51088 A2B, NL
Adjacency: 35 Upstream: 4 Downstream: 31
Upstream Adjacent AS list
AS3303 SWISSCOM Swisscom Switzerland Ltd, CH
AS207176 OPENFIBER, NL
AS8455 ATOM86-AS ATOM86, NL
AS3257 GTT-BACKBONE GTT, US
Downstream Adjacent AS list
AS201995 BRE-EFX, NL
AS8298 IPNG, CH
AS20953 INFONL-AS INFO, Amsterdam, The Netherlands, NL
AS199670 DNS-ANYCAST DNS.be Anycast - Toplevel .be domain registry, BE
AS207179 WILROFF, NL
AS3257 GTT-BACKBONE GTT, US
AS205668 GREENMINIHOST, NL
AS57129 GIDPRO, NL
AS399810 LAER-AS-AMS1, US
AS39855 MOD-EU, US
AS60358 MCCLOUD, NL
AS15562 SNIJDERS, NL
AS12902 LUNA, NL
AS202656 XSERVER-EUROPE, UA
AS199292 --No Registry Entry--
AS213577 --No Registry Entry--
AS213773 BLUEM-AS, NL
AS210449 SKYLARNET-, NL
AS31019 MEANIE Meanie Heavy Industries, NL
AS42703 CLOUDICTION, NL
AS50559 DIVD, NL
AS50119 SCC, NL
AS35027 ASN-SEVENP, NL
AS24642 NL-CAVEO, NL
AS214988 SOLIT, NL
AS60479 EXCL-AS, NL
AS60131 HIGH5-, NL
AS52199 ARKIN, NL
AS973 REVIVE-IT-NETWORK, US
AS52102 TRIBION, NL
AS203919 SCRYABIN-DENIS-DMITRIEVICH, RU
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 5196 AS51088 ORG+TRN Originate: 34304 /16.93 Transit: 20480 /17.68 A2B, NL
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 3882 AS51088 A2B, NL 57 18 4 43 14 24.56% Prefix AS Path Aggregation Suggestion 5.10.192.0/24 3303 51088 31.41.255.0/24 3303 51088 31.134.200.0/21 3303 51088 45.85.191.0/24 3303 51088 46.175.131.0/24 3303 51088 46.244.0.0/20 3303 51088 + Announce - aggregate of 46.244.0.0/21 (3303 51088) and 46.244.8.0/21 (3303 51088) 46.244.0.0/21 3303 51088 - Withdrawn - aggregated with 46.244.8.0/21 (3303 51088) 46.244.8.0/22 3303 51088 - Withdrawn - aggregated with 46.244.12.0/22 (3303 51088) 46.244.12.0/23 3303 51088 - Withdrawn - aggregated with 46.244.14.0/23 (3303 51088) 46.244.14.0/23 3303 51088 - Withdrawn - aggregated with 46.244.12.0/23 (3303 51088) 46.244.16.0/23 3303 51088 46.244.20.0/22 3303 51088 + Announce - aggregate of 46.244.20.0/23 (3303 51088) and 46.244.22.0/23 (3303 51088) 46.244.20.0/24 3303 51088 - Withdrawn - aggregated with 46.244.21.0/24 (3303 51088) 46.244.21.0/24 3303 51088 - Withdrawn - aggregated with 46.244.20.0/24 (3303 51088) 46.244.22.0/24 3303 51088 - Withdrawn - aggregated with 46.244.23.0/24 (3303 51088) 46.244.23.0/24 3303 51088 - Withdrawn - aggregated with 46.244.22.0/24 (3303 51088) 46.244.24.0/21 3303 51088 + Announce - aggregate of 46.244.24.0/22 (3303 51088) and 46.244.28.0/22 (3303 51088) 46.244.24.0/22 3303 51088 - Withdrawn - aggregated with 46.244.28.0/22 (3303 51088) 46.244.28.0/24 3303 51088 - Withdrawn - aggregated with 46.244.29.0/24 (3303 51088) 46.244.29.0/24 3303 51088 - Withdrawn - aggregated with 46.244.28.0/24 (3303 51088) 46.244.30.0/24 3303 51088 - Withdrawn - aggregated with 46.244.31.0/24 (3303 51088) 46.244.31.0/24 3303 51088 - Withdrawn - aggregated with 46.244.30.0/24 (3303 51088) 46.244.100.0/22 3303 51088 46.244.104.0/22 3303 51088 46.244.112.0/23 3303 51088 46.244.120.0/21 3303 51088 + Announce - aggregate of 46.244.120.0/22 (3303 51088) and 46.244.124.0/22 (3303 51088) 46.244.120.0/23 3303 51088 - Withdrawn - aggregated with 46.244.122.0/23 (3303 51088) 46.244.122.0/23 3303 51088 - Withdrawn - aggregated with 46.244.120.0/23 (3303 51088) 46.244.124.0/23 3303 51088 - Withdrawn - aggregated with 46.244.126.0/23 (3303 51088) 46.244.126.0/24 3303 51088 - Withdrawn - aggregated with 46.244.127.0/24 (3303 51088) 46.244.127.0/24 3303 51088 - Withdrawn - aggregated with 46.244.126.0/24 (3303 51088) 62.3.55.0/24 3303 51088 62.68.84.0/24 3303 51088 91.213.13.0/24 3303 51088 93.93.120.0/21 3303 51088 93.190.124.0/24 3303 51088 146.19.97.0/24 3303 51088 178.211.151.0/24 3303 51088 178.249.152.0/21 3303 51088 185.30.204.0/22 3303 51088 185.34.220.0/22 3303 51088 185.37.4.0/23 3303 51088 185.37.6.0/24 3303 51088 185.40.254.0/24 3303 51088 185.41.124.0/22 3303 51088 185.44.244.0/22 3303 51088 185.46.173.0/24 3303 51088 185.51.52.0/23 3303 51088 185.63.244.0/22 3303 51088 185.205.52.0/22 3303 51088 185.217.118.0/24 3303 51088 185.218.207.0/24 3303 51088 185.225.220.0/22 3303 51088 185.240.112.0/22 3303 51088 188.95.143.0/24 3257 51088 192.166.96.0/22 3303 51088 193.39.250.0/24 3303 51088 193.108.238.0/24 3303 51088 193.110.189.0/24 3303 51088 193.169.108.0/23 3303 51088 212.24.126.0/24 3303 51088
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS51088 5 More Specifics 40 Total Advertisements A2B, NL
45.85.191.0/24 45.85.190.0/23
185.37.4.0/23 185.37.4.0/22
185.37.6.0/24 185.37.4.0/22
185.51.52.0/23 185.51.52.0/22
188.95.143.0/24 188.95.136.0/21
Prefixes added and withdrawn by this origin AS in the past 7 days.
- 77.246.245.0/24 Withdrawn
- 193.39.250.0/24 Withdrawn
whois: 402603
IANA has recorded AS51088 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS51088\n % This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html
% Note: this output has been filtered.
% Information related to 'AS50893 - AS51311'
as-block: AS50893 - AS51311
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: 2024-12-10T14:54:30Z
last-modified: 2024-12-10T14:54:30Z
source: RIPE
% Information related to 'AS51088'
% Abuse contact for 'AS51088' is 'abuse@a2b-internet.com'
aut-num: AS51088
as-name: A2B
org: ORG-AIB25-RIPE
remarks: ============================================================
remarks: AMS-IX peering
remarks: ============================================================
import: from AS51088:AS-PEERS-AMSIX action pref=80; accept ANY AND NOT {0.0.0.0/0}
export: to AS51088:AS-PEERS-AMSIX announce AS51088: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 AS51088: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
import: from AS50266 action pref=50; accept AS-TMNL
export: to AS50266 announce AS51088:AS-TMNL-IXP-PEERS
remarks: ============================================================
remarks: Transits
remarks: ============================================================
import: from AS2914 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export: to AS2914 announce AS51088:AS-A2B
import: from AS3257 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export: to AS3257 announce AS51088:AS-A2B
import: from AS8455 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export: to AS8455 announce AS51088:AS-A2B
remarks: ============================================================
remarks: Basic Interconnection Requirements
remarks: ============================================================
remarks:
remarks: The following is required to share a BGP session with
remarks: AS51088:
remarks:
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.
remarks:
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: 2026-01-20T11:49:39Z
source: RIPE
organisation: ORG-AIB25-RIPE
org-name: A2B IP B.V.
country: NL
reg-nr: 57220786
org-type: LIR
address: Science Park 402
address: 1098 XH
address: Amsterdam
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: 2021-08-13T08:11:29Z
last-modified: 2026-05-13T07:29:13Z
source: RIPE # Filtered
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 abuse@a2b-internet.com please
remarks: provide as much details and include full headers
remarks: and/or logfiles.
remarks: Peering questions / requests to peering@a2b-internet.com
remarks: Network questions / issues to noc@a2b-internet.com
remarks: The helpdesk can be reached at helpdesk@a2b-internet.com
remarks: http://www.a2b-internet.com/
remarks: ------------------------------------------------
admin-c: lauw42
tech-c: DDW67-RIPE
tech-c: lauw42
abuse-mailbox: abuse@a2b-internet.com
nic-hdl: AS51088-RIPE
mnt-by: A2B-INTERNET-MNT
created: 2010-05-28T17:13:29Z
last-modified: 2025-02-06T12:13:49Z
source: RIPE # Filtered
% This query was served by the RIPE Database Query Service version 1.122.1 (SHETLAND)