Autonomous System

AS51088 A2B IP B.V.

ISPActiveNetherlandsRIPE

AS51088 (A2B) is an ISP network operated by A2B IP B.V. in Netherlands, registered with RIPE. It has 57 IPv4 prefixes with 34,304 addresses and 19 IPv6 prefixes, which makes it the 5,134th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses34,304in 57 prefixes
IPv6 prefixes19≈ 6.3 × 10³⁰ addresses
Size rank#5,134of 82,200 active ASNs
Abuser scoreLow0.06% of its addresses flagged · method

Details

OrganizationA2B IP B.V. · hosting provider profile
AS nameA2B
Websitea2b-internet.com
Country Netherlands (NL)
Network typeISP
RegistryRIPE
Abuse contactabuse@a2b-internet.com
Registered2010-05-28
Last updated2026-01-20

IPv4 prefixes

57 prefixes · 34,304 addresses
NetworkAddressesFirst – last address
31.134.200.0/212,04831.134.200.0 – 31.134.207.255
46.244.0.0/212,04846.244.0.0 – 46.244.7.255
93.93.120.0/212,04893.93.120.0 – 93.93.127.255
178.249.152.0/212,048178.249.152.0 – 178.249.159.255
46.244.8.0/221,02446.244.8.0 – 46.244.11.255
46.244.24.0/221,02446.244.24.0 – 46.244.27.255
46.244.100.0/221,02446.244.100.0 – 46.244.103.255
46.244.104.0/221,02446.244.104.0 – 46.244.107.255
185.30.204.0/221,024185.30.204.0 – 185.30.207.255
185.34.220.0/221,024185.34.220.0 – 185.34.223.255
185.41.124.0/221,024185.41.124.0 – 185.41.127.255
185.44.244.0/221,024185.44.244.0 – 185.44.247.255
185.63.244.0/221,024185.63.244.0 – 185.63.247.255
185.205.52.0/221,024185.205.52.0 – 185.205.55.255
185.225.220.0/221,024185.225.220.0 – 185.225.223.255
185.240.112.0/221,024185.240.112.0 – 185.240.115.255
192.166.96.0/221,024192.166.96.0 – 192.166.99.255
46.244.12.0/2351246.244.12.0 – 46.244.13.255
46.244.14.0/2351246.244.14.0 – 46.244.15.255
46.244.16.0/2351246.244.16.0 – 46.244.17.255
46.244.112.0/2351246.244.112.0 – 46.244.113.255
46.244.120.0/2351246.244.120.0 – 46.244.121.255
46.244.122.0/2351246.244.122.0 – 46.244.123.255
46.244.124.0/2351246.244.124.0 – 46.244.125.255
185.37.4.0/23512185.37.4.0 – 185.37.5.255
The 25 largest of 57. The API and the database have all of them.

IPv6 prefixes

19 prefixes
  • 2a05:2900::/29
  • 2a0a:e80::/29
  • 2a0b:1c0::/29
  • 2a0f:ba00::/29
  • 2a0f:d440::/29
  • 2a12:4180::/29
  • 2a13:800::/29
  • 2a13:2c00::/29
  • 2a13:3400::/29
  • 2a01:77e0::/32
  • 2a02:1668::/32
  • 2a02:166a::/32
  • 2a02:166b::/32
  • 2a02:2738::/32
  • 2a04:6dc0::/32
  • 2a06:2602::/32
  • 2a14:12c0::/32
  • 2001:67c:eb0::/48
  • 2001:67c:1064::/48

Query AS51088 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=AS51088&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS51088, with or without a key:

curl "https://api.ipapi.is/?q=31.134.200.1"

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