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
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| Network | Addresses | First – last address |
|---|---|---|
| 31.134.200.0/21 | 2,048 | 31.134.200.0 – 31.134.207.255 |
| 46.244.0.0/21 | 2,048 | 46.244.0.0 – 46.244.7.255 |
| 93.93.120.0/21 | 2,048 | 93.93.120.0 – 93.93.127.255 |
| 178.249.152.0/21 | 2,048 | 178.249.152.0 – 178.249.159.255 |
| 46.244.8.0/22 | 1,024 | 46.244.8.0 – 46.244.11.255 |
| 46.244.24.0/22 | 1,024 | 46.244.24.0 – 46.244.27.255 |
| 46.244.100.0/22 | 1,024 | 46.244.100.0 – 46.244.103.255 |
| 46.244.104.0/22 | 1,024 | 46.244.104.0 – 46.244.107.255 |
| 185.30.204.0/22 | 1,024 | 185.30.204.0 – 185.30.207.255 |
| 185.34.220.0/22 | 1,024 | 185.34.220.0 – 185.34.223.255 |
| 185.41.124.0/22 | 1,024 | 185.41.124.0 – 185.41.127.255 |
| 185.44.244.0/22 | 1,024 | 185.44.244.0 – 185.44.247.255 |
| 185.63.244.0/22 | 1,024 | 185.63.244.0 – 185.63.247.255 |
| 185.205.52.0/22 | 1,024 | 185.205.52.0 – 185.205.55.255 |
| 185.225.220.0/22 | 1,024 | 185.225.220.0 – 185.225.223.255 |
| 185.240.112.0/22 | 1,024 | 185.240.112.0 – 185.240.115.255 |
| 192.166.96.0/22 | 1,024 | 192.166.96.0 – 192.166.99.255 |
| 46.244.12.0/23 | 512 | 46.244.12.0 – 46.244.13.255 |
| 46.244.14.0/23 | 512 | 46.244.14.0 – 46.244.15.255 |
| 46.244.16.0/23 | 512 | 46.244.16.0 – 46.244.17.255 |
| 46.244.112.0/23 | 512 | 46.244.112.0 – 46.244.113.255 |
| 46.244.120.0/23 | 512 | 46.244.120.0 – 46.244.121.255 |
| 46.244.122.0/23 | 512 | 46.244.122.0 – 46.244.123.255 |
| 46.244.124.0/23 | 512 | 46.244.124.0 – 46.244.125.255 |
| 185.37.4.0/23 | 512 | 185.37.4.0 – 185.37.5.255 |
31.134.200.0/21 46.244.0.0/21 93.93.120.0/21 178.249.152.0/21 46.244.8.0/22 46.244.24.0/22 46.244.100.0/22 46.244.104.0/22 185.30.204.0/22 185.34.220.0/22 185.41.124.0/22 185.44.244.0/22 185.63.244.0/22 185.205.52.0/22 185.225.220.0/22 185.240.112.0/22 192.166.96.0/22 46.244.12.0/23 46.244.14.0/23 46.244.16.0/23 46.244.112.0/23 46.244.120.0/23 46.244.122.0/23 46.244.124.0/23 185.37.4.0/23
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
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"
Largest networks in Netherlands
AS20940 Akamai International B.V.15,600,128 IPv4 addressesAS33915 Vodafone Libertel B.V.12,032,256 IPv4 addressesAS1136 KPN B.V.7,316,992 IPv4 addressesAS1103 SURF B.V.7,217,408 IPv4 addressesAS50266 Odido Netherlands B.V.2,200,320 IPv4 addressesAS6830 Liberty Global Europe Holding B.V.2,100,224 IPv4 addresses