BT

Data as of 2026-08-09
BGP inherited
Cluster stats
Netblocks717 · 32,294 IPv4 addresses
IPv6 184 prefixes (largest 2001:4d78:11a::/48)
Registered in United Kingdom (374) · Germany (21) · United States (19) · Portugal (16) · Czechia (13) · Netherlands (12)
All fragments 5,669 blocks across 950 clusters
Cluster ID217776624
RegistryAFRINIC
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 55 shared RIR contact/maintainer handles
Registry names 23 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
717 +17 netblocks since 2026-07-05
2026-07-05 peak 717 2026-08-09

IP Ranges (717)

showing 50 of 717 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
27.111.231.53/32 BT PEERINGDB ASSIGNED ● high
27.111.231.55/32 BT PEERINGDB ASSIGNED ● high
36.255.56.119/32 BT PEERINGDB ASSIGNED ● high
36.255.57.197/32 BT PEERINGDB ASSIGNED ● high
37.49.232.34/32 BT PEERINGDB ASSIGNED ● high
37.49.232.87/32 BT PEERINGDB ASSIGNED ● high
37.49.237.2/32 BT PEERINGDB ASSIGNED ● high
37.49.238.190/32 BT PEERINGDB ASSIGNED ● high
37.49.238.196/32 BT PEERINGDB ASSIGNED ● high
45.68.80.86/32 BT PEERINGDB ASSIGNED ● high
45.68.80.97/32 BT PEERINGDB ASSIGNED ● high
80.81.193.84/32 BT PEERINGDB ASSIGNED ● high
80.81.196.97/32 BT PEERINGDB ASSIGNED ● high
80.81.196.177/32 BT PEERINGDB ASSIGNED ● high
80.249.208.108/32 BT PEERINGDB ASSIGNED ● high
80.249.215.8/32 BT PEERINGDB ASSIGNED ● high
91.206.52.138/32 BT PEERINGDB ASSIGNED ● high
91.206.52.174/32 BT PEERINGDB ASSIGNED ● high
91.210.16.40/32 BT PEERINGDB ASSIGNED ● high
101.203.90.173/32 BT PEERINGDB ASSIGNED ● high
101.203.90.174/32 BT PEERINGDB ASSIGNED ● high
103.246.232.137/32 BT PEERINGDB ASSIGNED ● high
103.246.232.138/32 BT PEERINGDB ASSIGNED ● high
123.255.90.46/32 BT PEERINGDB ASSIGNED ● high
123.255.90.47/32 BT PEERINGDB ASSIGNED ● high
185.1.47.45/32 BT PEERINGDB ASSIGNED ● high
185.1.47.94/32 BT PEERINGDB ASSIGNED ● high
185.1.55.62/32 BT PEERINGDB ASSIGNED ● high
185.1.86.32/32 BT PEERINGDB ASSIGNED ● high
185.1.112.118/32 BT PEERINGDB ASSIGNED ● high
185.1.131.38/32 BT PEERINGDB ASSIGNED ● high
185.1.170.6/32 BT PEERINGDB ASSIGNED ● high
185.1.170.72/32 BT PEERINGDB ASSIGNED ● high
185.1.192.60/32 BT PEERINGDB ASSIGNED ● high
185.1.192.141/32 BT PEERINGDB ASSIGNED ● high
185.1.208.35/32 BT PEERINGDB ASSIGNED ● high
185.1.208.83/32 BT PEERINGDB ASSIGNED ● high
185.6.36.116/32 BT PEERINGDB ASSIGNED ● high
185.6.36.191/32 BT PEERINGDB ASSIGNED ● high
185.6.36.192/32 BT PEERINGDB ASSIGNED ● high
187.16.214.171/32 BT PEERINGDB ASSIGNED ● high
187.16.217.237/32 BT PEERINGDB ASSIGNED ● high
188.93.170.69/32 BT PEERINGDB ASSIGNED ● high
188.93.171.69/32 BT PEERINGDB ASSIGNED ● high
192.38.7.14/32 BT PEERINGDB ASSIGNED ● high
193.110.226.12/32 BT PEERINGDB ASSIGNED ● high
193.149.1.43/32 BT PEERINGDB ASSIGNED ● high
193.188.137.53/32 BT PEERINGDB ASSIGNED ● high
193.203.0.229/32 BT PEERINGDB ASSIGNED ● high
193.239.117.109/32 BT PEERINGDB ASSIGNED ● high

IPv6 ranges (184)

showing the 15 largest allocations
CIDR
2001:4d78:11a::/48
2a00:2381:1740::/48
2a00:2381:1efc::/48
2a00:2381:b3c::/48
2a00:2381:c5ac::/48
2a00:2381:c68::/48
2a00:2381:d70c::/48
2a00:2381:e0b3::/48
2a14:67c2:871::/48
2a00:2381:17e7:200::/56
2a00:2381:184d:1300::/56
2a00:2381:184d:2300::/56
2a00:2381:184d:2400::/56
2a00:2381:184d:2600::/56
2a00:2381:184d:2700::/56

Customer-delegated space

how is this classified?
Unclassified 535 (74.6%)
Operator infrastructure (named) 182 (25.4%)

Network trust

what's this?
RPKI hygiene: B how networks compare →
92.1% of checked blocks have valid RPKI ROA coverage (660 of 717)
No discrepancies found among checked blocks.

NIC Handles

AC2530-AP AI330-AP AS15525-MNT AS5089-MNT AS5400 AS6730-MNT AS9116-MNT BTNET-MNT CDN1-AP CH-UNISOURCE-MNT CIP-MNT CIZGI-MNT +43 more