AS8220 COLT COLT Technology Services Group Limited

COLT COLT Technology Services Group Limited · registered in the United Kingdom

IPv4 addresses1,488,895277 prefixes · 0.048% of announced IPv4

Rank in United Kingdom#8largest network in GB by IPv4 space, of 2,074 · 2.19% of GB

Rank worldwide#269of 79,396 networks with IPv4

IPv66 x /32 (393,228 x /48)32 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS8220 in ASN lookup Look up an IP in this network (27.110.0.1) All networks in United Kingdom

IPv4 prefixes

All 277 prefixes, in address order.

27.110.0.0/20
27.110.16.0/22
27.110.20.0/23
38.210.238.0/24
45.135.160.0/24
46.28.184.0/24
46.248.14.0/24
46.248.128.0/19
57.133.0.0/16
58.0.0.0/16
58.1.128.0/17
62.23.0.0/21
62.23.8.0/22
62.23.12.0/23
62.23.14.0/24
62.23.15.0/24
62.23.16.0/21
62.23.24.0/21
62.23.32.0/21
62.23.40.0/22
62.23.44.0/22
62.23.48.0/21
62.23.56.0/22
62.23.60.0/23
62.23.62.0/23
62.23.64.0/22
62.23.68.0/23
62.23.70.0/24
62.23.71.0/24
62.23.72.0/21
62.23.80.0/20
62.23.96.0/19
62.23.128.0/17
62.72.96.0/19
62.84.192.0/19
62.96.0.0/17
62.96.128.0/18
62.96.192.0/20
62.96.208.0/22
62.96.213.0/24
62.96.214.0/23
62.96.216.0/21
62.96.224.0/19
62.97.64.0/18
62.152.96.0/19
62.192.0.0/21
62.192.8.0/23
62.192.10.0/24
62.192.12.0/22
62.192.16.0/24
62.192.18.0/23
62.192.20.0/22
62.192.24.0/21
65.87.8.0/24
78.143.0.0/18
78.156.64.0/20
78.156.80.0/21
80.80.0.0/19
80.169.0.0/20
80.169.16.0/23
80.169.18.0/24
80.169.20.0/22
80.169.24.0/21
80.169.32.0/19
80.169.64.0/18
80.169.128.0/17
80.251.160.0/19
82.112.192.0/19
84.14.0.0/18
84.14.64.0/18
84.14.128.0/20
84.14.144.0/22
84.14.148.0/24
84.14.150.0/23
84.14.152.0/21
84.14.160.0/19
84.14.192.0/20
84.14.208.0/21
84.14.216.0/23
84.14.218.0/23
84.14.220.0/22
84.14.224.0/20
84.14.240.0/22
84.14.244.0/24
84.14.246.0/23
84.14.248.0/21
84.16.160.0/19
85.88.128.0/19
87.241.0.0/18
90.152.0.0/17
91.212.43.0/24
95.175.192.0/19
103.138.100.0/22
103.248.76.0/24
110.50.78.0/23
116.83.0.0/17
118.67.224.0/19
134.128.168.0/22
136.225.0.0/16
145.224.32.0/23
148.109.0.0/20
148.109.16.0/21
148.109.24.0/23
148.109.26.0/23
148.109.28.0/22
148.109.32.0/19
148.109.64.0/18
148.109.128.0/17
153.96.140.0/23
154.16.166.0/24
155.45.128.0/24
157.2.32.0/21
157.2.41.0/24
157.2.42.0/23
157.2.44.0/22
157.2.48.0/22
157.2.52.0/24
157.2.53.0/24
157.2.54.0/23
157.2.56.0/21
157.120.224.0/21
157.120.236.0/22
157.120.240.0/20
158.162.32.0/19
158.162.192.0/18
173.247.225.0/24
178.159.176.0/20
181.41.193.0/24
182.54.238.0/24
185.138.136.0/22
185.194.232.0/23
192.51.54.0/24
192.103.52.0/24
192.187.137.0/24
193.16.48.0/21
193.16.56.0/22
193.16.60.0/23
193.16.62.0/24
193.16.155.0/24
193.17.178.0/24
193.30.84.0/24
193.33.182.0/23
193.82.0.0/18
193.96.108.0/23
193.98.156.0/24
193.102.132.0/24
193.111.24.0/23
193.118.224.0/19
193.134.159.0/24
193.141.139.0/24
193.183.185.0/24
193.228.0.0/24
193.235.44.0/23
194.0.195.0/24
194.36.128.0/24
194.113.246.0/24
194.115.212.0/22
194.127.228.0/24
194.223.128.0/19
195.20.223.0/24
195.68.0.0/18
195.68.64.0/21
195.68.72.0/23
195.68.74.0/24
195.68.75.0/24
195.68.76.0/22
195.68.80.0/20
195.68.96.0/19
195.78.50.0/23
195.110.64.0/19
195.234.180.0/24
202.7.104.0/24
202.24.96.0/22
202.95.218.0/23
202.134.253.0/24
202.255.101.0/24
202.255.102.0/24
208.85.76.0/24
212.0.96.0/19
212.23.224.0/19
212.31.224.0/19
212.35.96.0/19
212.36.32.0/19
212.36.144.0/20
212.36.160.0/20
212.36.184.0/21
212.74.77.0/24
212.74.78.0/23
212.78.160.0/19
212.121.128.0/21
212.121.136.0/23
212.121.138.0/24
212.121.140.0/22
212.121.144.0/20
212.123.192.0/18
212.161.0.0/19
212.161.32.0/20
212.161.48.0/21
212.161.56.0/23
212.161.58.0/24
212.161.60.0/22
212.161.64.0/18
212.203.64.0/18
213.27.128.0/17
213.41.0.0/17
213.61.0.0/18
213.61.64.0/23
213.61.66.0/26
213.61.66.64/27
213.61.66.96/28
213.61.66.112/30
213.61.66.117/32
213.61.66.118/31
213.61.66.120/29
213.61.66.128/25
213.61.67.0/24
213.61.68.0/22
213.61.72.0/21
213.61.80.0/20
213.61.96.0/19
213.61.128.0/17
213.86.0.0/18
213.86.64.0/20
213.86.80.0/22
213.86.84.0/24
213.86.86.0/23
213.86.88.0/21
213.86.96.0/20
213.86.112.0/21
213.86.120.0/22
213.86.125.0/24
213.86.126.0/23
213.86.128.0/17
213.164.0.0/21
213.164.8.0/24
213.164.10.0/23
213.164.12.0/22
213.164.16.0/20
213.173.160.0/24
213.173.162.0/23
213.173.164.0/22
213.173.168.0/23
213.173.170.0/24
213.173.172.0/22
213.173.176.0/20
213.185.160.0/19
213.208.192.0/18
213.215.128.0/17
213.229.128.0/18
213.246.192.0/18
217.110.0.0/19
217.110.32.0/21
217.110.40.0/22
217.110.45.0/24
217.110.46.0/23
217.110.48.0/21
217.110.56.0/22
217.110.60.0/23
217.110.63.0/24
217.110.64.0/18
217.110.128.0/17
217.111.0.0/19
217.111.32.0/21
217.111.40.0/22
217.111.45.0/24
217.111.46.0/23
217.111.48.0/20
217.111.64.0/18
217.111.128.0/21
217.111.136.0/23
217.111.140.0/22
217.111.144.0/20
217.111.160.0/22
217.111.168.0/21
217.111.176.0/20
217.111.192.0/18
217.173.96.0/20

IPv6 prefixes

All 32 prefixes.

2001:678:868::/48
2001:678:1020::/48
2001:67c:424::/48
2001:67c:2b34::/48
2001:920::/31
2001:924::/31
2001:926::/42
2001:926:40::/48
2001:926:41::/48
2001:926:42::/47
2001:926:44::/46
2001:926:48::/45
2001:926:50::/44
2001:926:60::/43
2001:926:80::/41
2001:926:100::/40
2001:926:200::/39
2001:926:400::/38
2001:926:800::/37
2001:926:1000::/36
2001:926:2000::/35
2001:926:4000::/34
2001:926:8000::/33
2400:81e0::/32
2a06:6540:1241::/48
2a06:6540:1440::/48
2a06:6540:4101::/48
2a06:6540:4181::/48
2a06:6541:1241::/48
2a06:6541:1440::/48
2a06:6541:4101::/48
2a06:6541:4181::/48

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources