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AS51088A2B IP B.V.

NetherlandsRegistryRIPE NCCTypeEyeball

As of 26th September 2026, AS51088 (A2B IP B.V.), an access network registered in the Netherlands with RIPE NCC, originates 70 IPv4 prefixes covering 54.3k addresses and 20 IPv6 prefixes. By IPv4 address space that makes it the 4,283rd-largest of the 79,480 networks we see originating IPv4, and the 58th-largest of 1,023 in the Netherlands. It is seen behind 14 upstream networks, most often AS8298 (IPng Networks GmbH) and AS8455 (atom86 BV), and in front of 40 downstream networks. 83% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 81% of its routes reach at least 90% of full-feed peers, and 4 prefixes are also originated by another network.

At a glance

IPv4 prefixes

70

IPv6 prefixes

20

IPv4 addresses

54.3k

IPv6 /64s

378B

Upstream graph

The networks AS51088 is seen behind, one and two hops out, drawn from real AS paths.

AS51088Toward the internet core
Upstream graph for AS51088: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51088A2B IP B.V.This networkAS3257GTT Communication…AS6667Elisa OyjAS8298IPng Networks GmbHAS8455atom86 BVAS13030Init7 (Switzerlan…AS398465Rackdog LLCAS3356Lumen (Level 3)AS8283Netwerkvereniging…AS25091IP-Max SAAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS56662Marcin Gondek

Networks observed one and two hops upstream of AS51088 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

310

adjacent networks

Upstreams
145%
Peers
25683%
Downstreams
4013%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS51088
NetworkCountryRelationshipPathsVantage pts
AS8298IPng Networks GmbHCHPeer27,1402
AS8455atom86 BVNLPeer12,14681
AS3257GTT Communications Inc.USPeer9,35387
AS13030Init7 (Switzerland) Ltd.CHPeer7885
AS6667Elisa OyjFIPeer7222
AS34288Kantonsschule ZugCHPeer6642
AS49544i3D.net B.VNLPeer3832
AS3303Swisscom (Schweiz) AGCHPeer3371
AS6939Hurricane Electric LLCUSPeer32512
AS25091IP-Max SACHPeer562

Prefixes

All 90

The largest blocks AS51088 originates, widest first.

Largest prefixes originated by AS51088
PrefixAddressesVisibility
46.244.0.0/198.2k1/81
46.244.96.0/198.2k1/81
31.134.200.0/212k81/81
46.244.0.0/212k81/81
93.93.120.0/212k81/81
178.249.152.0/212k81/81
46.244.8.0/221k81/81
46.244.24.0/221k81/81
46.244.100.0/221k81/81
46.244.104.0/221k81/81

Routing health

How AS51088's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid83.3%75
  • Invalid0.0%0
  • No ROA16.7%15

Propagation

  • Globally propagated90% of full-feed peers or more81.1%73
  • Partially propagated40% to 90%1.1%1
  • Seen by few peersUnder 40%17.8%16

Prefix sizes

IPv4 — 70 prefixes

IPv6 — 20 prefixes

  • /2934.4B × /6450.0%10
  • /324.3B × /6440.0%8
  • /4865.5k × /6410.0%2

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS51088 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.