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Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

IP address, prefix or AS number

AS58291 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS58291"
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Warning: AS58291 (ColoCenter ColoCenter b.v.) announces 16 IPv4 and 3 IPv6 prefixes. 1 warning

AS pageAS58291
HolderColoCenter ColoCenter b.v.
AllocationRIPE NCC, Netherlands (NL), allocated 2012-06-15
Prefixes (IPv4 / IPv6)16 / 3
RPKI valid95% (18 / 19)
Upstreams and peers54
Peering policyOpen

What to fix

  1. Warning

    1 of 19 announced prefixes have no ROA (RPKI not found): 2001:67c:cdc::/48.

    Without a ROA, networks cannot tell your routes from a hijack.

    Fix: Create a ROA for each at your RIR portal, with origin AS58291 and a max length equal to the prefix length:

    2001:67c:cdc::/48 AS58291 max-length /48

    Open in RPKI / ROA validator Guide

Checks

Routing and RPKI 1 of 19 announced prefixes have no ROA (RPKI not found): 2001:67c:cdc::/48.
  • Pass: AS58291 announces 16 IPv4 and 3 IPv6 prefixes.
  • Warning: 1 of 19 announced prefixes have no ROA (RPKI not found): 2001:67c:cdc::/48.
  • Info: 18 of 19 announced prefixes are RPKI valid.
  • Pass: Every announced prefix has an IRR route object.
  • Info: 54 upstreams and peers, 8 downstream networks seen.
HolderColoCenter ColoCenter b.v.
IPv4 prefixes16
IPv6 prefixes3
RPKI18 valid · 1 not found
Downstream networks8
Routes to fix
PrefixRPKI
2001:67c:cdc::/48 No ROA

Upstreams and peers seen to the left 54

AS6204 ZET.NET AS174 Cogent Communications, Inc. AS213753 InterEdge B.V. AS20562 Open Peering AS6939 Hurricane Electric AS24785 Joint Transit AS6830 Liberty Global AS25091 IP-Max SA AS37468 Angola Cables AS50304 Blix Solutions AS AS33891 Core-Backbone AS47692 Nessus GmbH

Announced prefixes 19

5.39.184.0/21 5.253.237.0/24 23.230.52.0/24 45.43.153.0/24 45.141.20.0/24 91.205.193.0/24 92.60.66.0/24 104.165.118.0/24 142.252.94.0/24 156.67.120.0/24 185.79.152.0/22 185.102.68.0/22 185.140.184.0/22 199.104.32.0/24 213.156.28.0/22 216.172.144.0/24 2a01:4c01::/32 2a02:f640::/29 2001:67c:cdc::/48

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup
Registration Found at rdap.db.ripe.net.
  • Pass: Found at rdap.db.ripe.net.
NameColoCenter
HandleAS58291
RangeAS58291
Statusactive
Registered2012-06-15T13:08:24Z
Last changed2026-11-09T19:58:18Z
Abuse contactabuse@colocenter.nl
Allocation
Registry (RIR)RIPE NCC
CountryNetherlands (NL)
Delegated on2012-06-15
StatusAllocated
Delegated rangeAS58291

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts
RoleNameEmail
registrant MNT-COLO
registrant ColoCenter b.v.
registrant RIPE-NCC-END-MNT
abuse Abuse-C Role abuse@colocenter.nl

Source: https://rdap.db.ripe.net/autnum/58291. Registration data from rdap.db.ripe.net, shown under its terms of use (terms): not for marketing or bulk collection. Personal contacts in this registry are not shown.

Open in WHOIS / RDAP lookup
PeeringDB AS58291 is in PeeringDB as ColoCenter.
  • Pass: AS58291 is in PeeringDB as ColoCenter.
  • Info: Peering policy: Open.
  • Info: Present at 9 internet exchanges with 9 ports (180G in total).
NetworkColoCenter
AS numberAS58291
TypeContent, Europe
Websitehttp://www.colocenter.nl
IRR as-setRIPE::AS-COLOCENTER
Prefixes (IPv4 / IPv6)200 / 15
Traffic50-100Gbps, Mostly Outbound
Peering policyOpen
LocationsNot Required
Ratio requiredNo
ContractsNot Required
Last updated2026-08-28
Contacts
NOCnoc@colocenter.nl
Salesinfo@colocenter.nl

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup