asn.dev

Observed topology

AS50300 CUSTDC

Unclassified ARIN

Upstreams 28 carry this network
Downstreams 1,124 this network carries
Adjacent (IPv4) 1,098
Adjacent (IPv6) 882
Upstream graph Who carries AS50300, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS50300 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 28

Networks observed carrying traffic for AS50300: 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 IPv6438
AS3356Level 3 Parent, LLCTransitIPv4 IPv6397
AS174Cogent Communications, LLCTransitIPv4 IPv6321
AS2914NTT America, Inc.TransitIPv4 IPv6277
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6159
AS9002RETN LimitedUnclassifiedIPv4 IPv6155
AS3257GTT Communications Inc.TransitIPv4101
AS50304Blix Solutions ASUnclassifiedIPv476
AS24482SG.GSHostingIPv4 IPv645
AS48185team.blue NVUnclassifiedIPv4 IPv645

All 28 upstreams →

Transit

Downstream networks

All 1,124

Networks for which AS50300 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS16509Amazon.com, Inc.HostingIPv4 IPv64,978
AS9498BHARTI Airtel Ltd.MobileIPv4 IPv64,938
AS174Cogent Communications, LLCTransitIPv4 IPv64,369
AS13335Cloudflare, Inc.HostingIPv4 IPv62,162
AS3257GTT Communications Inc.TransitIPv4 IPv61,923
AS714Apple Inc.HostingIPv4 IPv61,696
AS2914NTT America, Inc.TransitIPv41,590
AS137409GSL Networks Pty LTDUnclassifiedIPv4 IPv61,493
AS5416B.S.C.UnclassifiedIPv4 IPv61,472
AS17557Pakistan Telecommunication Company LimitedUnclassifiedIPv41,294

All 1,124 downstreams →

Adjacency

Adjacent networks

All 1,098

Every AS seen directly next to AS50300 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3257GTT Communications Inc.TransitIPv4 IPv6314,664
AS3356Level 3 Parent, LLCTransitIPv4 IPv6257,210
AS2914NTT America, Inc.TransitIPv4 IPv6164,832
AS174Cogent Communications, LLCTransitIPv4 IPv6144,145
AS6939Hurricane Electric LLCTransitIPv4 IPv6121,675
AS9002RETN LimitedUnclassifiedIPv4 IPv651,003
AS9498BHARTI Airtel Ltd.MobileIPv4 IPv632,783
AS64049Reliance Jio Infocomm Pte Ltd SingaporeUnclassifiedIPv4 IPv610,283
AS57463NetIX Communications JSCUnclassifiedIPv4 IPv69,978
AS33891Core-Backbone GmbHHostingIPv4 IPv68,530

All 1,098 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.