Cambridge Telephone
BGP inherited
Cluster stats
| Netblocks | 21 · 14,059 IPv4 addresses |
| Registered in | United States (18) · United Kingdom (2) · Austria (1) |
| Cluster ID | 208810341 |
| Registry | BGP |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 10 shared RIR contact/maintainer handles |
| Registry names | 3 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
23
0 netblocks since 2026-07-05
2026-07-05
peak 23
2026-07-19
IP Ranges (21)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 23.172.192.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.208.0/22 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.212.0/22 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.216.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.218.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.219.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.220.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.223.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 185.207.179.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.120.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.121.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.122.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.123.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.124.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.125.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.126.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 199.58.127.0/24 | Cambridge Telephone | BGP | ANNOUNCED | ● high |
| 45.33.208.0/20 | Cambridge Telephone | ARIN | DIRECT ALLOCATION | ● low |
| 194.83.236.0/22 | CAMBRIDGE-REG-COL | RIPE | ASSIGNED PA | ● low |
| 195.195.240.0/22 | CAMBRIDGE-REG-COL | RIPE | ASSIGNED PA | ● low |
| 199.58.120.0/21 | Cambridge Telephone | ARIN | DIRECT ALLOCATION | ● low |
Network trust
what's this?
RPKI hygiene: B
how networks compare →
90.5%
of checked blocks have valid RPKI ROA coverage
(19 of 21)
Possible discrepancies (2)
These blocks are registered to Cambridge Telephone 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.
| 194.83.236.0/22 /22 | authorized for AS786 — Jisc Services Limited |
| 195.195.240.0/22 /22 | authorized for AS786 — Jisc Services Limited |
NIC Handles
AS397268
AS397285
CAMBR-3
DUMY-RIPE
DUMY-RIPE
JANET-HOSTMASTER
NOC32278-ARIN
NOC32278-ARIN
NOC32278-ARIN
NOC32278-ARIN