asn.dev

Observed topology

AS3491 PCCWG-APAC-HK - PCCW Global (HK) Ltd.

Transit APNIC

Upstreams 29 carry this network
Downstreams 631 this network carries
Adjacent (IPv4) 670
Adjacent (IPv6) 307
Upstream graph Who carries AS3491, and who carries them, drawn as a map up to the transit-free core. 15 exchanges Where AS3491 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 29

Networks observed carrying traffic for AS3491: 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 IPv64,365
AS1299Arelion Sweden ABTransitIPv4 IPv63,499
AS3356Level 3 Parent, LLCTransitIPv4 IPv63,109
AS2914NTT America, Inc.TransitIPv4 IPv62,838
AS174Cogent Communications, LLCTransitIPv4 IPv62,817
AS9002RETN LimitedUnclassifiedIPv4 IPv61,518
AS577Bell CanadaMobileIPv4 IPv61,048
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv61,010
AS3257GTT Communications Inc.TransitIPv4 IPv6942
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6575

All 29 upstreams →

Transit

Downstream networks

All 631

Networks for which AS3491 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS7552Viettel GroupMobileIPv4 IPv645,259
AS4760HKT LimitedResidentialIPv4 IPv635,022
AS152194CTG Server LimitedUnclassifiedIPv430,087
AS9924Taiwan Fixed Network, Telco and Network Service Provider.ResidentialIPv4 IPv626,387
AS36992ETISALAT MISRMobileIPv4 IPv620,497
AS4780Digital United Inc.ResidentialIPv418,759
AS4515PCCW IMS Ltd (PCCW Business Internet Access)UnclassifiedIPv4 IPv616,249
AS45899VNPT CorpMobileIPv415,513
AS399077TcloudnetHostingIPv4 IPv613,767
AS20473The Constant Company, LLCHostingIPv4 IPv613,705

All 631 downstreams →

Adjacency

Adjacent networks

All 670

Every AS seen directly next to AS3491 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS38001NewMedia Express Pte LtdHostingIPv4 IPv6459,201
AS3356Level 3 Parent, LLCTransitIPv4 IPv6180,502
AS577Bell CanadaMobileIPv4 IPv6148,906
AS174Cogent Communications, LLCTransitIPv4 IPv6140,658
AS1299Arelion Sweden ABTransitIPv4 IPv6126,660
AS852TELUS Communications Inc.ResidentialIPv4 IPv6120,706
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6114,652
AS6939Hurricane Electric LLCTransitIPv4 IPv6109,889
AS3257GTT Communications Inc.TransitIPv4 IPv6102,968
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv6102,622

All 670 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.