COLT TECHNOLOGY SERVICES GROUP LIMITED

COLT Technology Services Group Limited
GLEIF verified
Complete entity footprint
2 linked clusters · 4,988 netblocks · 77,859,907 IPv4 addresses
This organisation's clusters combined by evidence — shared operating domain colt.net — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
LEI
213800PIMH7Q7M27DB82
Registered name
COLT TECHNOLOGY SERVICES GROUP LIMITED
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks503 · 3,133,717 IPv4 addresses
Registered in United Kingdom (225) · Germany (81) · United States (30) · Japan (29) · Poland (20) · France (15)
Cluster ID208783377
RegistryAPNIC
Owner jurisdictionGB
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 213800PIMH7Q7M27DB82
Shared handles clustered on 100 shared RIR contact/maintainer handles
Registry names 19 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

5 weekly snapshots · JSON
333 0 netblocks since 2026-07-05
2026-07-05 peak 333 2026-07-19

IP Ranges (503)

showing 50 of 503 — see all⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
5.11.96.0/20 COLT Technology Services Group Limited BGP ANNOUNCED ● high
5.182.152.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
38.65.18.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
45.129.69.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
46.28.212.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
62.85.160.0/19 COLT Technology Services Group Limited BGP ANNOUNCED ● high
62.182.250.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
77.74.158.0/23 COLT Technology Services Group Limited BGP ANNOUNCED ● high
85.208.193.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.209.87.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.212.245.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.213.65.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.213.68.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.213.91.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.213.110.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.238.4.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
91.244.125.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
103.80.220.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
103.80.221.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
103.158.226.0/23 Colt Technology Services India Pvt Ltd APNIC ASSIGNED PORTABLE ● high
103.158.226.0/24 Colt Technology Services India Pvt Ltd BGP ANNOUNCED ● high
103.158.227.0/24 Colt Technology Services India Pvt Ltd BGP ANNOUNCED ● high
109.107.145.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
129.35.17.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
129.35.20.0/23 COLT Technology Services Group Limited BGP ANNOUNCED ● high
129.35.85.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
139.138.235.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
141.98.45.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
148.188.0.0/20 COLT Technology Services Group Limited BGP ANNOUNCED ● high
148.188.192.0/20 COLT Technology Services Group Limited BGP ANNOUNCED ● high
148.188.224.0/22 COLT Technology Services Group Limited BGP ANNOUNCED ● high
148.188.232.0/21 COLT Technology Services Group Limited BGP ANNOUNCED ● high
155.137.0.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
155.137.1.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
155.137.2.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
155.137.3.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
155.137.7.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
156.118.0.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
156.118.6.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
156.118.8.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
157.239.128.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
157.239.129.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
158.156.155.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
158.156.162.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
158.156.172.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
158.156.182.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
158.156.193.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
161.17.0.0/16 COLT Technology Services Group Limited BGP ANNOUNCED ● high
161.17.0.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high
163.199.254.0/24 COLT Technology Services Group Limited BGP ANNOUNCED ● high

Domains hosted in this network

what's this?

Network trust

what's this?
RPKI hygiene: C how networks compare →
78.1% of checked blocks have valid RPKI ROA coverage (393 of 503)
Possible discrepancies (4)

These blocks are registered to COLT Technology Services Group Limited but cryptographically authorized for a different, unrelated network (4 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2003:fd:9815::/48 /48 authorized for AS3320 — Deutsche Telekom AG
154.16.166.0/24 /24 authorized for AS834 — IPXO LLC
185.247.126.0/24 /24 authorized for AS212377 — Direccion General de la Guardia Civil
194.33.183.0/24 /24 authorized for AS2830 — Verizon Nederland B.V.

NIC Handles

AA AB34802-RIPE AC2221-AP AC2582-AP AC2677-AP ALL-MNT ALPHALINK-MNT AP708-AP APNIC-HM ARCOR-MNT ARTFILES-MNT AS12640-MNT +88 more