Autonomous system
AS51088 A2B
Unclassified RIPE
Summary
A2B Internet
transit isp netherlands wholesale
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.comand netnames such asNL-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-ObjectandA2B IP B.V.. - Some prefixes are registered to third parties, including
Gemeente Alkmaarfor93.93.120.0/21andShioda Holding BVfor185.34.220.0/22, suggesting leased space or historical acquisitions. - The inventory includes a mix of /21, /22, and smaller blocks, with a significant portion in the
46.244.0.0/16range.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 6 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.208.209 |
| The Frys Internet Exchange | Frysian, Netherlands | 2001:7f8:10f::c790:179 |
| Speed Internet Exchange | Dronten, Netherlands | 185.1.222.177 |
| NetIX | Sofia, Bulgaria | 2001:67c:29f0::5:7463:225 |
| InterIX Internet Exchange | Amsterdam, Netherlands | 2001:7f8:134::89 |
| Asteroid Amsterdam IX | Amsterdam, Netherlands | 185.1.94.17 |
Transit providers
13 upstream, 26 downstream and 61 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 44 prefixes · 34.05K addresses IPv6 18 prefixes
| Country | Name | Prefixes |
|---|---|---|
| NL | Netherlands | 62 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51088- Registry name
- A2B
- Registrant
- A2B-INTERNET-MNT
- Abuse contact
- abuse@a2b-internet.com
- Registered
- 2010-05-28
- Last changed
- 2026-01-20
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 87% valid · 66 valid, 10 with no ROA
- ROAs
- 75 authorising AS51088
- ASPA
- no ASPA record
- IRR
- 100% registered · 76 of 76 announcements
- Route objects
- 95 naming AS51088
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere