subnet.im

AS203833firstcolo GmbH

GermanyRegistryRIPE NCC

As of 10th November 2026, AS203833 (firstcolo GmbH), a network registered in Germany with RIPE NCC, originates 7 IPv4 prefixes covering 2.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 22,787th-largest of the 80,733 networks we see originating IPv4, and the 759th-largest of 2,330 in Germany. It is seen behind 1 upstream network, most often AS42473 (Anexia Cloud Solutions GmbH). 50% of its announcements have 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

7

IPv6 prefixes

1

IPv4 addresses

2.8k

IPv6 /64s

65.5k

Upstream graph

The networks AS203833 is seen behind, one and two hops out, drawn from real AS paths.

AS203833Toward the internet core
Upstream graph for AS203833: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS203833firstcolo GmbHThis networkAS42473Anexia Cloud Solu…AS1299Arelion (fka. Tel…AS47147Anexia Cloud Solu…

Networks observed one and two hops upstream of AS203833 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS203833
NetworkCountryRelationshipPathsVantage pts
AS42473Anexia Cloud Solutions GmbHATPeer595139

Prefixes

The largest blocks AS203833 originates, widest first.

Largest prefixes originated by AS203833
PrefixAddressesVisibility
159.100.24.0/221k76/76
79.133.32.0/2351276/76
5.187.28.0/2425676/76
79.133.43.0/2425676/76
109.169.80.0/2425676/76
168.81.255.0/2425676/76
196.18.175.0/2425676/76
2a00:11c0:38::/4865.5k × /6463/63

Routing health

How AS203833'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

  • Valid50.0%4
  • Invalid0.0%0
  • No ROA50.0%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS203833 started or stopped in this period.

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