asn.dev

Observed topology

AS15305 SYRINGANETWORKS - Syringa Networks, LLC

Unclassified ARIN

Upstreams 6 carry this network
Downstreams 55 this network carries
Adjacent (IPv4) 61
Adjacent (IPv6) 16
Upstream graph Who carries AS15305, and who carries them, drawn as a map up to the transit-free core. 10 exchanges Where AS15305 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS15305: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6799
AS174Cogent Communications, LLCTransitIPv4 IPv6363
AS6939Hurricane Electric LLCTransitIPv4 IPv6241
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv627
AS53767iCastCenterHostingIPv423
AS3303Swisscom (Schweiz) AGResidentialIPv422

Transit

Downstream networks

All 55

Networks for which AS15305 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS26223Silver Star CommunicationsResidentialIPv4 IPv61,897
AS19218Midvale Telephone Exchange, IncorporatedUnclassifiedIPv4 IPv61,176
AS54847Custer Telephone Cooperative, Inc.UnclassifiedIPv4 IPv6990
AS30530Farmers Mutual Telephone CompanyUnclassifiedIPv4 IPv6888
AS32922ATC CommunicationsUnclassifiedIPv4 IPv6850
AS397268Cambridge TelephoneUnclassifiedIPv4563
AS397740Mudlake TelephoneUnclassifiedIPv4513
AS17380Project Mutual Telephone Cooperative Association, Inc.UnclassifiedIPv4502
AS20295Filer Mutual Telephone CompanyUnclassifiedIPv4 IPv6376
AS395107RTIUnclassifiedIPv4304

All 55 downstreams →

Adjacency

Adjacent networks

All 61

Every AS seen directly next to AS15305 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv67,369
AS174Cogent Communications, LLCTransitIPv4 IPv62,810
AS6939Hurricane Electric LLCTransitIPv4 IPv62,549
AS26223Silver Star CommunicationsResidentialIPv4 IPv61,904
AS19218Midvale Telephone Exchange, IncorporatedUnclassifiedIPv4 IPv61,176
AS54847Custer Telephone Cooperative, Inc.UnclassifiedIPv4 IPv6990
AS30530Farmers Mutual Telephone CompanyUnclassifiedIPv4 IPv6888
AS32922ATC CommunicationsUnclassifiedIPv4 IPv6850
AS17380Project Mutual Telephone Cooperative Association, Inc.UnclassifiedIPv4590
AS397268Cambridge TelephoneUnclassifiedIPv4563

All 61 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.