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AS214243Marc Fischer

GermanyRegistryRIPE NCC

As of 26th September 2026, AS214243 (Marc Fischer), a network registered in Germany with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 4 IPv6 prefixes. By IPv4 address space that makes it the 48,553rd-largest of the 79,516 networks we see originating IPv4, and the 1,536th-largest of 2,288 in Germany. It is seen behind 1 upstream network, most often AS203446 (SMARTNET Germany GmbH), and in front of 7 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

2

IPv6 prefixes

4

IPv4 addresses

512

IPv6 /64s

262k

Upstream graph

The networks AS214243 is seen behind, one and two hops out, drawn from real AS paths.

AS214243Toward the internet core
Upstream graph for AS214243: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS214243Marc FischerThis networkAS203446SMARTNET Germany …AS3257GTT Communication…AS6830Liberty Global Eu…

Networks observed one and two hops upstream of AS214243 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

16

adjacent networks

Upstreams
16%
Peers
850%
Downstreams
744%

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

Upstreams of AS214243
NetworkCountryRelationshipPathsVantage pts
AS203446SMARTNET Germany GmbHDEPeer927144

Prefixes

The largest blocks AS214243 originates, widest first.

Largest prefixes originated by AS214243
PrefixAddressesVisibility
5.231.234.0/2425681/81
77.90.4.0/2425681/81
2a0e:97c0:471::/4865.5k × /6463/64
2a0e:97c0:4c1::/4865.5k × /6463/64
2a0e:97c0:4c2::/4865.5k × /6463/64
2a0e:97c0:4c3::/4865.5k × /6463/64

Routing health

How AS214243'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%6
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 4 prefixes

  • /4865.5k × /64100.0%4

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS214243 started or stopped in this period.

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