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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 v1.1.0 — 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 1 observed decentralized-network node 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 Norwich
31.125.0.0/16 65.5K
25.5%
British Telecommunications PLC GB England Holmfirth
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 Rushden
80.229.0.0/16 65.5K
43.2%
British Telecommunications PLC GB England Northampton
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 Enfield
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 Pinner
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 Manchester
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 Worcester
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 Bicester
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 England Reading
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 Hayes
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 Runcorn
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 Chingford
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 England Godstone
87.115.96.0/19 8.2K
100.0%
British Telecommunications PLC GB Wales Abergele
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 Tamworth
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 Dagenham
87.115.64.0/20 4.1K
100.0%
British Telecommunications PLC GB England Newquay
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 England Stevenage
195.99.224.0/20 4.1K
93.3%
British Telecommunications PLC GB England High Wycombe
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 Maidstone
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 England Royal Tunbridge Wells
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 Huntingdon
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 Wirral
217.45.24.0/21 2.0K
98.7%
British Telecommunications PLC GB England Gateshead
87.115.80.0/22 1.0K
100.0%
British Telecommunications PLC GB England Bromsgrove
91.125.108.0/22 1.0K
100.0%
British Telecommunications Limited GB England Hitchin
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 Devizes
217.32.148.0/22 1.0K
86.6%
British Telecommunications PLC GB England Stockport
217.32.160.0/22 1.0K
77.4%
British Telecommunications PLC GB Wales Wrexham
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 4,887 2026-07-22 00:05:55
146.90.0.0/16 4,840 2026-07-22 00:05:55
147.147.0.0/16 4,798 2026-07-22 00:05:55
194.75.80.0/20 4,793 2026-07-22 00:05:55
87.114.0.0/16 4,789 2026-07-22 00:05:55
195.99.32.0/19 4,784 2026-07-22 00:05:55
212.56.64.0/18 4,768 2026-07-22 00:05:55
194.75.220.0/22 4,753 2026-07-22 00:05:55
217.32.30.0/23 4,700 2026-07-22 00:05:55
143.159.0.0/16 4,697 2026-07-22 00:05:55
217.32.176.0/22 4,688 2026-07-22 00:05:55
195.99.224.0/20 4,679 2026-07-22 00:05:55
213.162.96.0/19 4,679 2026-07-22 00:05:55
213.31.0.0/16 4,678 2026-07-22 00:05:55
212.140.48.0/21 4,676 2026-07-22 00:05:55
212.140.32.0/20 4,672 2026-07-22 00:05:55
37.152.192.0/18 4,648 2026-07-22 00:05:55
212.140.0.0/19 4,645 2026-07-22 00:05:55
217.45.24.0/21 4,635 2026-07-22 00:05:55
84.92.0.0/15 4,625 2026-07-22 00:05:55
87.112.0.0/16 4,625 2026-07-22 00:05:55
217.39.16.0/20 4,616 2026-07-22 00:05:55
195.166.128.0/19 4,608 2026-07-22 00:05:55
212.159.8.0/23 4,590 2026-07-22 00:05:55
217.32.32.0/20 4,571 2026-07-22 00:05:55
217.45.96.0/20 4,569 2026-07-22 00:05:55
51.9.0.0/16 4,558 2026-07-22 00:05:55
146.66.32.0/19 4,532 2026-07-22 00:05:55
146.198.0.0/16 4,532 2026-07-22 00:05:55
146.200.0.0/16 4,526 2026-07-22 00:05:55
31.185.32.0/19 4,501 2026-07-22 00:05:55
217.46.128.0/20 4,497 2026-07-22 00:05:55
80.189.0.0/16 4,495 2026-07-22 00:05:55
217.32.160.0/22 4,492 2026-07-22 00:05:55
212.159.32.0/19 4,487 2026-07-22 00:05:55
83.216.128.0/19 4,486 2026-07-22 00:05:55
81.174.128.0/17 4,482 2026-07-22 00:05:55
80.229.0.0/16 4,478 2026-07-22 00:05:55
87.115.0.0/16 4,478 2026-07-22 00:05:55
194.75.0.0/19 4,477 2026-07-22 00:05:55
31.185.128.0/17 4,477 2026-07-22 00:05:55
195.99.88.0/21 4,472 2026-07-22 00:05:55
150.143.0.0/16 4,470 2026-07-22 00:05:55
84.51.128.0/18 4,466 2026-07-22 00:05:55
212.159.64.0/18 4,466 2026-07-22 00:05:55
91.125.0.0/16 4,466 2026-07-22 00:05:55
217.32.112.0/22 4,461 2026-07-22 00:05:55
195.213.0.0/16 4,461 2026-07-22 00:05:55
217.32.148.0/22 4,459 2026-07-22 00:05:55
46.208.0.0/16 4,458 2026-07-22 00:05:55

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: 2026-07-22 00:25:31 UTC
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