asn.dev

Observed topology

AS4657 STARHUB-INTERNET StarHub Ltd

Residential ARIN

Upstreams 42 carry this network
Downstreams 798 this network carries
Adjacent (IPv4) 890
Adjacent (IPv6) 52
Upstream graph Who carries AS4657, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS4657 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 42

Networks observed carrying traffic for AS4657: 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
AS1299Arelion Sweden ABTransitIPv4 IPv61,963
AS6939Hurricane Electric LLCTransitIPv4 IPv61,796
AS9002RETN LimitedUnclassifiedIPv4 IPv61,187
AS2914NTT America, Inc.TransitIPv4869
AS174Cogent Communications, LLCTransitIPv4 IPv6848
AS34549meerfarbig GmbH & Co. KGHostingIPv4804
AS4637Telstra GlobalUnclassifiedIPv4780
AS50304Blix Solutions ASUnclassifiedIPv4402
AS23764CTGNetUnclassifiedIPv4271
AS38001NewMedia Express Pte LtdHostingIPv4 IPv6222

All 42 upstreams →

Transit

Downstream networks

All 798

Networks for which AS4657 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS55430Starhub LtdResidentialIPv4 IPv612,483
AS138345StarHub LtdUnclassifiedIPv4 IPv64,348
AS174Cogent Communications, LLCTransitIPv42,305
AS58621Vodien Internet Solutions Pte LtdHostingIPv4 IPv61,602
AS4628Pacific Internet Pte LtdUnclassifiedIPv4 IPv61,286
AS4780Digital United Inc.ResidentialIPv41,059
AS38719Dreamscape Networks LimitedHostingIPv4 IPv61,007
AS3758SingNetResidentialIPv4961
AS2914NTT America, Inc.TransitIPv4799
AS4058CITIC Telecom International CPC LimitedUnclassifiedIPv4783

All 798 downstreams →

Adjacency

Adjacent networks

All 890

Every AS seen directly next to AS4657 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS132132MyRepublic Ltd.ResidentialIPv4 IPv6726,369
AS9002RETN LimitedUnclassifiedIPv4 IPv6164,438
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4147,897
AS174Cogent Communications, LLCTransitIPv4 IPv672,676
AS1299Arelion Sweden ABTransitIPv4 IPv663,748
AS2914NTT America, Inc.TransitIPv4 IPv657,875
AS6461Zayo BandwidthTransitIPv452,365
AS4637Telstra GlobalUnclassifiedIPv4 IPv646,663
AS58453China Mobile International LimitedUnclassifiedIPv430,663
AS55430Starhub LtdResidentialIPv4 IPv612,483

All 890 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.