58291 COLOCENTER, NL
Adjacency: 7 Upstream: 3 Downstream: 4
Upstream Adjacent AS list
AS213753 INTEREDGE, NL
AS174 COGENT-174 - Cogent Communications, LLC, US
AS6830 LIBERTYGLOBAL Liberty Global formerly UPC Broadband Holding, aka AORTA, NL
Downstream Adjacent AS list
AS206009 KAVOS, NL
AS209675 AxisNetworks, NL
AS207489 RDKIT, NL
AS59929 FLEXIBELT, NL
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 12903 AS58291 ORG+TRN Originate: 7168 /19.19 Transit: 1024 /22.00 COLOCENTER, 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 % 50604 AS58291 COLOCENTER, NL 6 0 0 6 0 0.00% Prefix AS Path Aggregation Suggestion 5.39.184.0/21 4777 2516 6830 58291 45.11.28.0/22 4777 2497 174 58291 185.79.152.0/22 4777 2516 6830 58291 185.102.68.0/22 4777 2516 6830 58291 185.140.184.0/22 4777 2516 6830 58291 213.156.28.0/22 4777 2516 6830 58291
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS58291 1 More Specifics 6 Total Advertisements COLOCENTER, NL
213.156.28.0/22 213.156.16.0/20
whois: 402332
IANA has recorded AS58291 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS58291\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 'AS57975 - AS58367'
as-block: AS57975 - AS58367
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: 2025-04-24T14:15:44Z
last-modified: 2025-04-24T14:15:44Z
source: RIPE
% Information related to 'AS58291'
% Abuse contact for 'AS58291' is 'abuse@colocenter.nl'
aut-num: AS58291
as-name: ColoCenter
org: ORG-Cb42-RIPE
import: from AS174 accept ANY
export: to AS174 announce AS58291
import: from AS58272 accept ANY
export: to AS58272 announce ANY
import: from AS6939 accept ANY
export: to AS6939 announce ANY
import: from AS6777 accept ANY
export: to AS6777 announce ANY
import: from AS20562 accept ANY
export: to AS20562 announce ANY
import: from AS34307 accept ANY
export: to AS34307 announce ANY
import: from AS51942 accept ANY
export: to AS51942 announce ANY
import: from AS213035 accept ANY
export: to AS213035 announce ANY
import: from AS212591 accept ANY
export: to AS212591 announce ANY
admin-c: AL9611-RIPE
tech-c: AL9611-RIPE
import: from AS38965 accept ANY
export: to AS38965 announce ANY
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: mnt-colo
created: 2012-06-15T13:08:24Z
last-modified: 2026-03-24T22:09:19Z
source: RIPE
import: from AS59929 accept ANY
export: to AS59929 announce ANY
import: from AS50952 accept ANY
export: to AS50952 announce ANY
import: from AS56584 accept ANY
export: to AS56584 announce ANY
import: from AS206221 accept ANY
export: to AS206221 announce ANY
import: from AS209675 accept ANY
export: to AS209675 announce ANY
import: from AS213753 accept ANY
import: from AS210335 accept ANY
export: to AS213753 announce ANY
export: to AS210335 announce ANY
export: to AS24785 announce ANY
import: from AS24785 accept ANY
export: to AS6830 announce ANY
import: from AS6830 accept ANY
organisation: ORG-Cb42-RIPE
org-name: ColoCenter b.v.
country: NL
org-type: LIR
address: Heliumstraat 200
address: 2718 RS
address: Zoetermeer
address: NETHERLANDS
phone: +31797113500
abuse-c: AR16150-RIPE
tech-c: AL9611-RIPE
admin-c: AL9611-RIPE
mnt-ref: mnt-colo
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MNT-COLO
created: 2012-05-10T08:57:35Z
last-modified: 2025-05-30T09:18:07Z
source: RIPE # Filtered
%ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
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