$ query “AS51088” --type=asn → 1 result(s)

AS51088 · A2B

A2B IP B.V.

AS51088 is run by A2B IP B.V. and is a mid-size transit provider, based in the Netherlands since 2010. The system announces a respectable 34 560 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the Netherlands, with additional presence in Belgium. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇳🇱 Netherlands
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
May 28, 2010
Last Changed
March 04, 2026
Last Seen
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
58 / 44
IPv6 Prefixes (raw / aggregated)
19 / 18
IPv4 Addresses
34 560
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇳🇱 Netherlands (34 288 IPs), 🇧🇪 Belgium (272 IPs)
Prefix Changed
October 15, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
102 networks exchanging traffic without transit
Downstream Customers
28 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
139 unique BGP neighbors
Reach
34 networks in customer cone

Upstream Providers (4)

Prefix Lists

IPv4 Prefixes (58 total)

  • 46.244.0.0/20 (4 096 addresses (/20 prefix))
  • 31.134.200.0/21 (2 048 addresses (/21 prefix))
  • 46.244.24.0/21 (2 048 addresses (/21 prefix))
  • 46.244.120.0/21 (2 048 addresses (/21 prefix))
  • 93.93.120.0/21 (2 048 addresses (/21 prefix))
  • 178.249.152.0/21 (2 048 addresses (/21 prefix))
  • 46.244.20.0/22 (1 024 addresses (/22 prefix))
  • 46.244.100.0/22 (1 024 addresses (/22 prefix))
  • 46.244.104.0/22 (1 024 addresses (/22 prefix))
  • 185.30.204.0/22 (1 024 addresses (/22 prefix))
  • 185.34.220.0/22 (1 024 addresses (/22 prefix))
  • 185.41.124.0/22 (1 024 addresses (/22 prefix))
  • 185.44.244.0/22 (1 024 addresses (/22 prefix))
  • 185.63.244.0/22 (1 024 addresses (/22 prefix))
  • 185.205.52.0/22 (1 024 addresses (/22 prefix))
  • 185.225.220.0/22 (1 024 addresses (/22 prefix))
  • 185.240.112.0/22 (1 024 addresses (/22 prefix))
  • 192.166.96.0/22 (1 024 addresses (/22 prefix))
  • 46.244.16.0/23 (512 addresses (/23 prefix))
  • 46.244.112.0/23 (512 addresses (/23 prefix))
  • 185.37.4.0/23 (512 addresses (/23 prefix))
  • 185.51.52.0/23 (512 addresses (/23 prefix))
  • 193.169.108.0/23 (512 addresses (/23 prefix))
  • 5.10.192.0/24 (256 addresses (/24 prefix))
  • 31.41.255.0/24 (256 addresses (/24 prefix))
  • 45.85.191.0/24 (256 addresses (/24 prefix))
  • 46.175.131.0/24 (256 addresses (/24 prefix))
  • 62.3.55.0/24 (256 addresses (/24 prefix))
  • 62.68.84.0/24 (256 addresses (/24 prefix))
  • 91.213.13.0/24 (256 addresses (/24 prefix))
  • 93.190.124.0/24 (256 addresses (/24 prefix))
  • 146.19.97.0/24 (256 addresses (/24 prefix))
  • 146.19.192.0/24 (256 addresses (/24 prefix))
  • 178.211.151.0/24 (256 addresses (/24 prefix))
  • 185.37.6.0/24 (256 addresses (/24 prefix))
  • 185.40.254.0/24 (256 addresses (/24 prefix))
  • 185.46.173.0/24 (256 addresses (/24 prefix))
  • 185.217.118.0/24 (256 addresses (/24 prefix))
  • 185.218.207.0/24 (256 addresses (/24 prefix))
  • 188.95.143.0/24 (256 addresses (/24 prefix))
  • 193.39.250.0/24 (256 addresses (/24 prefix))
  • 193.108.238.0/24 (256 addresses (/24 prefix))
  • 193.110.189.0/24 (256 addresses (/24 prefix))
  • 212.24.126.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (19 total)

  • 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
  • 2a02:166a::/31
  • 2a01:77e0::/32
  • 2a02:1668::/32
  • 2a02:2738::/32
  • 2a04:6dc0::/32
  • 2a06:2602::/32
  • 2a14:12c0::/32
  • 2001:67c:eb0::/48
  • 2001:67c:1064::/48