AS2856 — BT-UK-AS BTnet UK Regional network(GB)

Nutrition Label

Routing footprint

AS2856 announces 490 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

• 5.35.192.0/21
• 5.80.0.0/15
• 5.81.0.0/16
• 9.151.0.0/19
• 15.145.20.0/22
• 23.26.70.0/24
• 23.26.108.0/24
• 23.26.117.0/24
• 23.26.131.0/24
• 23.26.192.0/24
• 23.27.32.0/24
• 23.27.33.0/24
• 23.27.34.0/24
• 23.27.35.0/24
• 23.27.36.0/24
• 23.27.37.0/24
• 23.27.38.0/24
• 23.27.39.0/24
• 23.27.40.0/24
• 23.27.102.0/24
• 23.27.103.0/24
• 23.27.104.0/24
• 23.27.105.0/24
• 23.27.106.0/24
• 23.27.107.0/24

Peering ecosystem

147 distinct peers via BGP. The first 102 are listed below.

Blast radius

Approximate count of dependent hostnames if AS2856 disappeared from the routing table.

~5,282,053 hostnames depend on this network.Sampled from 10 prefixes, snapshot Thu, 21 May 2026 01:01:10 GMT.

MOAS / hijack watch

Prefixes routed by AS2856 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.

No active MOAS conflicts. Every prefix announced by AS2856 is unique to AS2856 in the current routing snapshot.

Threat posture

Related pages

Pivot deeper into the graph from AS2856.

• Country · GB
• Peer · SCHLUMBERGER-AS - Schlumberger LimitedAS72
• Prefix · 5.35.192.0/21
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP
• Whisper Internet Directory — home

Cypher and MCP

Reproduce the headline metric directly against graph.whisper.security:

MATCH (a:ASN {name: "AS2856"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS country

Or query Whisper from your own LLM workflow via the Whisper MCP server.