Observed topology

AS38987 OST-ASN Spoldzielnia Telekomuniacyjna OST

Residential RIPE

Upstreams 5 carry this network

Downstreams 3 this network carries

Adjacent (IPv4) 7

Adjacent (IPv6) 4

Upstream graph Who carries AS38987, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS38987 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS38987: 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
AS5617	Orange Polska Spolka Akcyjna	Mobile	IPv4 IPv6	172
AS20804	Exatel S.A.	Unclassified	IPv4 IPv6	87
AS3303	Swisscom (Schweiz) AG	Residential	IPv4	8
AS24482	SG.GS	Hosting	IPv4 IPv6	5
AS20473	The Constant Company, LLC	Hosting	IPv6	1

Transit

Downstream networks

inferred

Networks for which AS38987 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS31604	Intertele S.A.	Unclassified	IPv4	80
AS200609	CHDE Polska Spolka Akcyjna	Unclassified	IPv4	60
AS31381	Wyzsza Szkola Informatyki i Zarzadzania	Unclassified	IPv4	3

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS38987 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS20804	Exatel S.A.	Unclassified	IPv4 IPv6	219
AS5617	Orange Polska Spolka Akcyjna	Mobile	IPv4 IPv6	182
AS31604	Intertele S.A.	Unclassified	IPv4	80
AS200609	CHDE Polska Spolka Akcyjna	Unclassified	IPv4	60
AS3303	Swisscom (Schweiz) AG	Residential	IPv4	8
AS24482	SG.GS	Hosting	IPv4 IPv6	6
AS31381	Wyzsza Szkola Informatyki i Zarzadzania	Unclassified	IPv4	3
AS20473	The Constant Company, LLC	Hosting	IPv6	1

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-19 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M 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.