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AS1887NAUKOWA I AKADEMICKA SIEC KOMPUTEROWA - PANSTWOWY INSTYTUT BADAWCZY

PolandRegistryRIPE NCCTypeEyeball

As of 11th November 2026, AS1887 (NAUKOWA I AKADEMICKA SIEC KOMPUTEROWA -…), an access network registered in Poland with RIPE NCC, originates 2 IPv4 prefixes covering 81.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,777th-largest of the 80,743 networks we see originating IPv4, and the 21st-largest of 2,109 in Poland. It is seen behind 2 upstream networks, most often AS8501 (Institute of Bioorganic Chemistry…) and AS5617 (Orange Polska Spolka Akcyjna), and in front of 24 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

1

IPv4 addresses

81.9k

IPv6 /64s

4.3B

Upstream graph

The networks AS1887 is seen behind, one and two hops out, drawn from real AS paths.

AS1887Toward the internet core
Upstream graph for AS1887: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1887NAUKOWA I AKADEMI…This networkAS5617Orange Polska Spo…AS8501Institute of Bioo…AS1299Arelion (fka. Tel…AS5511Orange S.A.AS2603NORDUnetAS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS1887 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

52

adjacent networks

Upstreams
24%
Peers
2650%
Downstreams
2446%

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

Upstreams of AS1887
NetworkCountryRelationshipPathsVantage pts
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterPLPeer2,052136
AS5617Orange Polska Spolka AkcyjnaPLPeer282

Prefixes

The largest blocks AS1887 originates, widest first.

Largest prefixes originated by AS1887
PrefixAddressesVisibility
148.81.0.0/1665.5k75/76
195.187.64.0/1816.4k75/76
2a00:1488::/324.3B × /6461/63

Routing health

How AS1887'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%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS1887 started or stopped in this period.

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