Cambridge Telephone

Data as of 2026-08-23
BGP inherited
Cluster stats
Netblocks33 · 13,824 IPv4 addresses
IPv6 2 prefixes (largest 2604:9c40::/32)
Registered in United States (32) · Austria (1)
Cluster ID232890867
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

9 weekly snapshots · JSON
35 +12 netblocks since 2026-07-05
2026-07-05 peak 35 2026-08-23

IP Ranges (33)

⬇ export CSV
CIDR Org name Registry Status Confidence
23.172.192.0/24 Cambridge Telephone BGP ANNOUNCED ● high
45.33.208.0/20 Cambridge Telephone ARIN DIRECT ALLOCATION ● 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
66.232.72.0/21 Cambridge Telephone ARIN ALLOCATION ● high
66.232.80.0/22 Cambridge Telephone ARIN ALLOCATION ● high
185.207.179.0/24 Cambridge Telephone BGP ANNOUNCED ● high
199.58.120.0/21 Cambridge Telephone ARIN DIRECT ALLOCATION ● 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
208.98.170.0/24 Cambridge Telephone BGP ANNOUNCED ● high
208.98.176.0/22 Cambridge Telephone ARIN ALLOCATION ● high
209.19.132.0/23 Cambridge Telephone ARIN ALLOCATION ● high
209.19.144.0/24 Cambridge Telephone ARIN ALLOCATION ● high
209.19.149.0/24 Cambridge Telephone ARIN ALLOCATION ● high
209.19.150.0/23 Cambridge Telephone ARIN ALLOCATION ● high
209.19.154.0/23 Cambridge Telephone ARIN ALLOCATION ● high
209.19.158.0/24 Cambridge Telephone ARIN ALLOCATION ● high
209.19.171.0/24 Cambridge Telephone ARIN ALLOCATION ● high
216.182.107.0/24 Cambridge Telephone ARIN ALLOCATION ● high
2604:9c40::/32 Cambridge Telephone ARIN DIRECT ALLOCATION ● high
2606:6580::/32 Cambridge Telephone ARIN DIRECT ALLOCATION ● high

IPv6 ranges (2)

CIDR
2604:9c40::/32
2606:6580::/32

Network trust

what's this?
RPKI hygiene: C how networks compare →
77.1% of checked blocks have valid RPKI ROA coverage (27 of 35)
Possible discrepancies (7)

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.

209.19.132.0/23 /23 authorized for AS14230 — ARK Data Centers LLC
209.19.150.0/23 /23 authorized for AS14230 — ARK Data Centers LLC
209.19.154.0/23 /23 authorized for AS14230 — ARK Data Centers LLC
209.19.144.0/24 /24 authorized for AS14230 — ARK Data Centers LLC
209.19.149.0/24 /24 authorized for AS14230 — ARK Data Centers LLC
209.19.158.0/24 /24 authorized for AS14230 — ARK Data Centers LLC
209.19.171.0/24 /24 authorized for AS14230 — ARK Data Centers LLC

NIC Handles

AS397268 AS397285 CAMBR-3 NOC32278-ARIN NOC32278-ARIN NOC32278-ARIN NOC32278-ARIN