$ query “AS8220” --type=asn → 1 result(s)

AS8220 · COLT

COLT Technology Services Group Limited

AS8220 is run by COLT Technology Services Group Limited and is a major transit provider, based in the United Kingdom since 2002. The system announces an impressive 1.5 million IPv4 addresses, including a /15, and supports IPv6. The bulk of its IP address space is in the United Kingdom, with additional presence in Germany and France, and smaller footprints in 38 additional countries. This AS has recently updated its prefix announcements.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #17 by Reach — Top 100 by customer cone size
  • #56 by Degree — Top 100 by unique BGP neighbor count
  • #2 in United Kingdom — Top 10 by reach within country

Basic Information

Country
🇬🇧 United Kingdom
Category
Hosting
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
August 29, 2002
Last Changed
March 04, 2026
Last Seen
April 18, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
153 / 128
IPv6 Prefixes (raw / aggregated)
19 / 16
IPv4 Addresses
1 496 576
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/31
Geolocated Countries
🇬🇧 United Kingdom (624 320 IPs), 🇩🇪 Germany (598 848 IPs), 🇫🇷 France (373 568 IPs) and 38 more
Prefix Changed
April 19, 2026

Reputation

Reputation
Good — 4 flagged IPs out of 1 496 576 total (0.00%)

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
943 networks exchanging traffic without transit
Downstream Customers
1 061 downstreams buying transit
Unclassified
29 unclassified BGP neighbors
Degree
2 037 unique BGP neighbors
Reach
50 498 networks in customer cone

Upstream Providers (4)

  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS3491 — PCCWG-APAC-HK (Tier-1 transit)
  • AS6453 — AS6453 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (153 total)

  • 217.110.0.0/15 (131 072 addresses (/15 prefix))
  • 213.61.0.0/16 (65 536 addresses (/16 prefix))
  • 213.86.0.0/16 (65 536 addresses (/16 prefix))
  • 84.14.0.0/16 (65 536 addresses (/16 prefix))
  • 136.225.0.0/16 (65 536 addresses (/16 prefix))
  • 62.96.0.0/16 (65 536 addresses (/16 prefix))
  • 80.169.0.0/16 (65 536 addresses (/16 prefix))
  • 148.109.0.0/16 (65 536 addresses (/16 prefix))
  • 57.133.0.0/16 (65 536 addresses (/16 prefix))
  • 58.0.0.0/16 (65 536 addresses (/16 prefix))
  • 62.23.0.0/16 (65 536 addresses (/16 prefix))
  • 213.215.128.0/17 (32 768 addresses (/17 prefix))
  • 212.161.0.0/17 (32 768 addresses (/17 prefix))
  • 90.152.0.0/17 (32 768 addresses (/17 prefix))
  • 116.83.0.0/17 (32 768 addresses (/17 prefix))
  • 195.68.0.0/17 (32 768 addresses (/17 prefix))
  • 213.41.0.0/17 (32 768 addresses (/17 prefix))
  • 213.27.128.0/17 (32 768 addresses (/17 prefix))
  • 58.1.128.0/17 (32 768 addresses (/17 prefix))
  • 87.241.0.0/18 (16 384 addresses (/18 prefix))
  • 158.162.192.0/18 (16 384 addresses (/18 prefix))
  • 193.82.0.0/18 (16 384 addresses (/18 prefix))
  • 212.123.192.0/18 (16 384 addresses (/18 prefix))
  • 213.208.192.0/18 (16 384 addresses (/18 prefix))
  • 62.97.64.0/18 (16 384 addresses (/18 prefix))
  • 213.246.192.0/18 (16 384 addresses (/18 prefix))
  • 213.229.128.0/18 (16 384 addresses (/18 prefix))
  • 212.203.64.0/18 (16 384 addresses (/18 prefix))
  • 78.143.0.0/18 (16 384 addresses (/18 prefix))
  • 118.67.224.0/19 (8 192 addresses (/19 prefix))
  • 212.36.32.0/19 (8 192 addresses (/19 prefix))
  • 213.185.160.0/19 (8 192 addresses (/19 prefix))
  • 95.175.192.0/19 (8 192 addresses (/19 prefix))
  • 193.118.224.0/19 (8 192 addresses (/19 prefix))
  • 213.173.160.0/19 (8 192 addresses (/19 prefix))
  • 213.164.0.0/19 (8 192 addresses (/19 prefix))
  • 84.16.160.0/19 (8 192 addresses (/19 prefix))
  • 194.223.128.0/19 (8 192 addresses (/19 prefix))
  • 195.110.64.0/19 (8 192 addresses (/19 prefix))
  • 82.112.192.0/19 (8 192 addresses (/19 prefix))
  • 80.251.160.0/19 (8 192 addresses (/19 prefix))
  • 80.80.0.0/19 (8 192 addresses (/19 prefix))
  • 212.0.96.0/19 (8 192 addresses (/19 prefix))
  • 212.23.224.0/19 (8 192 addresses (/19 prefix))
  • 62.192.0.0/19 (8 192 addresses (/19 prefix))
  • 157.2.32.0/19 (8 192 addresses (/19 prefix))
  • 212.31.224.0/19 (8 192 addresses (/19 prefix))
  • 212.35.96.0/19 (8 192 addresses (/19 prefix))
  • 85.88.128.0/19 (8 192 addresses (/19 prefix))
  • 158.162.32.0/19 (8 192 addresses (/19 prefix))
  • and 78 more

IPv6 Prefixes (19 total)

  • 2001:920::/31
  • 2001:924::/31
  • 2400:81e0::/32
  • 2001:926::/32
  • 2a06:6540:1241::/48
  • 2001:67c:2b34::/48
  • 2001:67c:424::/48
  • 2001:678:1020::/48
  • 2001:678:868::/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