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IP ranges

Colt Technology Services IP ranges

Every IPv4 and IPv6 range that Colt Technology Services (AS8220) currently announces on the internet, with CIDR and start/end IP, free to download as TXT or CSV. Data snapshot: 2026-11-02.

Colt Technology Services announces 153 IPv4 prefixes covering 1,496,576 addresses, and 19 IPv6 prefixes, through AS8220. The lists below are a snapshot of 2026-11-02 taken from the public BGP routing table, sorted by address and kept as announced.

ASNAS8220
IPv4 prefixes153
IPv4 addresses1,496,576Overlaps are counted once
IPv6 prefixes19
Data snapshot

Download the complete list

The complete list has 172 ranges (IPv4 and IPv6). TXT has one CIDR per line; CSV has the columns cidr, version, start_ip, end_ip and addresses.

Download TXTDownload CSVIPv4 only (TXT)IPv6 only (TXT)

Colt Technology Services IPv4 ranges

IPv4 ranges announced by Colt Technology Services: CIDR, start and end IP, address count
CIDRStart IP – end IPAddresses
27.110.0.0/2027.110.0.0–27.110.15.2554,096
27.110.16.0/2227.110.16.0–27.110.19.2551,024
27.110.20.0/2327.110.20.0–27.110.21.255512
38.210.238.0/2438.210.238.0–38.210.238.255256
45.135.160.0/2445.135.160.0–45.135.160.255256
46.28.184.0/2446.28.184.0–46.28.184.255256
46.248.14.0/2446.248.14.0–46.248.14.255256
46.248.128.0/1946.248.128.0–46.248.159.2558,192
57.133.0.0/1657.133.0.0–57.133.255.25565,536
58.0.0.0/1658.0.0.0–58.0.255.25565,536
58.1.128.0/1758.1.128.0–58.1.255.25532,768
62.23.0.0/1662.23.0.0–62.23.255.25565,536
62.23.14.0/2462.23.14.0–62.23.14.255256
62.23.23.0/2462.23.23.0–62.23.23.255256
62.23.43.0/2462.23.43.0–62.23.43.255256
62.23.61.0/2462.23.61.0–62.23.61.255256
62.23.70.0/2462.23.70.0–62.23.70.255256
62.23.254.0/2462.23.254.0–62.23.254.255256
62.23.255.0/2462.23.255.0–62.23.255.255256
62.72.96.0/1962.72.96.0–62.72.127.2558,192
62.84.192.0/1962.84.192.0–62.84.223.2558,192
62.96.0.0/1662.96.0.0–62.96.255.25565,536
62.97.64.0/1862.97.64.0–62.97.127.25516,384
62.152.96.0/1962.152.96.0–62.152.127.2558,192
62.192.0.0/1962.192.0.0–62.192.31.2558,192
65.87.8.0/2465.87.8.0–65.87.8.255256
78.143.0.0/1878.143.0.0–78.143.63.25516,384
78.156.64.0/2078.156.64.0–78.156.79.2554,096
78.156.80.0/2178.156.80.0–78.156.87.2552,048
80.80.0.0/1980.80.0.0–80.80.31.2558,192
80.169.0.0/1680.169.0.0–80.169.255.25565,536
80.251.160.0/1980.251.160.0–80.251.191.2558,192
82.112.192.0/1982.112.192.0–82.112.223.2558,192
84.14.0.0/1684.14.0.0–84.14.255.25565,536
84.14.63.0/2484.14.63.0–84.14.63.255256
84.14.217.0/2484.14.217.0–84.14.217.255256
84.16.160.0/1984.16.160.0–84.16.191.2558,192
85.88.128.0/1985.88.128.0–85.88.159.2558,192
87.241.0.0/1887.241.0.0–87.241.63.25516,384
90.152.0.0/1890.152.0.0–90.152.63.25516,384
90.152.64.0/1890.152.64.0–90.152.127.25516,384
90.152.64.0/1990.152.64.0–90.152.95.2558,192
90.152.96.0/1990.152.96.0–90.152.127.2558,192
91.212.43.0/2491.212.43.0–91.212.43.255256
95.175.192.0/2095.175.192.0–95.175.207.2554,096
95.175.208.0/2095.175.208.0–95.175.223.2554,096
103.138.100.0/22103.138.100.0–103.138.103.2551,024
103.248.76.0/24103.248.76.0–103.248.76.255256
110.50.78.0/23110.50.78.0–110.50.79.255512
116.83.0.0/17116.83.0.0–116.83.127.25532,768
118.67.224.0/19118.67.224.0–118.67.255.2558,192
134.128.168.0/22134.128.168.0–134.128.171.2551,024
136.225.0.0/16136.225.0.0–136.225.255.25565,536
145.224.32.0/23145.224.32.0–145.224.33.255512
148.109.0.0/16148.109.0.0–148.109.255.25565,536
148.109.25.0/24148.109.25.0–148.109.25.255256
153.96.140.0/24153.96.140.0–153.96.140.255256
153.96.141.0/24153.96.141.0–153.96.141.255256
154.16.166.0/24154.16.166.0–154.16.166.255256
155.45.128.0/24155.45.128.0–155.45.128.255256
157.2.32.0/19157.2.32.0–157.2.63.2558,192
157.2.48.0/21157.2.48.0–157.2.55.2552,048
157.2.52.0/24157.2.52.0–157.2.52.255256
157.120.224.0/21157.120.224.0–157.120.231.2552,048
157.120.236.0/22157.120.236.0–157.120.239.2551,024
157.120.240.0/20157.120.240.0–157.120.255.2554,096
158.162.32.0/19158.162.32.0–158.162.63.2558,192
158.162.192.0/18158.162.192.0–158.162.255.25516,384
173.247.225.0/24173.247.225.0–173.247.225.255256
178.159.176.0/20178.159.176.0–178.159.191.2554,096
181.41.193.0/24181.41.193.0–181.41.193.255256
182.54.238.0/24182.54.238.0–182.54.238.255256
185.138.136.0/22185.138.136.0–185.138.139.2551,024
185.157.227.0/24185.157.227.0–185.157.227.255256
185.194.232.0/23185.194.232.0–185.194.233.255512
192.51.54.0/24192.51.54.0–192.51.54.255256
192.103.52.0/24192.103.52.0–192.103.52.255256
192.187.137.0/24192.187.137.0–192.187.137.255256
193.16.48.0/21193.16.48.0–193.16.55.2552,048
193.16.56.0/22193.16.56.0–193.16.59.2551,024
193.16.60.0/23193.16.60.0–193.16.61.255512
193.16.62.0/24193.16.62.0–193.16.62.255256
193.16.155.0/24193.16.155.0–193.16.155.255256
193.17.178.0/24193.17.178.0–193.17.178.255256
193.30.84.0/24193.30.84.0–193.30.84.255256
193.33.182.0/23193.33.182.0–193.33.183.255512
193.82.0.0/19193.82.0.0–193.82.31.2558,192
193.82.32.0/19193.82.32.0–193.82.63.2558,192
193.96.108.0/23193.96.108.0–193.96.109.255512
193.98.156.0/24193.98.156.0–193.98.156.255256
193.102.132.0/24193.102.132.0–193.102.132.255256
193.111.24.0/23193.111.24.0–193.111.25.255512
193.118.224.0/19193.118.224.0–193.118.255.2558,192
193.134.159.0/24193.134.159.0–193.134.159.255256
193.141.139.0/24193.141.139.0–193.141.139.255256
193.183.185.0/24193.183.185.0–193.183.185.255256
193.228.0.0/24193.228.0.0–193.228.0.255256
193.235.44.0/24193.235.44.0–193.235.44.255256
193.235.45.0/24193.235.45.0–193.235.45.255256
194.0.195.0/24194.0.195.0–194.0.195.255256
194.36.128.0/24194.36.128.0–194.36.128.255256
194.76.2.0/23194.76.2.0–194.76.3.255512
194.76.4.0/22194.76.4.0–194.76.7.2551,024
194.113.246.0/24194.113.246.0–194.113.246.255256
194.115.212.0/22194.115.212.0–194.115.215.2551,024
194.127.228.0/24194.127.228.0–194.127.228.255256
194.223.128.0/21194.223.128.0–194.223.135.2552,048
194.223.136.0/22194.223.136.0–194.223.139.2551,024
194.223.140.0/22194.223.140.0–194.223.143.2551,024
194.223.144.0/20194.223.144.0–194.223.159.2554,096
195.20.223.0/24195.20.223.0–195.20.223.255256
195.68.0.0/17195.68.0.0–195.68.127.25532,768
195.68.74.0/24195.68.74.0–195.68.74.255256
195.78.50.0/23195.78.50.0–195.78.51.255512
195.110.64.0/19195.110.64.0–195.110.95.2558,192
195.234.180.0/24195.234.180.0–195.234.180.255256
202.7.104.0/24202.7.104.0–202.7.104.255256
202.24.96.0/23202.24.96.0–202.24.97.255512
202.24.98.0/23202.24.98.0–202.24.99.255512
202.95.218.0/23202.95.218.0–202.95.219.255512
202.134.253.0/24202.134.253.0–202.134.253.255256
202.255.101.0/24202.255.101.0–202.255.101.255256
202.255.102.0/24202.255.102.0–202.255.102.255256
208.85.76.0/24208.85.76.0–208.85.76.255256
212.0.96.0/19212.0.96.0–212.0.127.2558,192
212.23.224.0/19212.23.224.0–212.23.255.2558,192
212.31.224.0/19212.31.224.0–212.31.255.2558,192
212.35.96.0/19212.35.96.0–212.35.127.2558,192
212.36.32.0/19212.36.32.0–212.36.63.2558,192
212.36.144.0/20212.36.144.0–212.36.159.2554,096
212.36.160.0/20212.36.160.0–212.36.175.2554,096
212.36.184.0/21212.36.184.0–212.36.191.2552,048
212.74.77.0/24212.74.77.0–212.74.77.255256
212.74.78.0/24212.74.78.0–212.74.78.255256
212.74.79.0/24212.74.79.0–212.74.79.255256
212.78.160.0/19212.78.160.0–212.78.191.2558,192
212.121.128.0/19212.121.128.0–212.121.159.2558,192
212.123.192.0/18212.123.192.0–212.123.255.25516,384
212.161.0.0/17212.161.0.0–212.161.127.25532,768
212.203.64.0/18212.203.64.0–212.203.127.25516,384
213.27.128.0/17213.27.128.0–213.27.255.25532,768
213.41.0.0/17213.41.0.0–213.41.127.25532,768
213.61.0.0/16213.61.0.0–213.61.255.25565,536
213.86.0.0/16213.86.0.0–213.86.255.25565,536
213.164.0.0/19213.164.0.0–213.164.31.2558,192
213.173.160.0/19213.173.160.0–213.173.191.2558,192
213.185.160.0/19213.185.160.0–213.185.191.2558,192
213.208.192.0/18213.208.192.0–213.208.255.25516,384
213.215.128.0/17213.215.128.0–213.215.255.25532,768
213.229.128.0/18213.229.128.0–213.229.191.25516,384
213.246.192.0/18213.246.192.0–213.246.255.25516,384
217.110.0.0/15217.110.0.0–217.111.255.255131,072
217.173.96.0/20217.173.96.0–217.173.111.2554,096

All 153 ranges are listed.

Colt Technology Services IPv6 ranges

IPv6 ranges announced by Colt Technology Services: CIDR, start and end IP, address count
CIDRStart IP – end IPAddresses
2001:678:868::/482001:678:868::–2001:678:868:ffff:ffff:ffff:ffff:ffff280
2001:678:1020::/482001:678:1020::–2001:678:1020:ffff:ffff:ffff:ffff:ffff280
2001:67c:424::/482001:67c:424::–2001:67c:424:ffff:ffff:ffff:ffff:ffff280
2001:67c:2b34::/482001:67c:2b34::–2001:67c:2b34:ffff:ffff:ffff:ffff:ffff280
2001:920::/322001:920::–2001:920:ffff:ffff:ffff:ffff:ffff:ffff296
2001:921::/322001:921::–2001:921:ffff:ffff:ffff:ffff:ffff:ffff296
2001:924::/322001:924::–2001:924:ffff:ffff:ffff:ffff:ffff:ffff296
2001:925::/322001:925::–2001:925:ffff:ffff:ffff:ffff:ffff:ffff296
2001:926::/322001:926::–2001:926:ffff:ffff:ffff:ffff:ffff:ffff296
2001:926:40::/482001:926:40::–2001:926:40:ffff:ffff:ffff:ffff:ffff280
2400:81e0::/322400:81e0::–2400:81e0:ffff:ffff:ffff:ffff:ffff:ffff296
2a06:6540:1241::/482a06:6540:1241::–2a06:6540:1241:ffff:ffff:ffff:ffff:ffff280
2a06:6540:1440::/482a06:6540:1440::–2a06:6540:1440:ffff:ffff:ffff:ffff:ffff280
2a06:6540:4101::/482a06:6540:4101::–2a06:6540:4101:ffff:ffff:ffff:ffff:ffff280
2a06:6540:4181::/482a06:6540:4181::–2a06:6540:4181:ffff:ffff:ffff:ffff:ffff280
2a06:6541:1241::/482a06:6541:1241::–2a06:6541:1241:ffff:ffff:ffff:ffff:ffff280
2a06:6541:1440::/482a06:6541:1440::–2a06:6541:1440:ffff:ffff:ffff:ffff:ffff280
2a06:6541:4101::/482a06:6541:4101::–2a06:6541:4101:ffff:ffff:ffff:ffff:ffff280
2a06:6541:4181::/482a06:6541:4181::–2a06:6541:4181:ffff:ffff:ffff:ffff:ffff280

All 19 ranges are listed.

About the Colt Technology Services IP range data

  • ASNs and holders

    Colt Technology Services announces its prefixes from AS8220. Holders in the registry: AS8220 (COLT COLT Technology Services Group Limited).

  • 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 Colt Technology Services 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 Colt Technology Services. 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 Colt Technology Services IP list

  1. Start with the tables above: one for IPv4 and one for IPv6, each row with CIDR, start IP – end IP and address count.
  2. Choose Download TXT or Download CSV for the complete list. The file has all 172 ranges, not only the first rows shown on the page.
  3. Import the TXT as one address set into your firewall, router or ipset, or paste the CIDRs into a cloud security group rule.
  4. 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.

Colt Technology Services IP ranges: frequently asked questions

How many IP ranges does Colt Technology Services have?

As of 2026-11-02, Colt Technology Services announces 153 IPv4 prefixes covering 1,496,576 addresses and 19 IPv6 prefixes in the public BGP routing table, through AS8220.

What is the ASN of Colt Technology Services?

Colt Technology Services uses AS8220. Holders in the registry: AS8220 (COLT COLT Technology Services Group Limited). Large organisations often run several ASNs, and this page merges the ones listed here.

How do I use the Colt Technology Services 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 172 ranges as one address set rather than as separate rules. The address space of Colt Technology Services also hosts the services of its customers, so blocking all of it can cut off unrelated sites.

How often is the Colt Technology Services 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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