv4 ranges

IPv4 ranges announced by CERNET: CIDR, start and end IP, address count
CIDR	Start IP – end IP	Addresses
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

Showing the first 500 of 3,490 ranges. Download the TXT or CSV file for the complete list.

CERNET IPv6 ranges

IPv6 ranges announced by CERNET: CIDR, start and end IP, address count
CIDR	Start IP – end IP	Addresses
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

All 9 ranges are listed.

About the CERNET IP range data

ASNs and holders
CERNET announces its prefixes from AS4538. Holders in the registry: AS4538 (ERX-CERNET-BKB - China Education and Research Network Center).
What the list contains
The ranges are the prefixes these ASNs announce in the public BGP routing table (obtained through RIPEstat), with adjacent blocks left unmerged. This is not an ownership record: it can include prefixes of customers and leased address space, and it can miss routes that very few peers see. Snapshot of 2026-11-02.
Typical uses
Allow or block traffic from CERNET in a firewall, WAF or nginx, label source IPs in your logs by network, or test with a CIDR match whether an IP belongs to CERNET. Remember that cloud and carrier address space also runs the services of customers, so blocking a whole network can hit unrelated sites.

How to use the CERNET IP list

Start with the tables above: one for IPv4 and one for IPv6, each row with CIDR, start IP – end IP and address count.
Choose Download TXT or Download CSV for the complete list. The file has all 3,499 ranges, not only the first rows shown on the page.
Import the TXT as one address set into your firewall, router or ipset, or paste the CIDRs into a cloud security group rule.
Check the snapshot date (2026-11-02) before using it in production. Cloud ranges change often, so compare with the official range file published by the provider.

CERNET IP ranges: frequently asked questions

How many IP ranges does CERNET have?

As of 2026-11-02, CERNET announces 3,490 IPv4 prefixes covering 17,173,248 addresses and 9 IPv6 prefixes in the public BGP routing table, through AS4538.

What is the ASN of CERNET?

CERNET uses AS4538. Holders in the registry: AS4538 (ERX-CERNET-BKB - China Education and Research Network Center). Large organisations often run several ASNs, and this page merges the ones listed here.

How do I use the CERNET IP list for a firewall allowlist or blocklist?

Download the TXT file (one CIDR per line) and import it into ipset, nftables, an nginx allow or deny include, a router address list or a cloud security group. Import the 3,499 ranges as one address set rather than as separate rules. The address space of CERNET also hosts the services of its customers, so blocking all of it can cut off unrelated sites.

How often is the CERNET IP list updated?

The list is a snapshot of 2026-11-02, regenerated about once a week from public BGP data (RIPEstat). Announcements change every day, so download it again before using it in production, and for cloud providers also compare it with the official range file they publish.

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