asn.dev

Observed topology

AS1887 NASK-ACADEMIC

Unclassified RIPE

Upstreams 2 carry this network
Downstreams 24 this network carries
Adjacent (IPv4) 26
Adjacent (IPv6) 3
Upstream graph Who carries AS1887, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS1887 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS1887: 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.

ASNetworkTypeFamiliesPaths seen
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterEducationIPv4 IPv6159
AS5617Orange Polska Spolka AkcyjnaMobileIPv42

Transit

Downstream networks

All 24

Networks for which AS1887 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS15665Instytut Geofizyki PANUnclassifiedIPv4306
AS44959Uniwersytet Kardynala Stefana WyszynskiegoUnclassifiedIPv4189
AS12464Politechnika WarszawskaUnclassifiedIPv4147
AS196802Wojskowa Akademia Techniczna im. Jaroslawa DabrowskiegoUnclassifiedIPv4126
AS197982Polsko-Japonska Wyzsza Szkola Technik KomputerowychUnclassifiedIPv4111
AS8766Szkola Glowna Handlowa w WarszawieEducationIPv463
AS41092INSTITUTE OF TUBERCULOSIS AND LUNG DISEASESUnclassifiedIPv463
AS197005Instytut Ekonomiki Rolnictwa i Gospodarki Zywnosciowej Panstwowy Instytut BadawczyUnclassifiedIPv463
AS201305WOJSKOWY INSTYTUT LACZNOSCIUnclassifiedIPv463
AS207204Centrum Nauki KopernikUnclassifiedIPv463

All 24 downstreams →

Adjacency

Adjacent networks

All 26

Every AS seen directly next to AS1887 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterEducationIPv4 IPv61,646
AS15665Instytut Geofizyki PANUnclassifiedIPv4306
AS44959Uniwersytet Kardynala Stefana WyszynskiegoUnclassifiedIPv4189
AS12464Politechnika WarszawskaUnclassifiedIPv4147
AS196802Wojskowa Akademia Techniczna im. Jaroslawa DabrowskiegoUnclassifiedIPv4126
AS197982Polsko-Japonska Wyzsza Szkola Technik KomputerowychUnclassifiedIPv4111
AS8766Szkola Glowna Handlowa w WarszawieEducationIPv463
AS41092INSTITUTE OF TUBERCULOSIS AND LUNG DISEASESUnclassifiedIPv463
AS197005Instytut Ekonomiki Rolnictwa i Gospodarki Zywnosciowej Panstwowy Instytut BadawczyUnclassifiedIPv463
AS201305WOJSKOWY INSTYTUT LACZNOSCIUnclassifiedIPv463

All 26 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.