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AS218781Adrian Grzeca

PolandRegistryRIPE NCC

As of 11th November 2026, AS218781 (Adrian Grzeca), a network registered in Poland with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,976th-largest of the 80,743 networks we see originating IPv4, and the 1,351st-largest of 2,109 in Poland. It is seen behind 3 upstream networks, most often AS34872 (Servperso Systems) and AS11967 (Hop179 OU). 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

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS218781 is seen behind, one and two hops out, drawn from real AS paths.

AS218781Toward the internet core
Upstream graph for AS218781: 7 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS218781Adrian GrzecaThis networkAS11967Hop179 OUAS34872Servperso SystemsAS214762Sebastian Stefane…AS215828Tizian Maxime Wei…AS6939Hurricane Electri…AS601443W Infra B.V.AS6204INTERKVM HOST SRL

Networks observed one and two hops upstream of AS218781 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS218781
NetworkCountryRelationshipPathsVantage pts
AS34872Servperso SystemsBEPeer6868
AS11967Hop179 OUEEPeer4444
AS214762Sebastian Stefanek trading as MatHost.euPLPeer2626

Prefixes

The largest blocks AS218781 originates, widest first.

Largest prefixes originated by AS218781
PrefixAddressesVisibility
44.32.184.0/2425676/76
2a14:7583:efd0::/4865.5k × /6462/63

Routing health

How AS218781'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%1
  • Invalid0.0%0
  • No ROA50.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS218781 started or stopped in this period.

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