AS2856 British Telecommunications 🇬🇧 GB
British Telecommunications Limited. Announcing 552 prefixes, seen at the RIS collectors.
IPv4 prefixes
545
18,501,888 (72,273 × /24)
IPv6 prefixes
7
136 × /32
Upstreams
3
transit providers observed
Peers
10
settlement-free adjacencies
Downstreams
149
transit customers observed
Customer cone
161
ASes reachable through it
Registry and operator data
- AS number
- AS2856
- Name
- British Telecommunications
- Organisation
- BTnet (BT's UK IP Network - AS2856)
- Country
- 🇬🇧 GB
- RIR
- RIPENCC
- Allocated
- 1993-12-22
- Network type
- NSP
- Traffic levels
- 1-5Tbps
- Scope
- Regional
- Peering policy
- Selective
- IRR as-set
- RIPE::AS-BTGB
- Website
- http://www.bt.net
- PeeringDB
- net/281
- Exchanges
- 2
- Facilities
- 3
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
7 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 2001:4878:c259::/48 v6 | RPKI valid | 32 | 176392856 | 2026-09-18 |
| 2a00:2380::/25 v6 | RPKI valid | 32 | 176392856 | 2026-09-18 |
| 2a01:4c8::/29 v6 | RPKI valid | 32 | 176392856 | 2026-09-18 |
| 2a01:4c8:f400::/48 v6 | RPKI valid | 32 | 176392856 | 2026-09-18 |
| 2a01:4c8:f401::/48 v6 | RPKI valid | 32 | 176392856 | 2026-09-18 |
| 2a02:ee80:4176::/47 v6 | no ROA | 13 | 176392856 | 2026-09-18 |
| 2a03:1e82:90ff::/48 v6 | no ROA | 32 | 176392856 | 2026-09-18 |