AS51088 — A2B A2B IP B.V.

AS51088 announces 45 IPv4 prefixes covering 34,304 addresses and 18 IPv6 prefixes.

About this network

A2B is operated by A2B IP B.V., a Dutch internet service provider and wholesale carrier.

What it's used for

• The address space carries subscriber and customer traffic, evidenced by reverse DNS entries like 255-7-244-46.a2b-internet.com and netnames such as NL-A2BIP3-20101228.
• With 34,048 IPv4 addresses announced across 44 prefixes and 245 observed neighbours, the high neighbour-to-address ratio indicates a transit or wholesale role rather than a pure access network.
• As a regional NSP, the traffic consists of upstream transit for smaller ISPs and business customers, alongside direct subscriber connections in the Netherlands.

Notable

• Registrants for the majority of prefixes align with the announcer, listing A2B Internet Role-Object and A2B IP B.V..
• Some prefixes are registered to third parties, including Gemeente Alkmaar for 93.93.120.0/21 and Shioda Holding BV for 185.34.220.0/22, suggesting leased space or historical acquisitions.
• The inventory includes a mix of /21, /22, and smaller blocks, with a significant portion in the 46.244.0.0/16 range.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.10.192.0/24
• 31.41.255.0/24
• 31.134.200.0/21
• 45.85.191.0/24
• 46.175.131.0/24
• 46.244.0.0/20
• 46.244.16.0/23
• 46.244.20.0/22
• 46.244.24.0/21
• 46.244.100.0/22
• 46.244.104.0/22
• 46.244.112.0/23
• 46.244.120.0/21
• 62.3.55.0/24
• 62.68.84.0/24
• 91.213.13.0/24
• 93.93.120.0/21
• 93.190.124.0/24
• 146.19.97.0/24
• 146.19.192.0/24
• 178.211.151.0/24
• 178.249.152.0/21
• 185.30.204.0/23
• 185.30.207.0/24
• 185.34.220.0/22
• 185.37.4.0/23
• 185.37.6.0/24
• 185.40.254.0/24
• 185.41.124.0/22
• 185.44.244.0/22
• 185.46.173.0/24
• 185.51.52.0/23
• 185.63.244.0/22
• 185.205.52.0/22
• 185.217.118.0/24
• 185.218.207.0/24
• 185.225.220.0/22
• 185.240.112.0/22
• 188.95.143.0/24
• 192.166.96.0/22
• 193.39.250.0/24
• 193.108.238.0/24
• 193.110.189.0/24
• 193.169.108.0/23
• 212.24.126.0/24
• 2001:67c:eb0::/48
• 2001:67c:1064::/48
• 2a01:77e0::/32
• 2a02:1668::/32
• 2a02:166a::/31
• 2a02:2738::/32
• 2a04:6dc0::/32
• 2a05:2900::/29
• 2a06:2602::/32
• 2a0a:e80::/29
• 2a0b:1c0::/29
• 2a0f:ba00::/29
• 2a0f:d440::/29
• 2a12:4180::/29
• 2a13:800::/29
• 2a13:2c00::/29
• 2a13:3400::/29
• 2a14:12c0::/32

Upstream networks

• AS8455 atom86 BV
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS3303 Swisscom (Schweiz) AG
• AS50673 Serverius Holding B.V.
• AS1103 SURF B.V.
• AS42708 Glesys Sweden AB
• AS401753 BIXCE Inc
• AS24482 SG.GS
• AS25091 IP-Max SA
• AS13030 Init7 (Switzerland) Ltd.

Downstream networks

• AS202656 Ivanov Vitaliy Sergeevich
• AS973 Revive IT Solutions LLC
• AS52102 Tribion B.V.
• AS60131 High5! B.V.
• AS15562 Job Snijders
• AS203919 LUMADOCK LTD
• AS210449 SkyRENT B.V.
• AS35027 SEVENP B.V.
• AS12902 Ekco B.V.
• AS24642 Caveo Internet BV
• AS50119 Smith Computer Centrum Computers BV
• AS60479 Exclusief.net BV
• AS199292 Eljakim Information Technology B.V.
• AS60358 McCloud.nl B.V.
• AS50559 Stichting Dutch Institute for Vulnerability Disclosure
• AS213773 Bluem B.V.
• AS31019 Paulus M. Hoogsteder
• AS39855 Mod Mission Critical LLC
• AS205668 Green Mini host BV
• AS207179 WilroffReitsma B.V.
• AS20953 Info.nl Holding B.V.
• AS57129 GidPro BV
• AS199670 DNS-Belgium VZW
• AS8298 IPng Networks GmbH
• AS201995 EINDHOVEN FIBER EXCHANGE B.V.

Adjacent networks

• AS202656 Ivanov Vitaliy Sergeevich
• AS8455 atom86 BV
• AS3257 GTT Communications Inc.
• AS973 Revive IT Solutions LLC
• AS6461 Zayo Bandwidth
• AS3303 Swisscom (Schweiz) AG
• AS42708 Glesys Sweden AB
• AS1103 SURF B.V.
• AS6939 Hurricane Electric LLC
• AS52102 Tribion B.V.
• AS60131 High5! B.V.
• AS15562 Job Snijders
• AS203919 LUMADOCK LTD
• AS50673 Serverius Holding B.V.
• AS210449 SkyRENT B.V.
• AS35027 SEVENP B.V.
• AS12902 Ekco B.V.
• AS24642 Caveo Internet BV
• AS50119 Smith Computer Centrum Computers BV
• AS60479 Exclusief.net BV
• AS199292 Eljakim Information Technology B.V.
• AS60358 McCloud.nl B.V.
• AS50559 Stichting Dutch Institute for Vulnerability Disclosure
• AS213773 Bluem B.V.
• AS31019 Paulus M. Hoogsteder

Routing security

• RPKI: 69 valid, 0 invalid and 8 not-found announcements; 78 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 96 route objects.
• Listed in as-sets: AS-ATOM86CUST4, AS-ATOM86CUST6, AS-CAMBRIUM, AS-JAGUAR-PEERING-V6-NL-IX, AS-MANDA-AMSIX-PEERS-V4, AS-MANDA-AMSIX-PEERS-V6, AS-NFORCE-NL-IX-PEERS, AS-RIS-RRC03, AS-SERVIHOSTING, AS-SPEAKUP-AMSIX-RS, AS1200:AS-AMS-IX-PEERS, AS25151:AS-AMS-IX-PEERS, AS29075:AS-PEERS:AS-AMS-IX, AS29169:AS-PEERS4, AS29169:AS-PEERS6, AS3303:AS-SWCMPEERS, AS34968:AS-AMS-IX-PEERS, AS34968:AS-NL-IX-PEERS, AS39647:AS-PEERS-AMS-IX, AS49685:AS-PEERS-AMSIX, AS49820:AS-AMS-IX-PEERS, AS50295:AS-PEERS-AMSIX, AS51088:AS-A2B, AS5413:AS-ROUTE-SERVER-AMS-IX, AS5413:AS-ROUTE-SERVER-AMS-IX-PEERS.

Internet exchanges

• AMS-IX Amsterdam — Amsterdam, Netherlands
• The Frys Internet Exchange — Frysian, Netherlands
• Speed Internet Exchange — Dronten, Netherlands
• InterIX Internet Exchange — Amsterdam, Netherlands
• Asteroid Amsterdam IX — Amsterdam, Netherlands