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Autonomous System

AS6871

British Telecommunications Limited

Announced IPs
2,097,664
CIDR prefixes
104
ASN
AS6871

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

70/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Network profile

Source: PeeringDB →
Network type Cable/DSL/ISP
Traffic level 300-500Gbps
Geographic scope Europe
Traffic ratio Mostly Inbound
Peering policy Open
IRR record AS-PLUSNETUK

Web3 footprint

AS6871 hosts 2 observed decentralized-network nodes across 1 network. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.

AS6871 — global IP footprint

Cities where AS6871 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.

View on 3D globe →

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
31.108.0.0/14 262.1K
0.0%
British Telecommunications PLC GB England Bolton
87.112.0.0/14 262.1K
24.9%
British Telecommunications PLC GB England Halifax
51.6.0.0/15 131.1K
99.4%
British Telecommunications PLC GB England Fareham
84.92.0.0/15 131.1K
41.2%
British Telecommunications PLC GB England Slough
87.112.0.0/15 131.1K
0.0%
British Telecommunications PLC GB England Manchester
146.198.0.0/15 131.1K
100.0%
British Telecommunications PLC GB England Crewe
31.125.0.0/16 65.5K
25.5%
British Telecommunications PLC GB England Brent
46.208.0.0/16 65.5K
94.2%
British Telecommunications PLC GB England Swindon
51.9.0.0/16 65.5K
99.8%
British Telecommunications PLC GB England Manchester
80.189.0.0/16 65.5K
97.5%
British Telecommunications PLC GB England Bristol
80.229.0.0/16 65.5K
43.2%
British Telecommunications PLC GB England Sheffield
87.114.0.0/16 65.5K
0.0%
British Telecommunications PLC GB England Halifax
91.125.0.0/16 65.5K
100.0%
British Telecommunications PLC GB England Uckfield
143.159.0.0/16 65.5K
94.4%
British Telecommunications PLC US
146.90.0.0/16 65.5K
99.4%
British Telecommunications PLC GB England Dunstable
146.198.0.0/16 65.5K
100.0%
British Telecommunications PLC US
146.200.0.0/16 65.5K
99.6%
British Telecommunications PLC US
147.147.0.0/16 65.5K
99.4%
British Telecommunications PLC GB England Great Missenden
150.143.0.0/16 65.5K
97.6%
British Telecommunications PLC US
195.213.0.0/16 65.5K
99.0%
British Telecommunications PLC GB England Welwyn
209.93.0.0/16 65.5K
93.9%
British Telecommunications PLC US
213.31.0.0/16 65.5K
97.0%
British Telecommunications PLC GB England Bristol
31.185.128.0/17 32.8K
0.0%
British Telecommunications PLC GB England Purley
81.174.128.0/17 32.8K
48.0%
British Telecommunications PLC GB England Sheffield
87.115.128.0/17 32.8K
99.9%
British Telecommunications PLC GB England Cirencester
91.125.128.0/17 32.8K
100.0%
British Telecommunications Limited GB England Weston-super-Mare
146.199.0.0/17 32.8K
100.0%
British Telecommunications PLC US
212.159.0.0/17 32.8K
43.6%
British Telecommunications PLC GB Wales Cardiff
37.152.192.0/18 16.4K
0.0%
British Telecommunications PLC GB England Hartlepool
84.51.128.0/18 16.4K
60.3%
British Telecommunications PLC GB England Twickenham
87.115.0.0/18 16.4K
98.4%
British Telecommunications PLC GB England Worcester
91.125.0.0/18 16.4K
100.0%
British Telecommunications Limited GB England Sutton Coldfield
146.199.192.0/18 16.4K
100.0%
British Telecommunications PLC US
212.56.64.0/18 16.4K
16.6%
British Telecommunications PLC GB England Tottenham
31.185.32.0/19 8.2K
0.0%
British Telecommunications PLC GB England Wallingford
83.216.128.0/19 8.2K
78.3%
British Telecommunications PLC GB Scotland Aberdeen
87.115.96.0/19 8.2K
100.0%
British Telecommunications PLC GB England Spalding
91.125.64.0/19 8.2K
100.0%
British Telecommunications Limited GB England Belper
146.66.32.0/19 8.2K
0.0%
British Telecommunications PLC GB England Rotherham
146.199.160.0/19 8.2K
100.0%
British Telecommunications PLC US
194.75.0.0/19 8.2K
99.4%
British Telecommunications PLC GB England Catford
195.99.32.0/19 8.2K
93.3%
British Telecommunications PLC GB England Wirral
195.166.128.0/19 8.2K
33.8%
British Telecommunications PLC GB England Preston
212.140.0.0/19 8.2K
99.8%
British Telecommunications PLC GB
213.162.96.0/19 8.2K
59.8%
British Telecommunications PLC GB England Doncaster
87.115.64.0/20 4.1K
100.0%
British Telecommunications PLC GB England Ellesmere Port
91.125.112.0/20 4.1K
100.0%
British Telecommunications Limited GB England Barrow in Furness
146.199.128.0/20 4.1K
100.0%
British Telecommunications PLC US
194.75.80.0/20 4.1K
99.4%
British Telecommunications PLC GB Wales Wrexham
195.99.224.0/20 4.1K
93.3%
British Telecommunications PLC GB England Cheltenham
212.140.32.0/20 4.1K
99.7%
British Telecommunications PLC GB
217.32.32.0/20 4.1K
100.0%
British Telecommunications PLC GB England Abingdon
217.39.16.0/20 4.1K
85.3%
British Telecommunications PLC GB England Radcliffe
217.39.112.0/20 4.1K
78.5%
British Telecommunications PLC GB England Peterborough
217.45.96.0/20 4.1K
98.6%
British Telecommunications PLC GB England Potters Bar
217.46.128.0/20 4.1K
98.4%
British Telecommunications PLC GB Wales Swansea
87.115.88.0/21 2.0K
99.9%
British Telecommunications PLC GB England Leeds
91.125.96.0/21 2.0K
100.0%
British Telecommunications Limited GB England Enfield
146.199.144.0/21 2.0K
100.0%
British Telecommunications PLC US
195.99.8.0/21 2.0K
92.7%
British Telecommunications PLC GB England Downham Market
195.99.88.0/21 2.0K
93.6%
British Telecommunications PLC GB England East Grinstead
212.140.48.0/21 2.0K
0.2%
British Telecommunications PLC GB
217.32.152.0/21 2.0K
75.9%
British Telecommunications PLC GB England Bury St Edmunds
217.45.24.0/21 2.0K
98.7%
British Telecommunications PLC GB England Fakenham
87.115.80.0/22 1.0K
100.0%
British Telecommunications PLC GB England Chelmsford
91.125.108.0/22 1.0K
100.0%
British Telecommunications Limited GB England Welwyn
146.199.152.0/22 1.0K
100.0%
British Telecommunications PLC US
194.75.220.0/22 1.0K
99.4%
British Telecommunications PLC GB Scotland Alloa
217.32.112.0/22 1.0K
100.0%
British Telecommunications PLC GB England Calne
217.32.148.0/22 1.0K
86.6%
British Telecommunications PLC GB Scotland Paisley
217.32.160.0/22 1.0K
77.4%
British Telecommunications PLC GB England Bournemouth
217.32.176.0/22 1.0K
78.7%
British Telecommunications PLC GB Wales Wrexham
217.46.24.0/22 1.0K
98.6%
British Telecommunications PLC GB
87.115.86.0/23 512
100.0%
British Telecommunications PLC GB England Wantage
91.125.104.0/23 512
100.0%
British Telecommunications Limited GB Northern Ireland Lisburn
146.199.156.0/23 512
100.0%
British Telecommunications PLC US
217.32.30.0/23 512
100.0%
British Telecommunications PLC GB
87.115.85.0/24 256
100.0%
British Telecommunications PLC GB England Norwich
91.125.106.0/24 256
100.0%
British Telecommunications Limited GB England Stamford
146.199.159.0/24 256
100.0%
British Telecommunications PLC US
87.115.84.0/25 128
100.0%
British Telecommunications PLC GB England Ashby-de-la-Zouch
91.125.107.0/25 128
100.0%
British Telecommunications Limited GB England Poulton-le-Fylde
146.199.158.0/25 128
100.0%
British Telecommunications PLC US
87.115.84.128/26 64
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.128/26 64
100.0%
British Telecommunications Limited GB Scotland Cowie
146.199.158.128/26 64
100.0%
British Telecommunications PLC US
87.115.84.224/27 32
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.192/27 32
100.0%
British Telecommunications Limited GB Scotland Cowie
146.199.158.192/27 32
100.0%
British Telecommunications PLC US
87.115.84.192/28 16
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.224/28 16
100.0%
British Telecommunications Limited GB Scotland Cowie
146.199.158.240/28 16
100.0%
British Telecommunications PLC US
87.115.84.216/29 8
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.240/29 8
100.0%
British Telecommunications Limited GB Scotland Cowie
146.199.158.232/29 8
100.0%
British Telecommunications PLC US
87.115.84.208/30 4
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.252/30 4
100.0%
British Telecommunications Limited GB Scotland Cowie
146.199.158.224/30 4
100.0%
British Telecommunications PLC US
87.115.84.214/31 2
100.0%
British Telecommunications PLC GB Scotland Dunbar
91.125.107.250/31 2
100.0%
British Telecommunications Limited GB Scotland Cowie

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS6871 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
31.125.0.0/16 9,304 2026-09-10 12:05:09
146.90.0.0/16 9,244 2026-09-10 12:05:09
194.75.80.0/20 9,206 2026-09-10 12:05:09
195.99.32.0/19 9,200 2026-09-10 12:05:09
87.114.0.0/16 9,149 2026-09-10 12:05:09
147.147.0.0/16 9,100 2026-09-10 12:05:09
212.56.64.0/18 9,050 2026-09-10 12:05:09
194.75.220.0/22 9,019 2026-09-10 12:05:09
212.140.48.0/21 8,946 2026-09-10 12:05:09
195.99.224.0/20 8,943 2026-09-10 12:05:09
217.32.176.0/22 8,929 2026-09-10 12:05:09
84.92.0.0/15 8,917 2026-09-10 12:05:09
37.152.192.0/18 8,915 2026-09-10 12:05:09
212.140.32.0/20 8,910 2026-09-10 12:05:09
213.162.96.0/19 8,907 2026-09-10 12:05:09
217.32.30.0/23 8,903 2026-09-10 12:05:09
87.112.0.0/16 8,895 2026-09-10 12:05:09
212.140.0.0/19 8,884 2026-09-10 12:05:09
213.31.0.0/16 8,866 2026-09-10 12:05:09
217.45.24.0/21 8,853 2026-09-10 12:05:09
217.39.16.0/20 8,842 2026-09-10 12:05:09
195.166.128.0/19 8,820 2026-09-10 12:05:09
217.32.32.0/20 8,726 2026-09-10 12:05:09
212.159.8.0/23 8,700 2026-09-10 12:05:09
217.45.96.0/20 8,676 2026-09-10 12:05:09
51.9.0.0/16 8,639 2026-09-10 12:05:09
146.66.32.0/19 8,625 2026-09-10 12:05:09
31.185.32.0/19 8,604 2026-09-10 12:05:09
195.99.88.0/21 8,537 2026-09-10 12:05:09
217.46.128.0/20 8,536 2026-09-10 12:05:09
80.189.0.0/16 8,521 2026-09-10 12:05:09
31.108.0.0/14 8,506 2026-09-10 12:05:09
212.159.64.0/18 8,501 2026-09-10 12:05:09
31.185.128.0/17 8,501 2026-09-10 12:05:09
80.229.0.0/16 8,489 2026-09-10 12:05:09
217.32.160.0/22 8,484 2026-09-10 12:05:09
87.115.0.0/16 8,480 2026-09-10 12:05:09
212.159.32.0/19 8,478 2026-09-10 12:05:09
83.216.128.0/19 8,451 2026-09-10 12:05:09
194.75.0.0/19 8,451 2026-09-10 12:05:09
46.208.0.0/16 8,430 2026-09-10 12:05:09
143.159.0.0/16 8,430 2026-09-10 11:49:34
84.51.128.0/18 8,426 2026-09-10 12:05:09
217.39.112.0/20 8,419 2026-09-10 12:05:09
212.159.0.0/19 8,413 2026-09-10 12:05:09
195.99.8.0/21 8,411 2026-09-10 12:05:09
81.174.128.0/17 8,411 2026-09-10 12:05:09
91.125.0.0/16 8,400 2026-09-10 12:05:09
195.213.0.0/16 8,395 2026-09-10 12:05:09
217.32.152.0/21 8,366 2026-09-10 12:05:09

Showing top 50 of 61 announced prefixes by sample volume.

Frequently Asked Questions

What is AS6871?

AS6871 is an Autonomous System Number assigned to British Telecommunications Limited. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS6871 announce?

AS6871 announces 2.10M IPv4 addresses distributed across 104 routed CIDR prefixes. The network is registered in United Kingdom.

Who operates AS6871?

AS6871 is operated by British Telecommunications Limited. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.

What country is AS6871 registered in?

AS6871 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-10 12:39:05 UTC
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