AS2856
British Telecommunications Limited
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Multiple-origin (MOAS) routing anomaly −12
- Trust score 53 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 2 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS2856 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 51.64.35.0/24 | AS2856, AS15404 | 2026-07-18 08:52:43 |
| 51.64.34.0/24 | AS2856, AS15404 | 2026-07-17 19:22:38 |
Network profile
Source: PeeringDB →Present at 2 internet exchanges: LINX LON1: Main, LINX LON2
Web3 footprint
AS2856 hosts 5 observed decentralized-network nodes across 3 networks. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
AS2856 — global IP footprint
Cities where AS2856 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS2856 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 23.26.70.0/24 | 13,253 | 2026-07-18 11:59:07 |
| 51.194.40.0/21 | 12,808 | 2026-07-13 06:46:19 |
| 51.146.132.0/22 | 12,797 | 2026-07-13 06:46:19 |
| 5.35.192.0/21 | 12,796 | 2026-07-18 11:59:01 |
| 23.27.37.0/24 | 12,704 | 2026-07-18 11:59:07 |
| 23.27.107.0/24 | 12,703 | 2026-07-18 11:59:07 |
| 23.27.104.0/24 | 12,676 | 2026-07-18 11:59:07 |
| 23.27.38.0/24 | 12,664 | 2026-07-18 11:59:07 |
| 51.146.60.0/22 | 12,657 | 2026-07-13 06:46:19 |
| 23.26.131.0/24 | 12,485 | 2026-07-18 11:59:07 |
| 151.240.180.0/22 | 12,476 | 2026-07-18 12:00:57 |
| 82.108.44.0/22 | 12,460 | 2026-07-18 11:59:17 |
| 23.27.33.0/24 | 12,439 | 2026-07-18 11:59:07 |
| 178.94.244.0/22 | 12,408 | 2026-07-18 12:00:57 |
| 51.194.120.0/21 | 12,333 | 2026-07-13 06:46:19 |
| 178.92.180.0/22 | 12,320 | 2026-07-18 12:00:57 |
| 51.194.88.0/21 | 12,318 | 2026-07-13 06:46:19 |
| 89.39.172.0/23 | 12,290 | 2026-07-18 11:59:17 |
| 151.241.192.0/22 | 12,288 | 2026-07-18 12:00:57 |
| 151.245.204.0/22 | 12,286 | 2026-07-18 12:00:57 |
| 145.79.172.0/22 | 12,265 | 2026-07-18 12:00:57 |
| 79.139.52.0/23 | 12,253 | 2026-07-18 11:59:17 |
| 82.153.85.0/24 | 12,251 | 2026-07-18 11:59:17 |
| 23.27.39.0/24 | 12,250 | 2026-07-18 11:59:07 |
| 37.44.230.0/24 | 12,249 | 2026-07-18 11:59:10 |
| 51.146.40.0/22 | 12,209 | 2026-07-13 06:46:19 |
| 82.153.190.0/24 | 12,202 | 2026-07-18 11:59:17 |
| 95.173.59.0/24 | 12,197 | 2026-07-18 11:59:17 |
| 151.245.80.0/22 | 12,195 | 2026-07-18 12:00:57 |
| 151.244.80.0/22 | 12,194 | 2026-07-18 12:00:57 |
| 151.240.200.0/22 | 12,172 | 2026-07-18 12:00:57 |
| 23.27.35.0/24 | 12,168 | 2026-07-18 11:59:07 |
| 23.27.103.0/24 | 12,167 | 2026-07-18 11:59:07 |
| 82.108.32.0/21 | 12,141 | 2026-07-18 11:59:17 |
| 23.27.106.0/24 | 12,134 | 2026-07-18 11:59:07 |
| 23.27.102.0/24 | 12,132 | 2026-07-18 11:59:07 |
| 212.134.52.0/24 | 12,130 | 2026-07-18 12:00:57 |
| 82.108.4.0/22 | 12,118 | 2026-07-18 11:59:17 |
| 79.139.54.0/23 | 12,116 | 2026-07-18 11:59:17 |
| 9.151.0.0/19 | 12,113 | 2026-07-18 11:59:04 |
| 23.27.36.0/24 | 12,111 | 2026-07-18 11:59:07 |
| 23.27.32.0/24 | 12,108 | 2026-07-18 11:59:07 |
| 167.148.60.0/22 | 12,093 | 2026-07-18 12:00:57 |
| 166.88.18.0/24 | 12,089 | 2026-07-18 12:00:57 |
| 151.244.204.0/22 | 12,063 | 2026-07-18 12:00:57 |
| 151.244.208.0/22 | 12,059 | 2026-07-18 12:00:57 |
| 23.27.40.0/24 | 12,058 | 2026-07-18 11:59:07 |
| 212.134.54.0/24 | 12,053 | 2026-07-18 12:00:57 |
| 79.132.65.0/24 | 12,049 | 2026-07-18 11:59:17 |
| 212.134.124.0/22 | 12,045 | 2026-07-18 12:00:57 |
Showing top 50 of 507 announced prefixes by sample volume.
Frequently Asked Questions
What is AS2856?
AS2856 is an Autonomous System Number assigned to British Telecommunications Limited. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS2856 announce?
AS2856 announces 13.78M IPv4 addresses distributed across 560 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS2856?
AS2856 is operated by British Telecommunications Limited. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS2856 registered in?
AS2856 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
