Country
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ASN LANDING PAGE
AS2856
BT-UK-AS British Telecommunications Limited
Last updated · Jul 20, 2026
Total prefixes
502
IPv4 prefixes
495
IPv6 prefixes
7
ASN summary
How to read the scale of AS2856
BT-UK-AS British Telecommunications Limited currently reports 502 prefixes and 80 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
BT-UK-AS British Telecommunications Limited is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS2856 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
AS2856 ASN lookupAS2856 BGPAS2856 peersAS2856 prefixesAS2856 upstreamsBT-UK-AS British Telecommunications Limited ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS33981
AS33981
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AS39550
AS39550
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AS25049
AS25049
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AS12222
AS12222
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AS14766
AS14766
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AS6871
AS6871
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AS19812
AS19812
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AS212329
AS212329
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AS54113
AS54113
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AS15248
AS15248
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AS394731
AS394731
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AS57002
AS57002
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AS201536
AS201536
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AS206051
AS206051
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AS204550
AS204550
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AS41570
AS41570
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AS9011
AS9011
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AS36224
AS36224
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AS206237
AS206237
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AS3573
AS3573
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AS39552
AS39552
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AS33127
AS33127
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AS15141
AS15141
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AS20705
AS20705
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AS19428
AS19428
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AS29033
AS29033
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AS209761
AS209761
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AS28863
AS28863
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AS2134
AS2134
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AS14931
AS14931
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AS205114
AS205114
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AS11939
AS11939
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AS60962
AS60962
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AS199675
AS199675
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AS15499
AS15499
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AS72
AS72
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AS13205
AS13205
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AS16525
AS16525
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AS17903
AS17903
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AS19305
AS19305
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Peers
AS5400
AS5400
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AS9002
AS9002
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AS13030
AS13030
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AS6461
AS6461
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AS14630
AS14630
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AS3303
AS3303
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AS5405
AS5405
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AS50304
AS50304
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AS60068
AS60068
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AS8220
AS8220
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AS4455
AS4455
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AS6424
AS6424
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AS199524
AS199524
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AS51185
AS51185
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AS48185
AS48185
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AS215638
AS215638
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AS48070
AS48070
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AS35266
AS35266
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AS6908
AS6908
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AS39122
AS39122
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AS1828
AS1828
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AS6204
AS6204
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AS61049
AS61049
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AS42473
AS42473
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AS3170
AS3170
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AS50300
AS50300
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AS137409
AS137409
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AS6667
AS6667
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AS17639
AS17639
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AS13237
AS13237
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AS36236
AS36236
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AS49544
AS49544
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AS9009
AS9009
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AS30844
AS30844
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AS8426
AS8426
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AS1267
AS1267
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AS9505
AS9505
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AS56595
AS56595
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AS25180
AS25180
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AS8966
AS8966
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 109.144.0.0/12 | AS2856 | — |
| 109.180.0.0/15 | AS2856 | — |
| 109.205.158.0/24 | AS2856 | — |
| 109.249.0.0/16 | AS2856 | — |
| 132.146.0.0/16 | AS2856 | — |
| 132.153.244.0/24 | AS2856 | — |
| 132.153.245.0/24 | AS2856 | — |
| 132.153.246.0/24 | AS2856 | — |
| 132.153.247.0/24 | AS2856 | — |
| 132.153.248.0/24 | AS2856 | — |
| 132.153.249.0/24 | AS2856 | — |
| 132.153.250.0/24 | AS2856 | — |
| 132.153.251.0/24 | AS2856 | — |
| 132.153.252.0/24 | AS2856 | — |
| 132.153.253.0/24 | AS2856 | — |
| 132.153.254.0/24 | AS2856 | — |
| 132.153.3.0/24 | AS2856 | — |
| 132.244.79.0/24 | AS2856 | — |
| 138.108.94.0/24 | AS2856 | — |
| 142.205.162.0/23 | AS2856 | — |
| 143.223.132.0/24 | AS2856 | — |
| 144.177.74.0/23 | AS2856 | — |
| 144.87.0.0/21 | AS2856 | — |
| 144.87.128.0/18 | AS2856 | — |
| 144.87.16.0/20 | AS2856 | — |
| 144.87.24.0/21 | AS2856 | — |
| 144.87.24.0/22 | AS2856 | — |
| 144.87.28.0/22 | AS2856 | — |
| 145.79.172.0/22 | AS2856 | — |
| 147.148.0.0/14 | AS2856 | — |
| 147.152.0.0/16 | AS2856 | — |
| 147.189.68.0/22 | AS2856 | — |
| 147.189.76.0/22 | AS2856 | — |
| 147.78.68.0/22 | AS2856 | — |
| 147.90.115.0/24 | AS2856 | — |
| 147.90.127.0/24 | AS2856 | — |
| 147.90.32.0/24 | AS2856 | — |
| 147.90.36.0/24 | AS2856 | — |
| 147.90.55.0/24 | AS2856 | — |
| 148.252.3.0/24 | AS2856 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS2856 represent?
AS2856 is an autonomous system number. The current source associates it with BT-UK-AS British Telecommunications Limited and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
What are peers, upstreams, and prefixes useful for on the AS2856 page?
They help explain the scale, interconnection depth, and route structure of AS2856. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS2856?
Open a concrete IP page to check how the address maps into AS2856, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
Related topics
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