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AS58087Florian Kolb

GermanyRegistryRIPE NCC

As of 27th September 2026, AS58087 (Florian Kolb), a network registered in Germany with RIPE NCC, originates 31 IPv4 prefixes covering 8.4k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 11,627th-largest of the 79,536 networks we see originating IPv4, and the 421st-largest of 2,288 in Germany. It is seen behind 1 upstream network, most often AS203446 (SMARTNET Germany GmbH), and in front of 3 downstream networks. 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

31

IPv6 prefixes

5

IPv4 addresses

8.4k

IPv6 /64s

328k

Upstream graph

The networks AS58087 is seen behind, one and two hops out, drawn from real AS paths.

AS58087Toward the internet core
Upstream graph for AS58087: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS58087Florian KolbThis networkAS203446SMARTNET Germany …AS3257GTT Communication…AS6830Liberty Global Eu…

Networks observed one and two hops upstream of AS58087 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

8

adjacent networks

Upstreams
113%
Peers
450%
Downstreams
338%

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

Upstreams of AS58087
NetworkCountryRelationshipPathsVantage pts
AS203446SMARTNET Germany GmbHDEPeer3,245146

Prefixes

All 36

The largest blocks AS58087 originates, widest first.

Largest prefixes originated by AS58087
PrefixAddressesVisibility
38.87.116.0/2351282/82
45.90.98.0/2351282/82
5.253.247.0/2425682/82
37.114.37.0/2425682/82
37.114.46.0/2425682/82
37.114.50.0/2425682/82
37.114.63.0/2425682/82
37.221.93.0/2425682/82
38.97.56.0/2425682/82
45.10.21.0/2425682/82

Routing health

How AS58087'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%36
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%36
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 31 prefixes

IPv6 — 5 prefixes

  • /4865.5k × /64100.0%5

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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