2a01:4c8:f400::/48 RPKI valid

BTnet (BT's UK IP Network - AS2856) · Updated 21.10.2026 21:15 UTC

Announced IPv6 AS2856 BTnet (BT's UK IP Network - AS2856)

Network Information

Prefix: 2a01:4c8:f400::/48
Network Description:: —
Address range: 2a01:4c8:f400:: – 2a01:4c8:f400:ffff:ffff:ffff:ffff:ffff
Size: 65,536 × /64
Origin AS: AS2856 BTnet (BT's UK IP Network - AS2856)
Organization: BTnet (BT's UK IP Network - AS2856)
AS path: AS208972AS9121AS5400AS2856
Paths seen: 1
RPKI: RPKI valid
Location: United Kingdom
First seen: 21.10.2026

RPKI ROAs

ROA prefix	Max length	Origin AS	Trust anchor
2a01:4c8::/29	/29	AS2856	RIPE
2a01:4c8:f400::/48	/48	AS2856	RIPE	Matches

Prefix	Origin AS	Description	Location	RPKI
2a01:4c8::/29	AS2856		Harrow	RPKI valid

None in the routing table.

Prefix	Origin AS	Description	Location	RPKI
5.35.192.0/21	AS2856		City of London	RPKI valid
5.80.0.0/15	AS2856		Gloucester	RPKI valid
5.81.0.0/16	AS2856	BT Infrastructure Layer	Royal Tunbridge Wells	RPKI valid
5.181.136.0/24	AS2856			No ROA
9.151.0.0/19	AS2856		City of London	RPKI valid
9.151.208.0/20	AS2856			RPKI valid
9.151.248.0/21	AS2856		City of London	RPKI valid
9.232.192.0/18	AS2856			RPKI valid
9.233.48.0/20	AS2856		City of London	RPKI valid
9.237.96.0/19	AS2856		City of London	RPKI valid
9.237.128.0/18	AS2856		City of London	RPKI valid
9.237.192.0/19	AS2856			RPKI valid
15.145.20.0/22	AS2856		Manchester	No ROA
23.26.70.0/24	AS2856		City of London	RPKI valid
23.26.108.0/24	AS2856		City of London	RPKI valid
23.26.117.0/24	AS2856		City of London	RPKI valid
23.26.131.0/24	AS2856		City of London	RPKI valid
23.26.192.0/24	AS2856		City of London	RPKI valid
23.27.32.0/24	AS2856		City of London	RPKI valid
23.27.33.0/24	AS2856		City of London	RPKI valid
23.27.34.0/24	AS2856		City of London	RPKI valid
23.27.35.0/24	AS2856		City of London	RPKI valid
23.27.36.0/24	AS2856		City of London	RPKI valid
23.27.37.0/24	AS2856		City of London	RPKI valid
23.27.38.0/24	AS2856		City of London	RPKI valid
23.27.39.0/24	AS2856		City of London	RPKI valid
23.27.40.0/24	AS2856		City of London	RPKI valid
23.27.102.0/24	AS2856		City of London	RPKI valid
23.27.103.0/24	AS2856		City of London	RPKI valid
23.27.104.0/24	AS2856		City of London	RPKI valid
23.27.105.0/24	AS2856		City of London	RPKI valid
23.27.106.0/24	AS2856		City of London	RPKI valid
23.27.107.0/24	AS2856		City of London	RPKI valid
23.27.108.0/24	AS2856		City of London	RPKI valid
23.230.82.0/23	AS2856		London	RPKI valid
23.230.242.0/24	AS2856		City of London	RPKI valid
23.230.252.0/24	AS2856		City of London	RPKI valid
31.48.0.0/13	AS2856		Crawley	RPKI valid
31.90.0.0/15	AS2856			RPKI valid
31.92.0.0/15	AS2856		Royal Tunbridge Wells	RPKI valid
31.94.0.0/16	AS2856		Newport	RPKI valid
31.96.0.0/16	AS2856	BT Retail	Camden	RPKI valid
31.100.0.0/14	AS2856			RPKI valid
31.104.0.0/16	AS2856	BT-CENTRAL-PLUS	Pontefract	RPKI valid
31.106.0.0/15	AS2856			RPKI valid
31.112.0.0/14	AS2856		Preston	RPKI valid
31.116.0.0/14	AS2856			RPKI valid
31.116.0.0/16	AS2856			RPKI valid
31.117.0.0/16	AS2856		Islington	RPKI valid
31.118.0.0/16	AS2856		Harlesden	RPKI valid
31.119.0.0/16	AS2856	BTnet Assignments	Winsford	RPKI valid
31.120.0.0/16	AS2856		Grimsby	RPKI valid
31.121.0.0/16	AS2856	BTnet Assignments	Bedford	RPKI valid
31.122.0.0/15	AS2856			RPKI valid
31.124.0.0/16	AS2856		Stockport	RPKI valid
31.126.0.0/15	AS2856		Liverpool	RPKI valid
31.130.240.0/23	AS2856	Volta Central London's Data Centre	London	RPKI valid
37.44.229.0/24	AS2856			RPKI valid
37.44.230.0/24	AS2856			RPKI valid
37.44.231.0/24	AS2856			RPKI valid
37.97.112.0/22	AS2856	Volta Central London's Data Centre	London	RPKI valid
37.143.0.0/22	AS2856		Miami	RPKI valid
37.230.61.0/24	AS2856		London	RPKI valid
40.27.28.0/24	AS2856		Newport	RPKI valid
40.27.72.0/24	AS2856		Newport	RPKI valid
45.39.116.0/24	AS2856		City of London	RPKI valid
45.39.188.0/24	AS2856		City of London	RPKI valid
45.149.7.0/24	AS2856	xTom	London	RPKI valid
45.149.168.0/23	AS2856		London	RPKI valid
45.149.170.0/23	AS2856			RPKI valid
46.68.0.0/15	AS2856			RPKI valid
46.68.66.0/24	AS2856	Orange PCS GPRS Services		RPKI valid
46.248.96.0/22	AS2856		Islington	RPKI valid
46.248.102.0/23	AS2856		Islington	RPKI valid
46.248.104.0/23	AS2856		Islington	RPKI valid
46.248.120.0/22	AS2856		Islington	RPKI valid
50.117.7.0/24	AS2856		City of London	RPKI valid
50.117.51.0/24	AS2856		City of London	RPKI valid
50.118.154.0/23	AS2856		London	RPKI valid
51.14.0.0/16	AS2856	BT-CENTRAL-PLUS	Birmingham	RPKI valid
51.64.32.0/24	AS2856			No ROA
51.64.34.0/24	AS2856			No ROA
51.64.35.0/24	AS2856			No ROA
51.146.44.0/22	AS2856		Reading	RPKI valid
51.146.128.0/22	AS2856		London	RPKI valid
51.146.136.0/22	AS2856		London	RPKI valid
51.146.235.0/24	AS2856		Northwich	RPKI valid
51.146.252.0/22	AS2856			RPKI valid
51.149.18.0/24	AS2856		Croydon	No ROA
51.149.19.0/24	AS2856		Croydon	No ROA
51.194.36.0/23	AS2856		Birmingham	RPKI valid
51.194.100.0/22	AS2856			RPKI valid
51.230.0.0/20	AS2856		Thamesmead	No ROA
51.230.16.0/20	AS2856		Thornton Heath	No ROA
51.230.32.0/20	AS2856		Birkenhead	No ROA
51.230.48.0/20	AS2856		Portsmouth	No ROA
51.230.64.0/20	AS2856		Bootle	No ROA
51.230.80.0/20	AS2856		Bristol	No ROA
51.230.96.0/20	AS2856		Banbury	No ROA
51.230.112.0/20	AS2856		Tottenham	No ROA
51.230.255.0/24	AS2856			No ROA
51.241.3.0/24	AS2856		London	RPKI valid
51.241.201.0/24	AS2856		London	RPKI valid
62.6.0.0/16	AS2856	PROVIDER		RPKI valid
62.7.0.0/16	AS2856	PROVIDER		RPKI valid
62.172.0.0/16	AS2856			RPKI valid
62.192.124.0/23	AS2856		London	RPKI valid
62.239.0.0/16	AS2856			RPKI valid
62.244.11.0/24	AS2856			RPKI valid
62.244.12.0/24	AS2856			RPKI valid
62.244.29.0/24	AS2856			RPKI valid
62.244.36.0/24	AS2856			RPKI valid
62.244.37.0/24	AS2856			RPKI valid
62.244.41.0/24	AS2856			RPKI valid
62.244.43.0/24	AS2856			RPKI valid
62.244.45.0/24	AS2856			RPKI valid
62.244.56.0/24	AS2856			RPKI valid
64.205.136.0/22	AS2856			RPKI valid
64.205.144.0/22	AS2856		Tipton	RPKI valid
72.9.180.0/22	AS2856			RPKI valid
77.90.135.0/24	AS2856	www.rapidnet.de		RPKI valid
77.90.138.0/24	AS2856	ipv4buyers.com		RPKI valid
77.90.151.0/24	AS2856	ipv4buyers.com		RPKI valid
77.90.164.0/24	AS2856	CONTRUST SOLUTIONS S.R.L.		RPKI valid
77.94.224.0/24	AS2856	EU-NISSAN-BIZ-SUN	Sunderland	RPKI valid
78.105.97.0/24	AS2856			RPKI valid
78.105.136.0/22	AS2856		Southall	RPKI valid
78.105.151.0/24	AS2856		Chelmsford	RPKI valid
78.105.175.0/24	AS2856			RPKI valid
78.105.179.0/24	AS2856			RPKI valid
78.105.188.0/24	AS2856		Sunderland	RPKI valid
78.105.191.0/24	AS2856		Sunderland	RPKI valid
78.105.194.0/24	AS2856		Chiddingfold	RPKI valid
78.105.198.0/24	AS2856			RPKI valid
78.105.200.0/24	AS2856		Brighton	RPKI valid
78.105.202.0/24	AS2856		Worthing	RPKI valid
79.132.64.0/24	AS2856			RPKI valid
79.132.65.0/24	AS2856			RPKI valid
79.139.52.0/23	AS2856		Bolton	RPKI valid
79.139.54.0/23	AS2856		Bolton	RPKI valid
80.81.58.0/24	AS2856		City of London	RPKI valid
81.128.0.0/11	AS2856		Nottingham	RPKI valid
81.128.0.0/12	AS2856	BT Infrastructure Layer	Nottingham	RPKI valid
81.161.52.0/22	AS2856	Volta Central London's Data Centre	London	RPKI valid
82.38.9.0/24	AS2856		London	RPKI valid
82.38.56.0/22	AS2856			RPKI valid
82.39.173.0/24	AS2856		London	RPKI valid
82.41.112.0/22	AS2856			RPKI valid
82.108.4.0/22	AS2856			RPKI valid
82.108.32.0/21	AS2856			RPKI valid
82.108.44.0/22	AS2856			RPKI valid
82.108.52.0/22	AS2856		London	RPKI valid
82.108.68.0/22	AS2856			RPKI valid
82.108.88.0/23	AS2856		London	RPKI valid
82.108.92.0/22	AS2856		London	RPKI valid
82.108.102.0/23	AS2856		London	RPKI valid
82.108.116.0/22	AS2856			RPKI valid
82.108.140.0/22	AS2856		London	RPKI valid
82.108.152.0/23	AS2856		London	RPKI valid
82.136.54.0/23	AS2856			RPKI valid
82.140.134.0/24	AS2856			RPKI valid
82.140.138.0/24	AS2856			RPKI valid
82.140.143.0/24	AS2856			RPKI valid
82.140.170.0/24	AS2856			RPKI valid
82.153.33.0/24	AS2856			RPKI valid
82.153.85.0/24	AS2856			RPKI valid
82.153.88.0/24	AS2856			RPKI valid
82.153.179.0/24	AS2856			RPKI valid
82.153.181.0/24	AS2856			RPKI valid
82.153.190.0/24	AS2856			RPKI valid
82.153.238.0/24	AS2856			RPKI valid
83.223.153.0/24	AS2856			RPKI valid
83.223.154.0/24	AS2856			RPKI valid
83.245.16.0/21	AS2856		London	RPKI valid
83.245.24.0/22	AS2856		London	RPKI valid
84.23.0.0/19	AS2856			No ROA
84.46.177.0/24	AS2856			RPKI valid
84.46.181.0/24	AS2856			RPKI valid
84.46.183.0/24	AS2856			RPKI valid
84.46.188.0/24	AS2856			RPKI valid
84.46.190.0/24	AS2856			RPKI valid
84.46.191.0/24	AS2856			RPKI valid
84.46.194.0/24	AS2856			RPKI valid
84.55.17.0/24	AS2856			RPKI valid
84.55.22.0/24	AS2856		London	RPKI valid
85.88.224.0/20	AS2856			No ROA
85.88.240.0/23	AS2856	Belfast, United Kingdom		No ROA
85.189.72.0/23	AS2856		London	RPKI valid
85.189.74.0/23	AS2856		London	RPKI valid
85.189.76.0/23	AS2856		London	RPKI valid
85.189.78.0/23	AS2856		London	RPKI valid
85.189.132.0/23	AS2856		London	RPKI valid
85.189.153.0/24	AS2856		London	RPKI valid
85.189.154.0/23	AS2856		London	RPKI valid
85.189.156.0/24	AS2856		London	RPKI valid
85.189.159.0/24	AS2856		London	RPKI valid
85.189.160.0/24	AS2856		London	RPKI valid
85.189.162.0/24	AS2856		London	RPKI valid
85.189.164.0/23	AS2856		London	RPKI valid
85.189.167.0/24	AS2856		London	RPKI valid

200 / 542

Origin AS

Details →

AS: AS2856
Name: BTnet (BT's UK IP Network - AS2856)
Also Known As:: British Telecommunications
Website: http://www.bt.net
Prefixes: 537 IPv4 · 6 IPv6
Peers: 105 (1 Upstreams)

Approximate location

GeoLite2

External links

RIPEstat bgp.tools Hurricane Electric IRR Explorer Looking Glass JSON API