AS number details


A2B IP B.V.  ·

AS51088 – A2B IP B.V.

Country Netherlands
Hosted domains 15,557
Number of IPs 108,032
ASN type Hosting
Allocated 12 years ago on May 28, 2010

IP Address Ranges

Netblock Company Num of IPs A2B IP B.V. 256 A2B IP B.V. 256 A2B IP B.V. 2,048 Zeta IT Security B.V. 256 Aumatics B.V. 1,024 A2B IP B.V. 1,024 B.V. 1,024 Cloud2 B.V. 1,024 Justspark Managed IT B.V. 1,024 Nebula-Online B.V. 1,024 Advanced Team Systems Center B.V. 512 Whoopa hosting - nl.atsc 256 VOF 1,024 B.V. 1,024 DC1.AMSTERDAM Cooperatie U.A. 256 Access range 512 It's Us B.V. 1,024 Netaffairs Internetdiensten BV 256 Effect ICT Solutions B.V. 1,024 Easy Networking B.V. 256 Infra-Commerce Investments B.V. 256 Core Competence IT 512 IP-Connected B.V. 256 Monta Services BV 256 A2B IP B.V. 256 A2B IP B.V. 2,048 A2B IP B.V. 256 Infra-Commerce Investments B.V. 1,024 B.V. 256 A2B IP B.V. 8,192 A2B IP B.V. 8,192 A2B IP B.V. 256 B.V. 2,048 A2B IP B.V. 256 Cuttle bv 256 Easy Networking B.V. 256 Riksjaonline B.V. 512 Infra-Commerce Investments B.V. 256 Gemeente Alkmaar 2,048
Netblock Company
2001:67c:1064::/48 Easy Networking B.V.
2a01:77e0::/32 B.V.
2a02:1668::/32 A2B IP B.V.
2a02:166b::/32 DSL/FTTH
2a02:2738::/32 Gemeente Alkmaar
2a05:2900::/29 A2B IP B.V.
2a06:2602::/32 A2B IP B.V.
2a0a:e80::/29 A2B IP B.V.
2a0b:1c0::/29 A2B IP B.V.
2a0f:ba00::/29 A2B IP B.V.
2a0f:d440::/29 Infra-Commerce Investments B.V.
2a12:4180::/29 DC1.AMSTERDAM Cooperatie U.A.
2a13:2c00::/29 A2B IP B.V.
2a13:3400::/29 A2B IP B.V.
2a13:800::/29 A2B IP B.V.
Get all this data and more in JSON format using our ASN API Read More

WHOIS Details

as-block:       AS47104 - AS51355
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2022-05-18T08:45:25Z
last-modified:  2022-05-18T08:45:25Z
source:         RIPE

aut-num:        AS51088
as-name:        A2B
org:            ORG-AIB22-RIPE
remarks:        ============================================================
remarks:        AMS-IX peering
remarks:        ============================================================
import:         from AS51088:AS-PEERS-AMSIX action pref=80; accept ANY AND NOT {}
export:         to AS51088:AS-PEERS-AMSIX announce AS-A2B
remarks:        ============================================================
remarks:        AMS-IX route server policy
remarks:        ============================================================
import-via:     AS6777 from AS-AMS-IX-RS EXCEPT AS61180:AS-PEERS-AMSIX accept ANY
export-via:     AS6777 to AS-AMS-IX-RS EXCEPT AS61180:AS-PEERS-AMSIX announce AS-A2B
remarks:        ============================================================
remarks:        A2B Internet customers
remarks:        ============================================================
import:         from AS57060 action pref=50; accept AS57060
export:         to AS57060 announce ANY
import:         from AS60358 action pref=50; accept AS60358
export:         to AS60358 announce ANY
import:         from AS200560 action pref=50; accept AS200560
export:         to AS200560 announce ANY
import:         from AS202169 action pref=50; accept AS202169
export:         to AS202169 announce ANY
import:         from AS206521 action pref=50; accept AS206521
export:         to AS206521 announce ANY
import:         from AS206637 action pref=50; accept AS-IQIP
export:         to AS206637 announce ANY
remarks:        ============================================================
remarks:        Transits
remarks:        ============================================================
import:         from AS2914 action pref=100; accept ANY AND NOT {}
export:         to AS2914 announce AS-A2B
import:         from AS3257 action pref=100; accept ANY AND NOT {}
export:         to AS3257 announce AS-A2B
import:         from AS6453 action pref=100; accept ANY AND NOT {}
export:         to AS6453 announce AS-A2B
remarks:        ============================================================
remarks:        Basic Interconnection Requirements
remarks:        ============================================================
remarks:        The following is required to share a BGP session with
remarks:        AS51088:
remarks:        - The customer's gateway router must be using BGP v4.
remarks:        - The customer must use a RIR assigned ASN.
remarks:        - The customer must have its customer-routes registered with
remarks:        an instance of the IRR. Its 'as-set' must include the ASNs
remarks:        originating routes and for each route exported a relevant
remarks:        'route' object is required.
remarks:        - The customer must export its customer-routes reasonably
remarks:        aggregated, and AS51088 will not accept any prefix that is
remarks:        longer than a /24 (except for denial-of-service mitigation).
remarks:        - The customer may use MED to signal its return path pre-
remarks:        ference in AS51088.
admin-c:        AS51088-RIPE
tech-c:         AS51088-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         A2B-INTERNET-MNT
created:        2010-05-28T12:48:01Z
last-modified:  2020-11-17T17:48:41Z
source:         RIPE
abuse-c:        AS51088-RIPE
abuse-org:      ORG-AIB22-RIPE

organisation:   ORG-AIB22-RIPE
org-name:       A2B IP B.V.
country:        NL
org-type:       LIR
address:        Spinnekop 2
address:        1444GN
address:        Purmerend
address:        NETHERLANDS
phone:          +31859020410
admin-c:        AS51088-RIPE
tech-c:         AS51088-RIPE
abuse-c:        AS51088-RIPE
mnt-ref:        A2B-INTERNET-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         A2B-INTERNET-MNT
created:        2019-03-22T10:08:47Z
last-modified:  2021-10-19T08:37:17Z
source:         RIPE

role:           A2B Internet Role-Object
address:        Spinnekop 2
address:        NL-1444 GN Purmerend
address:        The Netherlands
phone:          +31 85 902 0410
remarks:        ------------------------------------------------
remarks:        abuse complaints ONLY to please
remarks:        provide as much details and include full headers
remarks:        and/or logfiles.
remarks:        Peering questions / requests to
remarks:        Network questions / issues to
remarks:        The helpdesk can be reached at
remarks:        ------------------------------------------------
admin-c:        bais-RIPE
tech-c:         bais-RIPE
tech-c:         JL13412-RIPE
nic-hdl:        AS51088-RIPE
mnt-by:         A2B-INTERNET-MNT
created:        2010-05-28T17:13:29Z
last-modified:  2021-11-09T13:19:28Z
source:         RIPE
Get all this data and more in JSON format using our ASN API Read More

Hosted Domains

There are 15,557 domain names hosted across 938 IP addresses on this ASN.

IP Address Domain Domains on this IP 635 630 356 338 301 247 245 222 219 218 217 199 194 189 189 188 187 181 181 179 174 170 163 162 153 147 146 143 141 140 140 138 134 131 128 127 125 123 121 115 109 108 107 104 102 101 100 99 99 99

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity


There are 115 peers for this ASN.

Peers Name
AS1103 SURF B.V.
AS1140 Stichting Internet Domeinregistratie Nederland
AS1239 Sprint
AS12552 GlobalConnect AB
AS12637 SEEWEB s.r.l.
AS12779 IT.Gate S.p.A.
AS12859 BIT BV
AS13030 Init7 (Switzerland) Ltd.
AS13194 UAB Bite Lietuva
AS13237 euNetworks GmbH
AS137409 GSL Networks Pty LTD
AS13786 Seabras 1 USA, LLC
AS14061 DigitalOcean, LLC
AS14537 Continent 8 LLC
AS14630 Invesco Group Services, Inc.
AS14840 BR Digital
AS14907 Wikimedia Foundation Inc.
AS15435 DELTA Fiber Nederland B.V.
AS15576 NTS workspace AG
AS15605 Connesi s.p.a.
AS1828 Unitas Global LLC
AS199938 Netzwerge GmbH
AS202365 Omer GOLGELI
AS206064 Alpine North LTD
AS20766 Association Gitoyen
AS207740 Youssef Hamed
AS20932 Services Industriels de Geneve
AS2119 Telenor Norge AS
AS24482 SG.GS
AS24961 myLoc managed IT AG
AS25091 IP-Max SA
AS25160 Vorboss Limited
AS25220 equada network GmbH
AS28917 Fiord Networks, UAB
AS2914 NTT America, Inc.
AS29140 Hostserver GmbH
AS29632 Netassist Limited
AS30132 Internet Systems Consortium, Inc.
AS30781 Jaguar Network SAS
AS31019 Paulus M. Hoogsteder
AS31500 Global Network Management Inc
AS3214 xTom GmbH
AS3257 GTT Communications Inc.
AS328832 Network Platforms (PTY) LTD
AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS34224 Neterra Ltd.
AS34288 Kantonsschule Zug
AS34549 meerfarbig GmbH & Co. KG
AS34854 Staclar Carrier Ltd.
AS34927 iFog GmbH
AS35280 F5 Networks SARL
AS35598 Inetcom LLC
AS36236 NetActuate, Inc
AS37468 Angola Cables
AS37497 Network Platforms (PTY) LTD
AS37721 Virtual Technologies & Solutions
AS39120 Convergenze S.p.A.
AS39122 Blacknight Internet Solutions Limited
AS39351 31173 Services AB
AS41327 Fiber Telecom S.p.A.
AS41805 SAWAD LAND for Information Technology Ltd
AS41913 Computerline GmbH
AS42708 GleSYS AB
AS43531 BSO Network Solutions SAS
AS44103 Rick Bakker trading as Bakker IT
AS4455 IX Reach Ltd
AS47147 ANEXIA Internetdienstleistungs GmbH
AS47158 IT LTD
AS47957 Compagnie Industrielle Et Financiere D' Ingenierie Ingenico SA
AS48362 Stadtwerke Feldkirch
AS48919 UACITY Ltd.
AS49605 Digital Telecommunication Services S.r.l.
AS50300 CustodianDC Limited
AS50304 Blix Solutions AS
AS50629 LWLcom GmbH
AS50673 Serverius
AS51184 Fonira Telekom GmbH
AS51185 Onecom Global Communications LTD
AS56655 TerraHost AS
AS56662 Marcin Gondek
AS57463 NetIX Communications JSC
AS58057 Securebit AG
AS58299 Openfactory GmbH
AS59890 Kabel-TV Lampert GmbH & Co KG
AS60501 Sirius Technology SRL
AS6057 Administracion Nacional de Telecomunicaciones
Get all this data and more in JSON format using our ASN API Read More


There are 3 upstreams for this ASN.

upstreams Name
AS1239 Sprint
AS2914 NTT America, Inc.
AS3257 GTT Communications Inc.
Get all this data and more in JSON format using our ASN API Read More


There are 23 downstreams for this ASN.

Downstreams Name
AS1239 Sprint
AS12902 B.V.
AS199670 DNS-Belgium
AS203234 Coosto BV
AS205668 Green Mini host BV
AS206637 CSL (DualCom) Limited
AS20953 Holding B.V.
AS210449 SkylarNET B.V
AS2914 NTT America, Inc.
AS31019 Paulus M. Hoogsteder
AS3257 GTT Communications Inc.
AS35421 Data Management Professionals B.V.
AS39855 Mod Mission Critical LLC
AS399810 UnitedLayer, LLC
AS42703 ICT Combinatie B.V.
AS50119 Smith Computer Centrum Computers BV
AS57129 GidPro BV
AS60131 High5! B.V.
AS60358 B.V.
AS60479 BV
AS61180 A2B IP B.V.
AS64404 Stichting EventInfra
AS8298 Pim van Pelt
Get all this data and more in JSON format using our ASN API Read More

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS51088 at robtex.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs