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AS12337noris network AG

GermanyRegistryRIPE NCCTypeEyeball

As of 29th September 2026, AS12337 (noris network AG), an access network registered in Germany with RIPE NCC, originates 78 IPv4 prefixes covering 118k addresses and 16 IPv6 prefixes. By IPv4 address space that makes it the 2,163rd-largest of the 79,607 networks we see originating IPv4, and the 62nd-largest of 2,290 in Germany. It is seen behind 38 upstream networks, most often AS33891 (Core-Backbone GmbH) and AS5405 (Inter.link GmbH), and in front of 28 downstream networks. 73% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 99% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

78

IPv6 prefixes

16

IPv4 addresses

118k

IPv6 /64s

4.3B

Upstream graph

The networks AS12337 is seen behind, one and two hops out, drawn from real AS paths.

AS12337Toward the internet core
Upstream graph for AS12337: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12337noris network AGThis networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3320Deutsche Telekom …AS5405Inter.link GmbHAS33891Core-Backbone GmbHAS3130RGnet OUAS13030Init7 (Switzerlan…AS49544i3D.net B.VAS3491PCCW Global (HK) …AS13237euNetworks GmbHAS6667Elisa OyjAS24940Hetzner Online Gm…

Networks observed one and two hops upstream of AS12337 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

242

adjacent networks

Upstreams
3816%
Peers
17673%
Downstreams
2812%

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

Upstreams of AS12337
NetworkCountryRelationshipPathsVantage pts
AS33891Core-Backbone GmbHDEPeer2,724147
AS5405Inter.link GmbHDEPeer1,986147
AS2914NTT America, Inc.USPeer1,516145
AS1299Arelion (fka. Telia Carrier)SEPeer933147
AS3320Deutsche Telekom AGDEPeer3049
AS13030Init7 (Switzerland) Ltd.CHPeer2564
AS6939Hurricane Electric LLCUSPeer2457
AS38880Micron21 Datacentre Pty LtdAUPeer2332
AS7713PT Telkom Indonesia TbkIDPeer2113
AS174Cogent Communications, LLCUSPeer175142

Prefixes

All 94

The largest blocks AS12337 originates, widest first.

Largest prefixes originated by AS12337
PrefixAddressesVisibility
213.95.0.0/1665.5k82/82
62.128.0.0/198.2k82/82
213.155.64.0/198.2k82/82
213.183.0.0/198.2k82/82
89.250.128.0/204.1k82/82
45.88.236.0/221k82/82
45.146.16.0/221k82/82
185.227.12.0/221k82/82
188.92.112.0/221k82/82
45.91.196.0/2351282/82

Routing health

How AS12337'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

  • Valid73.4%69
  • Invalid1.1%1
  • No ROA25.5%24

Propagation

  • Globally propagated90% of full-feed peers or more98.9%93
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.1%1

Prefix sizes

IPv4 — 78 prefixes

IPv6 — 16 prefixes

  • /324.3B × /646.3%1
  • /4016.8M × /6412.5%2
  • /441M × /646.3%1
  • /4865.5k × /6475.0%12

Recent changes

Announcements that started or stopped since 30th Aug 2026.

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