asn.dev

Observed topology

AS3356 LEVEL3

Transit ARIN NSP

Upstreams 51 carry this network
Downstreams 6,437 this network carries
Adjacent (IPv4) 6,449
Adjacent (IPv6) 2,188
Upstream graph Who carries AS3356, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS3356 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 51

Networks observed carrying traffic for AS3356: 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
AS6939Hurricane Electric LLCTransitIPv4 IPv68,053
AS2914NTT America, Inc.TransitIPv4 IPv66,416
AS1299Arelion Sweden ABTransitIPv4 IPv65,943
AS174Cogent Communications, LLCTransitIPv4 IPv65,893
AS3549Level 3 Parent, LLCTransitIPv43,855
AS9002RETN LimitedUnclassifiedIPv4 IPv62,884
AS577Bell CanadaMobileIPv4 IPv62,071
AS3257GTT Communications Inc.TransitIPv4 IPv61,968
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv61,938
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv61,038

All 51 upstreams →

Transit

Downstream networks

All 6,437

Networks for which AS3356 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS749United States Department of Defense (DoD)UnclassifiedIPv4187,934
AS209CenturyLink Communications, LLCResidentialIPv4 IPv696,166
AS11492CABLE ONE, INC.ResidentialIPv484,643
AS19901BrightspeedResidentialIPv4 IPv676,690
AS34984Superonline Iletisim Hizmetleri A.S.MobileIPv4 IPv658,157
AS36992ETISALAT MISRMobileIPv4 IPv655,129
AS12479Orange Espagne SAResidentialIPv452,862
AS6327Shaw CommunicationsResidentialIPv446,750
AS10753Level 3 Parent, LLCUnclassifiedIPv445,848
AS8151UNINETMobileIPv445,565

All 6,437 downstreams →

Adjacency

Adjacent networks

All 6,449

Every AS seen directly next to AS3356 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3549Level 3 Parent, LLCTransitIPv4 IPv62,201,796
AS1299Arelion Sweden ABTransitIPv4 IPv61,070,835
AS174Cogent Communications, LLCTransitIPv4 IPv6946,361
AS2914NTT America, Inc.TransitIPv4 IPv6895,266
AS721United States Department of Defense (DoD)UnclassifiedIPv4 IPv6767,889
AS6939Hurricane Electric LLCTransitIPv4 IPv6749,826
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv6602,702
AS2152CENICUnclassifiedIPv4588,675
AS9002RETN LimitedUnclassifiedIPv4 IPv6569,706
AS132825MYTEK TRADING PTY LTDUnclassifiedIPv4557,296

All 6,449 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-11 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.47M 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.