Observed topology

AS12831 TASK-AS Technical University of Gdansk, Academic Computer Center TASK

Unclassified RIPE

Upstreams 2 carry this network

Downstreams 27 this network carries

Adjacent (IPv4) 30

Adjacent (IPv6) 4

Upstream graph Who carries AS12831, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS12831 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS12831: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

AS	Network	Type	Families	Paths seen
AS196844	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center	Unclassified	IPv4 IPv6	394
AS13293	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center	Unclassified	IPv4 IPv6	334

Transit

Downstream networks

All 27

Networks for which AS12831 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS31683	Zarzad Morskiego Portu Gdynia S.A	Unclassified	IPv4	234
AS34409	Polska Press Sp. z o.o.	Hosting	IPv4 IPv6	199
AS204360	Sumpto sp. z o.o.	Unclassified	IPv4	65
AS34069	Polskie Radio Regionalna Rozglosnia W Gdansku Radio Gdansk SA w Likwidacji	Unclassified	IPv4	58
AS48859	NET P.C. MACIEJ CZAPLUK	Unclassified	IPv4	58
AS211293	OSRODEK BADAWCZO-ROZWOJOWY CENTRUM TECHNIKI MORSKIEJ SA	Unclassified	IPv4	57
AS56408	Gdansk Airport Sp. z o.o.	Unclassified	IPv4	50
AS61319	Wojewodztwo Pomorskie	Unclassified	IPv4	50
AS29649	Limes sp. z o.o.	Unclassified	IPv4 IPv6	29
AS29103	Gdanska Stocznia "Remontowa" im. J.Pilsudskiego S.A.	Unclassified	IPv4	24

All 27 downstreams →

Adjacency

Adjacent networks

All 30

Every AS seen directly next to AS12831 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS196844	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center	Unclassified	IPv4 IPv6	970
AS13293	Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center	Unclassified	IPv4 IPv6	670
AS31683	Zarzad Morskiego Portu Gdynia S.A	Unclassified	IPv4	234
AS34409	Polska Press Sp. z o.o.	Hosting	IPv4 IPv6	200
AS204360	Sumpto sp. z o.o.	Unclassified	IPv4	65
AS34069	Polskie Radio Regionalna Rozglosnia W Gdansku Radio Gdansk SA w Likwidacji	Unclassified	IPv4	58
AS48859	NET P.C. MACIEJ CZAPLUK	Unclassified	IPv4	58
AS211293	OSRODEK BADAWCZO-ROZWOJOWY CENTRUM TECHNIKI MORSKIEJ SA	Unclassified	IPv4	57
AS56408	Gdansk Airport Sp. z o.o.	Unclassified	IPv4	50
AS61319	Wojewodztwo Pomorskie	Unclassified	IPv4	50

All 30 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.