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Autonomous System

AS51088

A2b Ip B.v.

Announced IPs
34,048
CIDR prefixes
44
ASN
AS51088

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

53/100
Caution
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 2 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS51088 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

PrefixOrigin ASNsLast detected (UTC)
185.44.244.0/22 AS12902, AS51088 2026-09-09 03:40:29
185.240.112.0/22 AS12902, AS51088 2026-09-09 02:55:28

Network profile

Source: PeeringDB →
Network type NSP
Traffic level 20-50Gbps
Geographic scope Regional
Traffic ratio Mostly Inbound
Peering policy Selective
IRR record RIPE::AS51088:AS-A2B

Present at 4 internet exchanges: AMS-IX, Speed-IX: SPEED-IX, Frys-IX, INTERIX

Web3 footprint

AS51088 hosts 2 observed decentralized-network nodes across 1 network. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
46.244.0.0/20 4.1K
89.6%
A2b Ip B.v. NL Limburg Maastricht
31.134.200.0/21 2.0K
8.1%
A2b Ip B.v. NL North Holland Amsterdam
46.244.24.0/21 2.0K
11.4%
A2b Ip B.v. NL North Holland Amstelveen
46.244.120.0/21 2.0K
48.3%
A2b Ip B.v. NL South Holland The Hague
93.93.120.0/21 2.0K
0.0%
A2b Ip B.v. NL
178.249.152.0/21 2.0K
91.9%
A2b Ip B.v. NL North Holland Amsterdam
46.244.20.0/22 1.0K
89.8%
A2b Ip B.v. NL North Holland Amstelveen
46.244.100.0/22 1.0K
0.4%
A2b Ip B.v. NL
46.244.104.0/22 1.0K
2.3%
A2b Ip B.v. NL North Brabant Eindhoven
185.34.220.0/22 1.0K
6.3%
A2b Ip B.v. NL
185.41.124.0/22 1.0K
1.7%
A2b Ip B.v. NL
185.44.244.0/22 1.0K
1.1%
A2b Ip B.v. NL
185.63.244.0/22 1.0K
0.5%
A2b Ip B.v. NL North Holland Amsterdam
185.205.52.0/22 1.0K
3.2%
A2b Ip B.v. NL North Holland Amsterdam
185.225.220.0/22 1.0K
0.0%
A2b Ip B.v. NL North Brabant Helmond
185.240.112.0/22 1.0K
0.0%
A2b Ip B.v. NL
192.166.96.0/22 1.0K
11.3%
A2b Ip B.v. NL
46.244.16.0/23 512
93.6%
A2b Ip B.v. NL North Holland Amstelveen
46.244.112.0/23 512
0.0%
A2b Ip B.v. NL South Holland The Hague
185.30.204.0/23 512
100.0%
A2b Ip B.v. NL
185.37.4.0/23 512
100.0%
A2b Ip B.v. NL
185.51.52.0/23 512
1.0%
A2b Ip B.v. NL
193.169.108.0/23 512
0.0%
A2b Ip B.v. NL
5.10.192.0/24 256
1.6%
A2b Ip B.v. NL North Holland Amsterdam
31.41.255.0/24 256
0.0%
A2b Ip B.v. NL
45.85.191.0/24 256
3.5%
A2b Ip B.v. NL North Holland Amsterdam
46.175.131.0/24 256
10.2%
A2b Ip B.v. NL North Holland Amsterdam
62.3.55.0/24 256
0.0%
A2b Ip B.v. NL
62.68.84.0/24 256
3.9%
A2b Ip B.v. NL
91.213.13.0/24 256
28.9%
A2b Ip B.v. NL
93.190.124.0/24 256
24.2%
A2b Ip B.v. NL
146.19.97.0/24 256
0.0%
A2b Ip B.v. NL South Holland Gorinchem
178.211.151.0/24 256
1.6%
A2b Ip B.v. NL
185.30.207.0/24 256
0.0%
A2b Ip B.v. NL
185.37.6.0/24 256
100.0%
A2b Ip B.v. NL
185.40.254.0/24 256
99.6%
A2b Ip B.v. NL
185.46.173.0/24 256
2.3%
A2b Ip B.v. NL North Holland Amsterdam
185.217.118.0/24 256
2.3%
A2b Ip B.v. NL
185.218.207.0/24 256
23.8%
A2b Ip B.v. NL
188.95.143.0/24 256
99.2%
A2b Ip B.v. NL
193.39.250.0/24 256
98.8%
A2b Ip B.v. NL
193.108.238.0/24 256
0.4%
A2b Ip B.v. NL
193.110.189.0/24 256
3.1%
A2b Ip B.v. NL
212.24.126.0/24 256
0.0%
A2b Ip B.v. NL

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS51088 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
188.95.143.0/24 10,509 2026-09-10 01:09:23
46.244.104.0/22 8,551 2026-09-10 01:08:48
5.10.192.0/24 8,518 2026-09-10 01:08:48
31.41.255.0/24 8,497 2026-09-10 01:08:48
185.40.254.0/24 8,434 2026-09-10 01:09:09
46.244.8.0/22 8,385 2026-09-10 01:23:43
62.68.84.0/24 8,328 2026-09-10 01:08:48
185.51.52.0/23 8,307 2026-09-10 01:09:23
193.39.250.0/24 8,305 2026-09-10 01:09:23
46.244.29.0/24 8,299 2026-09-10 01:08:48
31.134.200.0/21 8,296 2026-09-10 01:08:48
45.85.191.0/24 8,295 2026-09-10 01:08:48
46.244.126.0/24 8,293 2026-09-10 01:08:48
46.244.30.0/24 8,293 2026-09-10 01:08:48
46.244.100.0/22 8,290 2026-09-10 01:08:48
46.244.0.0/21 8,289 2026-09-10 01:23:43
46.244.28.0/24 8,288 2026-09-10 01:08:48
46.244.22.0/24 8,283 2026-09-10 01:08:48
46.244.31.0/24 8,282 2026-09-10 01:08:48
46.244.23.0/24 8,278 2026-09-10 01:08:48
46.175.131.0/24 8,270 2026-09-10 01:08:48
46.244.122.0/23 8,269 2026-09-10 01:08:48
185.63.244.0/22 8,269 2026-09-10 01:09:23
46.244.20.0/24 8,264 2026-09-10 01:08:48
46.244.127.0/24 8,261 2026-09-10 01:08:48
46.244.120.0/23 8,254 2026-09-10 01:08:48
46.244.21.0/24 8,247 2026-09-10 01:08:48
46.244.24.0/22 8,243 2026-09-10 01:08:48
46.244.14.0/23 8,238 2026-09-10 01:23:43
46.244.12.0/23 8,237 2026-09-10 01:23:43
62.3.55.0/24 8,232 2026-09-10 01:08:48
46.244.124.0/23 8,227 2026-09-10 01:08:48
46.244.112.0/23 8,223 2026-09-10 01:08:48
185.218.207.0/24 8,221 2026-09-10 01:09:25
46.244.16.0/23 8,216 2026-09-10 01:23:43
91.213.13.0/24 8,198 2026-09-10 01:08:48
193.108.238.0/24 8,183 2026-09-10 01:09:23
185.37.4.0/23 8,158 2026-09-10 01:09:23
185.37.6.0/24 8,134 2026-09-10 01:09:23
193.110.189.0/24 8,129 2026-09-10 01:09:23
185.217.118.0/24 8,108 2026-09-10 01:09:23
192.166.96.0/22 8,104 2026-09-10 01:09:23
93.190.124.0/24 8,097 2026-09-10 01:08:48
185.41.124.0/22 8,080 2026-09-10 01:09:23
93.93.120.0/21 8,072 2026-09-10 01:09:09
212.24.126.0/24 8,069 2026-09-10 01:09:23
178.249.152.0/21 8,051 2026-09-10 01:09:23
146.19.97.0/24 8,049 2026-09-10 01:08:48
185.205.52.0/22 8,048 2026-09-10 01:09:23
185.46.173.0/24 8,043 2026-09-10 01:09:23

Showing top 50 of 75 announced prefixes by sample volume.

Frequently Asked Questions

What is AS51088?

AS51088 is an Autonomous System Number assigned to A2b Ip B.v.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS51088 announce?

AS51088 announces 34.0K IPv4 addresses distributed across 44 routed CIDR prefixes. The network is registered in The Netherlands.

Who operates AS51088?

AS51088 is operated by A2b Ip B.v.. The organization is based in The Netherlands. You can view all IP ranges and related ASNs on the organization page.

What country is AS51088 registered in?

AS51088 is registered in The Netherlands. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-10 01:24:06 UTC
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