asn.dev

Observed topology

AS63199 CDSC-AS1

Hosting ARIN NSP

Upstreams 50 carry this network
Downstreams 23 this network carries
Adjacent (IPv4) 72
Adjacent (IPv6) 31
Upstream graph Who carries AS63199, and who carries them, drawn as a map up to the transit-free core. 21 exchanges Where AS63199 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 50

Networks observed carrying traffic for AS63199: 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
AS174Cogent Communications, LLCTransitIPv4 IPv66,020
AS1299Arelion Sweden ABTransitIPv4 IPv64,976
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv62,802
AS3356Level 3 Parent, LLCTransitIPv4 IPv62,689
AS17408AboveNet Communications TaiwanUnclassifiedIPv4 IPv61,912
AS3257GTT Communications Inc.TransitIPv4 IPv61,758
AS6939Hurricane Electric LLCTransitIPv4 IPv61,607
AS21859Zenlayer IncHostingIPv4 IPv61,156
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv61,048
AS41095IPTP LTDHostingIPv4 IPv6771

All 50 upstreams →

Transit

Downstream networks

All 23

Networks for which AS63199 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS147281Luckynet9 Private LimitedUnclassifiedIPv42,642
AS136809FAST ZONE ITUnclassifiedIPv4464
AS401650888 Ventures LLCUnclassifiedIPv4358
AS139057Edgenext Legend Dynasty Pte. Ltd.UnclassifiedIPv4 IPv6240
AS150293Capitalonline Data Service (HK) Co., LimitedUnclassifiedIPv4240
AS154701Capitalonline Data Service (HK) Co., LimitedUnclassifiedIPv4182
AS11439VertexCore LLCUnclassifiedIPv4175
AS152726Dream EngineeringUnclassifiedIPv4171
AS151397China TelecomUnclassifiedIPv4120
AS154603V.P.S GYUnclassifiedIPv4118

All 23 downstreams →

Adjacency

Adjacent networks

All 75

Every AS seen directly next to AS63199 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv67,248
AS1299Arelion Sweden ABTransitIPv4 IPv65,572
AS3257GTT Communications Inc.TransitIPv4 IPv63,131
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv62,886
AS3356Level 3 Parent, LLCTransitIPv4 IPv62,822
AS147281Luckynet9 Private LimitedUnclassifiedIPv42,642
AS17408AboveNet Communications TaiwanUnclassifiedIPv4 IPv61,912
AS6939Hurricane Electric LLCTransitIPv4 IPv61,705
AS9002RETN LimitedUnclassifiedIPv41,346
AS21859Zenlayer IncHostingIPv4 IPv61,156

All 75 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-25 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.18M 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.