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

21,561

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.

454,122

261

125

Top Open Ports

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

Port	Open IPs
7547	151,052
4567	3,631
443	2,930
1024	2,557
80	2,401
37777	1,720
60000	1,602
40000	1,510
554	1,261
8000	1,207
1723	1,112
1025	611
1194	508
32400	493
8443	492

Upstreams

AS5400

AS25180

AS56595

AS57304