asn.dev

Observed topology

AS1280 ISC-AS-1280 - Internet Systems Consortium, Inc.

Unclassified ARIN

Upstreams 7 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 10
Adjacent (IPv6) 6
Upstream graph Who carries AS1280, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS1280 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS1280: 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 IPv62,991
AS2914NTT America, Inc.TransitIPv4 IPv61,580
AS6939Hurricane Electric LLCTransitIPv4 IPv61,253
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv414
AS11164Internet2EducationIPv44
AS4637Telstra GlobalUnclassifiedIPv42
AS7922Comcast Cable Communications, LLCResidentialIPv41

Transit

Downstream networks

inferred

Networks for which AS1280 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS30133Internet Systems Consortium, Inc.UnclassifiedIPv4 IPv64,089
AS24151China Internet Network Infomation CenterUnclassifiedIPv4 IPv6610
AS3557Internet Systems Consortium, Inc.UnclassifiedIPv4 IPv624

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS1280 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv65,172
AS30133Internet Systems Consortium, Inc.UnclassifiedIPv4 IPv64,089
AS1299Arelion Sweden ABTransitIPv4 IPv63,508
AS2914NTT America, Inc.TransitIPv4 IPv61,851
AS24151China Internet Network Infomation CenterUnclassifiedIPv4 IPv6610
AS3557Internet Systems Consortium, Inc.UnclassifiedIPv4 IPv624
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv417
AS11164Internet2EducationIPv417
AS4637Telstra GlobalUnclassifiedIPv42
AS7922Comcast Cable Communications, LLCResidentialIPv41

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-01 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.48M 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.