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

21,532

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

2,465

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.

452,801

261

125

Top Open Ports

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

Port	Open IPs
7547	149,918
4567	3,602
443	2,915
1024	2,538
80	2,385
37777	1,705
60000	1,591
40000	1,499
554	1,251
8000	1,197
1723	1,106
1025	606
1194	505
8443	489
32400	487

Upstreams

AS5400

AS25180

AS56595

AS57304