asn.dev

Observed topology

AS6660 CWASIA

Unclassified RIPE

Upstreams 13 carry this network
Downstreams 10 this network carries
Adjacent (IPv4) 24
Adjacent (IPv6) 7
Upstream graph Who carries AS6660, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS6660 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 13

Networks observed carrying traffic for AS6660: 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
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv6135
AS1273IDDQD-ASBusinessIPv4 IPv6125
AS7473Singapore Telecommunications LtdUnclassifiedIPv4 IPv665
AS6939Hurricane Electric LLCTransitIPv444
AS3491PCCW Global (HK) Ltd.TransitIPv417
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv68
AS24482SG.GSHostingIPv4 IPv68
AS38001NewMedia Express Pte LtdHostingIPv4 IPv68
AS64073Vetta GroupUnclassifiedIPv4 IPv68
AS24115EquinixHostingIPv47

All 13 upstreams →

Transit

Downstream networks

inferred

Networks for which AS6660 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS139661Toll Transport Pty Ltd.UnclassifiedIPv4638
AS9502Hong Kong HeadquartersUnclassifiedIPv4315
AS72Schlumberger LimitedUnclassifiedIPv4183
AS16477Nielsen Consumer LLCUnclassifiedIPv487
AS202917Cigna HLA Technology Services Company LtdUnclassifiedIPv463
AS64086Australia and New Zealand Banking Group Limited (ANZ)UnclassifiedIPv458
AS35967Citigroup Inc.UnclassifiedIPv421
AS30437General Electric CompanyUnclassifiedIPv416
AS153595Citigroup Inc.UnclassifiedIPv414
AS53766Arista Networks, Inc.UnclassifiedIPv44

Adjacency

Adjacent networks

All 24

Every AS seen directly next to AS6660 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS139661Toll Transport Pty Ltd.UnclassifiedIPv4638
AS1273IDDQD-ASBusinessIPv4 IPv6575
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv6439
AS9502Hong Kong HeadquartersUnclassifiedIPv4315
AS72Schlumberger LimitedUnclassifiedIPv4183
AS7473Singapore Telecommunications LtdUnclassifiedIPv4 IPv6160
AS6939Hurricane Electric LLCTransitIPv4143
AS3491PCCW Global (HK) Ltd.TransitIPv4107
AS16477Nielsen Consumer LLCUnclassifiedIPv487
AS4635Hong Kong Internet Exchange--Route Server 1UnclassifiedIPv471

All 24 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-15 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.09M 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.