HomeASN LookupAS2856

AS2856

🇬🇧

BT-UK-AS British Telecommunications PLCORG-BPIS1-RIPE

BTnet UK Regional network

RIPENCCallocated
Announced Prefixes (BGP)
497total
490 IPv47 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)16.2M
Announced (BGP)18.4M
IPv6 Addresses ⓘ
Allocated (RIR)1×10^31
Announced (BGP)1×10^31
Prefix Limit (IPv4)
20,000
Prefix Limit (IPv6)
50
Country
🇬🇧 GB
RIR
RIPENCC
Status
allocated
Allocated
12/22/1993

Announced Prefixes

(BGP)496
|
Prefix
RPKI
IRR
Last Seen
5.35.192.0/21
 Valid
RIPE
7/11/2026
5.80.0.0/15
 Valid
RIPE
7/11/2026
5.81.0.0/16
 Valid
RIPE
7/11/2026
5.181.136.0/24
No ROA
RIPE
7/11/2026
9.151.0.0/19
 Valid
RIPE
7/11/2026
9.151.208.0/20
 Valid
RIPE
7/11/2026
9.151.248.0/21
 Valid
RIPE
7/11/2026
9.237.96.0/19
 Valid
RIPE
7/11/2026
9.237.192.0/19
 Valid
RIPE
7/11/2026
15.145.20.0/22
No ROA
RADB
7/11/2026
1–10 of 496
1 / 50

Allocated Prefixes

(RIR)293
Prefix
Country
RIR
Status
5.35.192.0/21🇺🇸 USRIPENCCallocated
5.80.0.0/15🇬🇧 GBRIPENCCallocated
5.81.0.0/16🇬🇧 GBRIPEassigned
9.151.0.0/19🇬🇧 GBRIPEassigned
9.151.208.0/20🇬🇧 GBRIPEassigned
9.151.248.0/21🇬🇧 GBRIPEassigned
9.237.96.0/19🇬🇧 GBRIPEassigned
9.237.192.0/19🇬🇧 GBRIPEassigned
31.48.0.0/13🇬🇧 GBRIPENCCallocated
31.90.0.0/15🇬🇧 GBRIPENCCallocated
1–10 of 293
1 / 30

Downstream Customers(3)

ASNName
AS9011🇬🇧The Patent Office
AS15248🇺🇸METASWITCH-AS1 - Metaswitch Networks Corp.
AS197545🇬🇧Era4-ASN Era4 Limited
ASPA
No ASPA0 upstreams, 3 downstreams
Listed as Upstream Provider by
3 ASNs
View full ASPA details →
Abuse Contact
External Links
RIPE WhoisHurricane Electric BGPRIPEstatPeeringDB
API
Open
GEThttps://api.ipctl.io/v1/asn/2856

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/2856" | jq