Autonomous System

AS42772 Unitary enterprise A1

ISPActiveBelarusRIPE

AS42772 (A1-BY-AS) is an ISP network operated by Unitary enterprise A1 in Belarus, registered with RIPE. It has 385 IPv4 prefixes with 370,688 addresses and 19 IPv6 prefixes, which makes it the 820th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses370,688in 385 prefixes
IPv6 prefixes19≈ 4.9 × 10²⁹ addresses
Size rank#820of 82,200 active ASNs
Abuser scoreLow0.09% of its addresses flagged · method

Details

OrganizationUnitary enterprise A1
AS nameA1-BY-AS
Websitea1.by
Country Belarus (BY)
Network typeISP
RegistryRIPE
Abuse contactabuse@a1.by
Registered2007-04-13
Last updated2026-06-23

IPv4 prefixes

385 prefixes · 370,688 addresses
NetworkAddressesFirst – last address
37.17.0.0/1732,76837.17.0.0 – 37.17.127.255
178.163.128.0/1732,768178.163.128.0 – 178.163.255.255
128.65.0.0/1816,384128.65.0.0 – 128.65.63.255
151.249.128.0/1816,384151.249.128.0 – 151.249.191.255
37.17.64.0/198,19237.17.64.0 – 37.17.95.255
37.17.48.0/204,09637.17.48.0 – 37.17.63.255
37.17.96.0/204,09637.17.96.0 – 37.17.111.255
46.56.144.0/204,09646.56.144.0 – 46.56.159.255
46.56.176.0/204,09646.56.176.0 – 46.56.191.255
128.140.240.0/204,096128.140.240.0 – 128.140.255.255
195.222.64.0/204,096195.222.64.0 – 195.222.79.255
37.17.8.0/212,04837.17.8.0 – 37.17.15.255
37.17.24.0/212,04837.17.24.0 – 37.17.31.255
37.17.32.0/212,04837.17.32.0 – 37.17.39.255
37.17.40.0/212,04837.17.40.0 – 37.17.47.255
37.17.120.0/212,04837.17.120.0 – 37.17.127.255
46.53.128.0/212,04846.53.128.0 – 46.53.135.255
46.53.136.0/212,04846.53.136.0 – 46.53.143.255
46.53.144.0/212,04846.53.144.0 – 46.53.151.255
46.53.152.0/212,04846.53.152.0 – 46.53.159.255
46.53.160.0/212,04846.53.160.0 – 46.53.167.255
46.53.168.0/212,04846.53.168.0 – 46.53.175.255
46.53.184.0/212,04846.53.184.0 – 46.53.191.255
46.53.232.0/212,04846.53.232.0 – 46.53.239.255
46.53.240.0/212,04846.53.240.0 – 46.53.247.255
The 25 largest of 385. The API and the database have all of them.

IPv6 prefixes

19 prefixes
  • 2a00:1760::/32
  • 2a00:1761::/32
  • 2a00:1762::/32
  • 2a00:1763::/32
  • 2a00:1765::/32
  • 2a03:3000::/32
  • 2a00:1761:a000::/35
  • 2a00:1760:8000::/40
  • 2a00:1760:8100::/40
  • 2a00:1761:a000::/40
  • 2a00:1761:a100::/40
  • 2a00:1761:a200::/40
  • 2a00:1761:a300::/40
  • 2a00:1762:8000::/40
  • 2a00:1762:8100::/40
  • 2a00:1763:8000::/40
  • 2a00:1763:8100::/40
  • 2a00:1765:8000::/40
  • 2a00:1765:8100::/40

Query AS42772 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=AS42772&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS42772, with or without a key:

curl "https://api.ipapi.is/?q=37.17.0.1"

Other networks of Unitary enterprise A1

AS205820 Unitary enterprise A112,032 IPv4 addresses

Largest networks in Belarus

AS6697 Republican Unitary Telecommunication Enterprise Beltelecom1,689,088 IPv4 addressesAS25106 Mobile TeleSystems JLLC335,360 IPv4 addressesAS44087 BeST CJSC60,928 IPv4 addressesAS12406 Business Network Ltd21,248 IPv4 addressesAS205820 Unitary enterprise A112,032 IPv4 addressesAS60330 Belarusian Cloud Technologies LLC10,752 IPv4 addresses