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AS number details
AS2856
BT-UK-AS
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- Prefixes
- Peers
- Upstreams
- Downstreams
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Summary
AS Number
AS2856
AS Name
BT-UK-AS
Country
United Kingdom
Website
IPv4 Prefixes
256
IPv6 Prefixes
5
IPv4 Peers
182
IPv6 Peers
25
IPv4 Upstreams
2
IPv6 Upstreams
2
Regional Registry
RIPE
Allocated Date
22nd December 1993
Allocated Status
Allocated
Prefixes
IPv4 Prefixes
IPv6 Prefixes
There are 256 IPv4 Prefixes for this ASN.
| Announced Prefix | Description | Country | Parent Prefix | RIR |
|---|---|---|---|---|
| 109.205.158.0/24 | United Kingdom | 109.205.152.0/21 | RIPE | |
| 116.66.140.0/22 | Cognizant Technology Solution India Pvt Ltd, India | India | 116.66.128.0/19 | APNIC |
| 132.146.0.0/16 | British Telecom | United Kingdom | RIPE | |
| 132.153.244.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.245.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.246.0/24 | Atomic Weapons Establishment | United Kingdom | 132.153.0.0/16 | RIPE |
| 132.153.247.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.248.0/24 | Atomic Weapons Establishment | United Kingdom | 132.153.0.0/16 | RIPE |
| 132.153.249.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.250.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.251.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.252.0/24 | Atomic Weapons Establishment | United Kingdom | 132.153.0.0/16 | RIPE |
| 132.153.253.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.254.0/24 | United Kingdom | 132.153.0.0/16 | RIPE | |
| 132.153.3.0/24 | RIPE Network Coordination Centre | Netherlands | 132.153.0.0/16 | RIPE |
| 138.108.94.0/24 | A.C. Nielsen Company | United States | 138.108.0.0/16 | ARIN |
| 142.205.161.0/24 | Toronto Dominion Bank | Canada | 142.205.0.0/16 | ARIN |
| 142.205.162.0/23 | Toronto Dominion Bank | Canada | 142.205.0.0/16 | ARIN |
| 144.177.74.0/23 | Norway | 144.177.0.0/16 | RIPE | |
| 144.87.0.0/20 | Royal Mail Group Limited | United Kingdom | 144.87.0.0/16 | RIPE |
| 2a00:2380::/25 | United Kingdom | 2a00:2000::/22 | RIPE | |
| 2a01:4c8:f401::/48 | EE Limited | United Kingdom | 2a01:4c8::/29 | RIPE |
| 2a02:ee80:4176::/47 | Accenture B. V. | Netherlands | 2a02:ee80::/29 | RIPE |
| 2a03:1e82:90ff::/48 | BMW_UK | United Kingdom | 2a03:1e80::/29 | RIPE |
Peers
IPv4 Peers
IPv6 Peers
There are 182 IPv4 Peers for this ASN.
| ASN | Description | Country | IPv4 |
|---|---|---|---|
| AS11031 | Orbis Investments (Canada) Limited | Canada | false |
| AS11528 | Photronics Inc. | United States | false |
| AS11757 | Whirlpool Corporation | United States | false |
| AS11939 | The MathWorks, Inc. | United States | false |
| AS12222 | Akamai Technologies, Inc. | United States | true |
| AS12440 | HNS-DE | Germany | false |
| AS12576 | EE Ltd | United Kingdom | false |
| AS1294 | NTT DATA Services Holdings Corporation | United States | false |
| AS131993 | UNIT 107 MULTISTORIED BUILDING, SEEPZ, | India | false |
| AS13205 | BTWWIDC-H Autonomous System | United Kingdom | false |
| AS13458 | Davidson Kempner Capital Management LLC | United States | false |
| AS14630 | Invesco Group Services, Inc. | United States | false |
| AS14766 | Magnetar Capital LLC | United States | true |
| AS14931 | The St. Paul Travelers Companies, Inc. | United States | false |
| AS15141 | Bausch & Lomb | United States | false |
| AS15248 | Metaswitch Networks Corp. | United States | true |
| AS15499 | Computacenter Management GmbH trading as Computacenter AG & Co.oHG | Germany | false |
| AS15601 | Baring Investment Services Ltd | United Kingdom | false |
| AS15865 | Elliott Advisors UK (Ltd) | United Kingdom | false |
| AS16477 | Nielsen Consumer LLC | United States | false |
| ASN | Description | Country | IPv6 |
|---|---|---|---|
| AS14766 | Magnetar Capital LLC | United States | true |
| AS15248 | Metaswitch Networks Corp. | United States | true |
| AS199462 | NETISP UK Regional network | United Kingdom | true |
| AS201529 | Orchid Cellmark Ltd | United Kingdom | true |
| AS201536 | Data Centre Plus | United Kingdom | true |
| AS202907 | Atomic IT Limited | United Kingdom | true |
| AS204550 | Continental Limited | United Kingdom | true |
| AS204819 | WPM Software Ltd | United Kingdom | true |
| AS206335 | Hudson Global Resources Ltd | United Kingdom | true |
| AS20705 | HSBC Bank plc | United Kingdom | true |
| AS207072 | Nigsun Limited | United Kingdom | true |
| AS211389 | Briant Broadband Limited | United Kingdom | true |
| AS212329 | Netcraft Ltd | United Kingdom | true |
| AS21267 | Wavenet offer a range of products from | United Kingdom | true |
| AS21433 | London DC | United Kingdom | true |
| AS29033 | Eckoh UK Limited | United Kingdom | true |
| AS3573 | Accenture LLP | United States | false |
| AS394731 | Canadian Natural Resources Limited | Canada | true |
| AS5400 | British Telecommunications PLC | United Kingdom | true |
| AS63399 | Dialpad, Inc. | United States | true |
Upstreams
IPv4 Upstreams
IPv6 Upstreams
There are 2 IPv4 Upstreams for this ASN.
Downstreams
IPv4 Downstreams
IPv6 Downstreams
There are 171 IPv4 Downstreams for this ASN.
| Announced Prefix | Description | Country | IPv4 |
|---|---|---|---|
| AS11031 | Orbis Investments (Canada) Limited | Canada | false |
| AS11528 | Photronics Inc. | United States | false |
| AS11757 | Whirlpool Corporation | United States | false |
| AS11939 | The MathWorks, Inc. | United States | false |
| AS12222 | Akamai Technologies, Inc. | United States | true |
| AS12440 | HNS-DE | Germany | false |
| AS1294 | NTT DATA Services Holdings Corporation | United States | false |
| AS131993 | UNIT 107 MULTISTORIED BUILDING, SEEPZ, | India | false |
| AS13205 | BTWWIDC-H Autonomous System | United Kingdom | false |
| AS13458 | Davidson Kempner Capital Management LLC | United States | false |
| AS14766 | Magnetar Capital LLC | United States | true |
| AS14931 | The St. Paul Travelers Companies, Inc. | United States | false |
| AS15141 | Bausch & Lomb | United States | false |
| AS15248 | Metaswitch Networks Corp. | United States | true |
| AS15499 | Computacenter Management GmbH trading as Computacenter AG & Co.oHG | Germany | false |
| AS15601 | Baring Investment Services Ltd | United Kingdom | false |
| AS15865 | Elliott Advisors UK (Ltd) | United Kingdom | false |
| AS16477 | Nielsen Consumer LLC | United States | false |
| AS16525 | KBR | United States | false |
| AS16807 | Kyndryl | United States | false |
| Announced Prefix | Description | Country | IPv6 |
|---|---|---|---|
| AS14766 | Magnetar Capital LLC | United States | true |
| AS15248 | Metaswitch Networks Corp. | United States | true |
| AS199462 | NETISP UK Regional network | United Kingdom | true |
| AS201529 | Orchid Cellmark Ltd | United Kingdom | true |
| AS201536 | Data Centre Plus | United Kingdom | true |
| AS202907 | Atomic IT Limited | United Kingdom | true |
| AS204550 | Continental Limited | United Kingdom | true |
| AS204819 | WPM Software Ltd | United Kingdom | true |
| AS206335 | Hudson Global Resources Ltd | United Kingdom | true |
| AS20705 | HSBC Bank plc | United Kingdom | true |
| AS207072 | Nigsun Limited | United Kingdom | true |
| AS211389 | Briant Broadband Limited | United Kingdom | true |
| AS212329 | Netcraft Ltd | United Kingdom | true |
| AS21267 | Wavenet offer a range of products from | United Kingdom | true |
| AS21433 | London DC | United Kingdom | true |
| AS29033 | Eckoh UK Limited | United Kingdom | true |
| AS3573 | Accenture LLP | United States | false |
| AS394731 | Canadian Natural Resources Limited | Canada | true |
| AS63399 | Dialpad, Inc. | United States | true |
| AS6871 | UK Internet Service Provider | United Kingdom | true |
Graphs
World Map
WHOIS Details
Related Networks
What is an ASN?
An Autonomous System (AS) is a collection of connected networks that operate under a common administrative domain and share routing policies. Each AS is identified by a unique Autonomous System Number (ASN), which is used to exchange routing information with other ASs. AS can control how traffic flows through networks and then filter out unwanted traffic.
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