Autonomous System

AS2856 · BTnet (BT's UK IP Network - AS2856)

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

bgp.tools RIPEstat

Announced IPs

18.43M

IPv4

IPv4 Prefixes

504

IPv6 Prefixes

Hosted Domains

21,562

resolve into this AS

Peers

Customers

153

AS Profile

AS Name

BTnet (BT's UK IP Network - AS2856)

Also known as

British Telecommunications

AS Type

NSP

Scope

Regional

Traffic

1-5Tbps

Website

http://www.bt.net

IRR AS-SET

RIPE::AS-BTGB

RIR

RIPE NCC

Country

Allocated

1993-12-22

RPKI Validity

Total ROAs

2,897

Valid Prefixes

351

NotFound

160

Announced (BGP)

511

RPKI Coverage

68.7%

Geographic Footprint

Countries where this AS's scanned IPs are geolocated, by open-IP count.

454,258

261

125

Top Open Ports

Most common open ports across IPs in this AS (last 30 days).

Port	Open IPs
7547	151,190
4567	3,632
443	2,935
1024	2,560
80	2,407
37777	1,723
60000	1,604
40000	1,511
554	1,262
8000	1,208
1723	1,114
1025	612
1194	509
32400	494
8443	493

Upstreams

AS5400

AS25180

AS56595

AS57304