COLT-UK
Data as of 2026-07-26
BGP inherited
Cluster stats
| Netblocks | 5 · 2,048 IPv4 addresses |
| IPv6 | 2 prefixes (largest 2001:920:3000::/38) |
| All fragments | 14 blocks across 10 clusters |
| Cluster ID | 216189762 |
| Registry | RIPE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 5 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
IP Ranges (5)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 64.137.12.0/23 | COLT-UK | RIPE | ASSIGNED PA | ● low |
| 64.137.20.0/23 | COLT-UK | RIPE | ASSIGNED PA | ● low |
| 64.137.24.0/22 | COLT-UK | RIPE | ASSIGNED PA | ● low |
| 2001:920:3000::/38 | Colt-UK | RIPE | ALLOCATED-BY-LIR | ● low |
| 2001:920:3400::/38 | Colt-UK | RIPE | ALLOCATED-BY-LIR | ● low |
IPv6 ranges (2)
Network trust
what's this?
RPKI hygiene: A
how networks compare →
100.0%
of checked blocks have valid RPKI ROA coverage
(5 of 5)
Possible discrepancies (3)
These blocks are registered to COLT-UK but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 64.137.24.0/22 /22 | authorized for AS42689 — Glide Student & Residential Limited |
| 64.137.12.0/23 /23 | authorized for AS42689 — Glide Student & Residential Limited |
| 64.137.20.0/23 /23 | authorized for AS42689 — Glide Student & Residential Limited |
NIC Handles
CABLE-FIBERLINK
COLT-MNT
DUMY-RIPE
DUMY-RIPE
lir-uk-fastplanet-1-MNT