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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

AS20810 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS20810"
JSON Docs

Warning: AS20810 (Netcom-Kassel Netcom Kassel Gesellschaf…) announces 9 IPv4 and 2 IPv6 prefixes. 1 warning

AS pageAS20810
HolderNetcom-Kassel Netcom Kassel Gesellschaft fuer Telekommunikation mbH
AllocationRIPE NCC, Germany (DE), allocated 2001-06-06
Prefixes (IPv4 / IPv6)9 / 2
RPKI valid100% (11 / 11)
Upstreams and peers49
Peering policyOpen

What to fix

  1. Warning

    No public NOC, policy or technical contact.

    Other networks use these addresses to set up peering and to reach you during an incident.

    Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.

    Open in PeeringDB lookup

Checks

Routing and RPKI AS20810 announces 9 IPv4 and 2 IPv6 prefixes.
  • Pass: AS20810 announces 9 IPv4 and 2 IPv6 prefixes.
  • Pass: All 11 announced prefixes are RPKI valid.
  • Pass: Every announced prefix has an IRR route object.
  • Info: 49 upstreams and peers, 1 downstream networks seen.
HolderNetcom-Kassel Netcom Kassel Gesellschaft fuer Telekommunikation mbH
IPv4 prefixes9
IPv6 prefixes2
RPKI11 valid
Downstream networks1

Upstreams and peers seen to the left 49

AS5405 Inter.link AS6939 Hurricane Electric AS33891 Core-Backbone AS13030 Init7 AS35280 F5 Inc. AS34019 Hivane AS34549 meerfarbig GmbH & Co. KG AS35625 Eurofiber France AS37468 Angola Cables AS4230 Claro AS12779 IT.Gate AS14840 BR.Digital

Announced prefixes 11

45.138.56.0/22 45.158.172.0/22 80.69.192.0/20 149.249.32.0/20 185.158.180.0/22 188.74.0.0/19 193.29.228.0/24 194.113.115.0/24 212.102.118.0/24 2a03:7500::/29 2a03:7500::/32

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.
NameNetcom-Kassel
HandleAS20810
RangeAS20810
Statusactive
Registered1970-01-01T00:00:00Z
Last changed2026-11-04T08:46:33Z
Abuse contactabuse@netcom-kassel.de
Allocation
Registry (RIR)RIPE NCC
CountryGermany (DE)
Delegated on2001-06-06
StatusAllocated
Delegated rangeAS20810

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

Contacts
RoleNameEmail
registrant NCK-RR-MNT
registrant Netcom Kassel Gesellschaft fuer Telekommunikation mbH
registrant RIPE-NCC-END-MNT
abuse Netcom Abuse abuse@netcom-kassel.de

Source: https://rdap.db.ripe.net/autnum/20810. 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 No public NOC, policy or technical contact.
  • Pass: AS20810 is in PeeringDB as Netcom Kassel.
  • Info: Peering policy: Open.
  • Info: Present at 1 internet exchanges with 2 ports (140G in total).
  • Warning: No public NOC, policy or technical contact.
NetworkNetcom Kassel (Netcom Kassel Gesellschaft für Telekommunikation mbH)
AS numberAS20810
TypeCable/DSL/ISP, Regional
Websitehttps://netcom-kassel.de/
IRR as-setRIPE::AS20810:AS-NETCOM
Prefixes (IPv4 / IPv6)100 / 50
TrafficMostly Inbound
Peering policyOpen
LocationsNot Required
Ratio requiredNo
ContractsNot Required
Last updated2026-11-04

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup