subnet.im

AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center

PolandRegistryRIPE NCC

As of 27th September 2026, AS8501 (Institute of Bioorganic Chemistry…), a network registered in Poland with RIPE NCC, originates 7 IPv4 prefixes covering 1.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 29,817th-largest of the 79,525 networks we see originating IPv4, and the 603rd-largest of 2,096 in Poland. It is seen behind 6 upstream networks, most often AS2603 (NORDUnet) and AS3356 (Lumen (Level 3)), and in front of 23 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

7

IPv6 prefixes

1

IPv4 addresses

1.8k

IPv6 /64s

537M

Upstream graph

The networks AS8501 is seen behind, one and two hops out, drawn from real AS paths.

AS8501Toward the internet core
Upstream graph for AS8501: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8501Institute of Bioo…This networkAS174Cogent Communicat…AS2603NORDUnetAS3356Lumen (Level 3)AS20965GEANT VerenigingAS21320GEANT VerenigingAS151326DCConnect Communi…AS1299Arelion (fka. Tel…AS3491PCCW Global (HK) …AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS293ESnetAS11537Internet2

Networks observed one and two hops upstream of AS8501 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

64

adjacent networks

Upstreams
69%
Peers
3555%
Downstreams
2336%

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

Upstreams of AS8501
NetworkCountryRelationshipPathsVantage pts
AS2603NORDUnetDKPeer4,53762
AS3356Lumen (Level 3)USPeer4,08374
AS174Cogent Communications, LLCUSPeer1,97439
AS21320GEANT VerenigingNLPeer83337
AS20965GEANT VerenigingNLPeer1972
AS1853ACONETATPeer662

Prefixes

The largest blocks AS8501 originates, widest first.

Largest prefixes originated by AS8501
PrefixAddressesVisibility
212.191.224.0/2425680/81
212.191.225.0/2425680/81
212.191.227.0/2425680/81
212.191.229.0/2425681/81
212.191.240.0/2425680/81
212.191.241.0/2425680/81
212.191.244.0/2425680/81
2001:b10:c000::/35537M × /6462/64

Routing health

How AS8501'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%8

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

  • /35537M × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS8501 started or stopped in this period.

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