subnet.im

AS20810Netcom Kassel Gesellschaft fuer Telekommunikation mbH

GermanyRegistryRIPE NCC

As of 26th September 2026, AS20810 (Netcom Kassel Gesellschaft fuer…), a network registered in Germany with RIPE NCC, originates 9 IPv4 prefixes covering 20.2k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 7,047th-largest of the 79,516 networks we see originating IPv4, and the 253rd-largest of 2,288 in Germany. It is seen behind 33 upstream networks, most often AS5405 (Inter.link GmbH) and AS6939 (Hurricane Electric LLC), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

2

IPv4 addresses

20.2k

IPv6 /64s

38.7B

Upstream graph

The networks AS20810 is seen behind, one and two hops out, drawn from real AS paths.

AS20810Toward the internet core
Upstream graph for AS20810: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS20810Netcom Kassel Ges…This networkAS5405Inter.link GmbHAS6939Hurricane Electri…AS7713PT Telkom Indones…AS13030Init7 (Switzerlan…AS33891Core-Backbone GmbHAS3491PCCW Global (HK) …AS13237euNetworks GmbHAS18106Viewqwest Pte LtdAS20130Depaul UniversityAS35280F5 Networks SARLAS6667Elisa OyjAS24940Hetzner Online Gm…

Networks observed one and two hops upstream of AS20810 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

171

adjacent networks

Upstreams
3319%
Peers
13780%
Downstreams
11%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS20810
NetworkCountryRelationshipPathsVantage pts
AS5405Inter.link GmbHDEPeer38042
AS6939Hurricane Electric LLCUSPeer9837
AS33891Core-Backbone GmbHDEPeer9612
AS7713PT Telkom Indonesia TbkIDPeer303
AS13030Init7 (Switzerland) Ltd.CHPeer244
AS18106Viewqwest Pte LtdSGPeer202
AS38880Micron21 Datacentre Pty LtdAUPeer202
AS14537Continent 8 LLCUSPeer143
AS7768Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERITRPeer122
AS8298IPng Networks GmbHCHPeer122

Prefixes

The largest blocks AS20810 originates, widest first.

Largest prefixes originated by AS20810
PrefixAddressesVisibility
188.74.0.0/198.2k81/81
80.69.192.0/204.1k81/81
149.249.32.0/204.1k81/81
45.138.56.0/221k81/81
45.158.172.0/221k81/81
185.158.180.0/221k81/81
193.29.228.0/2425681/81
194.113.115.0/2425681/81
212.102.118.0/2425681/81
2a03:7500::/2934.4B × /6463/64

Routing health

How AS20810's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%11
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%11
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 2 prefixes

  • /2934.4B × /6450.0%1
  • /324.3B × /6450.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Withdrawn2a03:7500::666/12821st Sept 2026

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.