Autonomous System

AS2856

ActiveUnited Kingdom

AS2856 (BT-UK-AS) is a network in United Kingdom. It has 539 IPv4 prefixes with 18,491,648 addresses and 6 IPv6 prefixes, which makes it the 33rd largest of 82,612 active autonomous systems by IPv4 space.

IPv4 addresses18,491,648in 539 prefixes
IPv6 prefixes6≈ 1.1 × 10³¹ addresses
Size rank#33of 82,612 active ASNs
Abuser scoreVery Low0.02% of its addresses flagged · method

Details

Organization—
AS nameBT-UK-AS
Website—
Country United Kingdom (GB)
Network type—
Registry—
Abuse contact—
Registered—
Last updated—

IPv4 prefixes

539 prefixes · 18,491,648 addresses
NetworkAddressesFirst – last address
86.128.0.0/104,194,30486.128.0.0 – 86.191.255.255
81.128.0.0/112,097,15281.128.0.0 – 81.159.255.255
86.128.0.0/112,097,15286.128.0.0 – 86.159.255.255
81.128.0.0/121,048,57681.128.0.0 – 81.143.255.255
86.128.0.0/121,048,57686.128.0.0 – 86.143.255.255
109.144.0.0/121,048,576109.144.0.0 – 109.159.255.255
217.32.0.0/121,048,576217.32.0.0 – 217.47.255.255
31.48.0.0/13524,28831.48.0.0 – 31.55.255.255
95.144.0.0/13524,28895.144.0.0 – 95.151.255.255
31.100.0.0/14262,14431.100.0.0 – 31.103.255.255
31.112.0.0/14262,14431.112.0.0 – 31.115.255.255
31.116.0.0/14262,14431.116.0.0 – 31.119.255.255
147.148.0.0/14262,144147.148.0.0 – 147.151.255.255
194.72.0.0/14262,144194.72.0.0 – 194.75.255.255
213.120.0.0/14262,144213.120.0.0 – 213.123.255.255
5.80.0.0/15131,0725.80.0.0 – 5.81.255.255
31.90.0.0/15131,07231.90.0.0 – 31.91.255.255
31.92.0.0/15131,07231.92.0.0 – 31.93.255.255
31.106.0.0/15131,07231.106.0.0 – 31.107.255.255
31.122.0.0/15131,07231.122.0.0 – 31.123.255.255
31.126.0.0/15131,07231.126.0.0 – 31.127.255.255
46.68.0.0/15131,07246.68.0.0 – 46.69.255.255
109.180.0.0/15131,072109.180.0.0 – 109.181.255.255
5.81.0.0/1665,5365.81.0.0 – 5.81.255.255
31.94.0.0/1665,53631.94.0.0 – 31.94.255.255
The 25 largest of 539. The API and the database have all of them.

IPv6 prefixes

6 prefixes
  • 2a00:2380::/25
  • 2a01:4c8::/29
  • 2001:4878:c259::/48
  • 2a01:4c8:f400::/48
  • 2a01:4c8:f401::/48
  • 2a03:1e82:90ff::/48

Query AS2856 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS2856&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS2856, with or without a key:

curl "https://api.ipapi.is/?q=86.128.0.1"

Largest networks in United Kingdom

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