asn.dev

Observed topology

AS9924 TFN-TW - Taiwan Fixed Network, Telco and Network Service Provider.

Residential APNIC

Upstreams 18 carry this network
Downstreams 46 this network carries
Adjacent (IPv4) 68
Adjacent (IPv6) 27
Upstream graph Who carries AS9924, and who carries them, drawn as a map up to the transit-free core. 8 exchanges Where AS9924 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 18

Networks observed carrying traffic for AS9924: 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
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv626,309
AS6939Hurricane Electric LLCTransitIPv4 IPv62,025
AS9505Taiwan Internet GatewayUnclassifiedIPv41,248
AS4637Telstra GlobalUnclassifiedIPv4849
AS9002RETN LimitedUnclassifiedIPv4 IPv6670
AS2914NTT America, Inc.TransitIPv4591
AS9304HGC Global Communications LimitedHostingIPv4 IPv6357
AS24482SG.GSHostingIPv4 IPv6222
AS58453China Mobile International LimitedUnclassifiedIPv4 IPv6131
AS7473Singapore Telecommunications LtdUnclassifiedIPv4125

All 18 upstreams →

Transit

Downstream networks

All 46

Networks for which AS9924 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS24158Taiwan Mobile Co., Ltd.UnclassifiedIPv4 IPv647,596
AS38841kbro CO. Ltd.UnclassifiedIPv4 IPv623,386
AS24164UNION BROADBAND NETWORKUnclassifiedIPv4 IPv613,857
AS131611San Da Cable TV Co., Ltd.UnclassifiedIPv45,336
AS24163UNION BROADBAND NETWORKUnclassifiedIPv4 IPv63,506
AS24165UNION BROADBAND NETWORKUnclassifiedIPv4 IPv63,215
AS131602Hsin Yeong An Cable TV Co., Ltd.UnclassifiedIPv42,625
AS18429Extra-Lan Technologies Co., LTDUnclassifiedIPv4 IPv62,582
AS131628Tai-Fu Cloud Co., Ltd.UnclassifiedIPv41,000
AS18415B-WIZ TechnologyUnclassifiedIPv4995

All 46 downstreams →

Adjacency

Adjacent networks

All 71

Every AS seen directly next to AS9924 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv677,135
AS24158Taiwan Mobile Co., Ltd.UnclassifiedIPv4 IPv647,596
AS38841kbro CO. Ltd.UnclassifiedIPv4 IPv623,626
AS6939Hurricane Electric LLCTransitIPv4 IPv620,179
AS24164UNION BROADBAND NETWORKUnclassifiedIPv4 IPv613,857
AS9002RETN LimitedUnclassifiedIPv4 IPv613,491
AS2914NTT America, Inc.TransitIPv4 IPv610,157
AS131611San Da Cable TV Co., Ltd.UnclassifiedIPv45,336
AS9505Taiwan Internet GatewayUnclassifiedIPv4 IPv64,877
AS174Cogent Communications, LLCTransitIPv44,492

All 71 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M 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.