asn.dev

Observed topology

AS57976 BLIZZARD Blizzard Entertainment, Inc

Hosting RIPE Content

Upstreams 84 carry this network
Downstreams 2 this network carries
Adjacent (IPv4) 76
Adjacent (IPv6) 49
Upstream graph Who carries AS57976, and who carries them, drawn as a map up to the transit-free core. 52 exchanges Where AS57976 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 84

Networks observed carrying traffic for AS57976: 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 IPv61,508
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,406
AS6939Hurricane Electric LLCTransitIPv4 IPv61,217
AS3786LG DACOM CorporationUnclassifiedIPv4951
AS4637Telstra GlobalUnclassifiedIPv4 IPv6552
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6512
AS17408AboveNet Communications TaiwanUnclassifiedIPv4431
AS9002RETN LimitedUnclassifiedIPv4 IPv6312
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6221
AS24482SG.GSHostingIPv4 IPv6160

All 84 upstreams →

Transit

Downstream networks

inferred

Networks for which AS57976 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS40551Activision Publishing, Inc.UnclassifiedIPv4290
AS60229Demonware LimitedUnclassifiedIPv631

Adjacency

Adjacent networks

All 86

Every AS seen directly next to AS57976 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv61,590
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,453
AS6939Hurricane Electric LLCTransitIPv4 IPv61,260
AS3786LG DACOM CorporationUnclassifiedIPv4951
AS4637Telstra GlobalUnclassifiedIPv4 IPv6597
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6537
AS17408AboveNet Communications TaiwanUnclassifiedIPv4431
AS9002RETN LimitedUnclassifiedIPv4 IPv6329
AS40551Activision Publishing, Inc.UnclassifiedIPv4290
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6227

All 86 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.