AS6871 British Telecommunications Limited

AS6871British Telecommunications LimitedFAI

WHOIS Topology

United Kingdom · RIPE NCCplus.net

Home broadbandTor relays

IPv4 addresses

2 097 664

61 announced prefixes

IPv6 addresses

7.13 × 10²⁹

2 announced prefixes

BGP neighbours

…

CAIDA rank

#12 919

Customer cone 1 ASNs

Estimated users

1,78 M

APNIC: 1,78 M

RPKI

90% valid

0 invalid · 6 not covered

Average purity

419 sampled IPs

IXPs / facilities

0 / 0

Operator self-reported

History

How prefixes were announced and changed hands, registration changes, and outage or hijack incidents.

Loading routing history…

IP ranges

Currently announced prefixes with their RIR registration and geolocation.

Prefix	RPKI	Registration	Geolocation	Addresses
31.108.0.0/14	Valid	UK-TM-20101125RIPE	Darwen	262 144
51.6.0.0/15	Valid	UK-FORCE9RIPE	Oban	131 072
84.92.0.0/15	Valid	UK-BT-20040518RIPE	Hammersmith	131 072
31.125.0.0/16	Valid	EE4RIPE	City of Westminster	65 536
46.208.0.0/16	Valid	UK-BT-20101201RIPE	Chapel en le Frith	65 536
51.9.0.0/16	Valid	FORCE9RIPE	Helensburgh	65 536
80.189.0.0/16	Valid	UK-BT-20020708RIPE	Redruth	65 536
80.229.0.0/16	Valid	UK-BT-20031017RIPE	Sheffield	65 536
87.112.0.0/16	Valid	UK-BT-20050729RIPE	Manchester	65 536
87.113.0.0/16	Valid	UK-BT-20050729RIPE	United Kingdom	65 536
87.114.0.0/16	Valid	UK-BT-20050729RIPE	Preston	65 536
87.115.0.0/16	Valid	UK-BT-20050729RIPE	Radstock	65 536
91.125.0.0/16	Valid	UK-BT-20061009RIPE	Keighley	65 536
143.159.0.0/16	Not found	—	Peterborough	65 536
146.90.0.0/16	Valid	UK-BT-20110711RIPE	Hexham	65 536
146.198.0.0/16	Not found	—	Carmarthen	65 536
146.199.0.0/16	Not found	—	Marlborough	65 536
146.200.0.0/16	Not found	—	Dalkeith	65 536
147.147.0.0/16	Valid	BTRIPE	Chesham	65 536
150.143.0.0/16	Not found	—	Sheffield	65 536

/24 block profile

One square per /24: colour shows the risk type, shade how many addresses are flagged, stripes mark datacenter blocks. Click a square to see all 256 addresses.

/24s with data 413 / 8 194 （5%） · flagged 23

No risk flagsDatacenter (no flags)ProxyVPNAbuse / blocklistTorDarker = more flagged addresses; dashed = block screen only

51.6.0.0/1548/512 with data · 2 flagged

195.213.0.0/1630/256 with data · 1 flagged

146.199.0.0/1626/256 with data · 3 flagged

143.159.0.0/1625/256 with data · 4 flagged

31.108.0.0/1424/1024 with data · 2 flagged

146.90.0.0/1624/256 with data · 0 flagged

51.9.0.0/1621/256 with data · 1 flagged

87.115.0.0/1620/256 with data · 2 flagged

146.198.0.0/1619/256 with data · 0 flagged

91.125.0.0/1618/256 with data · 1 flagged

147.147.0.0/1617/256 with data · 1 flagged

46.208.0.0/1615/256 with data · 0 flagged

Hover a square for its numbers; click to see all 256 addresses.

Each prefix shows its 64 /24s with the most data. Built daily from lookups, neighbour sampling, public lists and block screening.

IP reputation

IPs from this network that CleanIP has analysed: purity, abuse reports and the riskiest /24 blocks.

Purity distribution

85–100 21070–84 19450–69 150–49 0

0.10%

Share of IPv4 reported or blocklisted

2 031

Listed IPs

419

Analysed IPs

Riskiest /24 blocks

/24 block	Flagged	Analysed
143.159.106.0/24	1	1
147.147.54.0/24	1	1
195.213.79.0/24	1	1
51.7.136.0/24	1	1
81.174.144.0/24	1	1

Flagged = VPN, proxy, Tor or purity below 50. Samples come from user lookups and neighbour sampling, not every address in this network.

Geography

Where this network’s IPv4 addresses are located.

United Kingdom100.0%

Scope: Single country
In registered country: 100.0%

Estimated by sampling IPv4 ranges against a geolocation database.

Observation du trafic

AS6871 · 7 derniers jours

Robot vs humain

Humain85.8%Robot14.2%

Adoption et usage

Adoption et usage des principaux protocoles

Version du protocole Internet (IP)

IPv4> 99.9%IPv6< 0.1%

Version HTTP

HTTP/1.x

13.3%HTTP/2

57.3%HTTP/3

29.4%

HTTP vs HTTPS

98.7% HTTPS (chiffré)

HTTP en clair 1.3%

Version TLS

TLS 1.0/1.1< 0.1%TLS 1.25.7%TLS 1.364.5%QUIC29.8%

Annonces BGP

Annonces de routes BGP par heure sur les 7 derniers jours

231 033

Total sur 7 jours

17 382

Pic horaire

Données : Cloudflare Radar, sous licence CC BY-NC 4.0

Activity

Hourly traffic over the last 7 days, normalized to this network’s peak.

A pronounced day/night rhythm, typical of networks with human users.

	00						06						12						18
Mon
Tue
Wed
Thu
Fri
Sat
Sun

Times in UTCLessMore

Peak hour: 19:00–20:00
Active hours: 16 hrs
Weekend vs weekday: Weekdays ≈ weekends
Busiest day: Sun

Chargement…

Opérateurs amont et voisins BGP

AS6871Page dédiée

Chargement des opérateurs amont et des voisins…

WHOIS record

The registry’s record for this AS number: holder, status, dates and contacts.

Sources

Where the information on this page comes from and when it was updated.

Information	Source	Updated
Registered country	RIR daily delegation statistics	2026-10-22
Registered address & allocation date	RIR registration data (RDAP)	2026-10-03
Organization & company country	AS-to-organization data	2026-10-21
Network type	CleanIP ASN canon	2026-10-22
Exchanges & facilities	Operator self-reported interconnection data	2026-10-21
Announced prefixes & BGP neighbours	Public BGP routing data	2026-10-22
IPv4 geography	Geolocation database	—
RPKI validation	RPKI ROA validation data	2026-10-22
Rank & customer cone	CAIDA AS Rank	2026-10-01
Estimated users (APNIC)	APNIC Labs user estimates	2026-10-20
Network tags	Public routing data community tags	2026-10-22
IP reputation	CleanIP lookups and neighbour sampling	—

Le démarrage de la page prend plus de temps que prévu. Certaines ressources n'ont peut-être pas été chargées. Essayez de recharger la page.

Recharger la page

Recoupement multisource · Données de réputation internes · Uniquement des données réelles