asn.dev

Observed topology

AS37989 DCS1PTELTD-AS-AP DCS1 Pte. Ltd.

Hosting APNIC

Upstreams 8 carry this network
Downstreams 372 this network carries
Adjacent (IPv4) 271
Adjacent (IPv6) 337
Upstream graph Who carries AS37989, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS37989 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS37989: 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
AS56300MyRepublic Ltd.UnclassifiedIPv489
AS6939Hurricane Electric LLCTransitIPv4 IPv651
AS24482SG.GSHostingIPv4 IPv62
AS4913410VPN Research Network LTDUnclassifiedIPv42
AS212508Lowhosting services of Davide GennariUnclassifiedIPv42
AS38001NewMedia Express Pte LtdHostingIPv41
AS58057Securebit AGUnclassifiedIPv61
AS61292Blix Group ASUnclassifiedIPv61

Transit

Downstream networks

All 372

Networks for which AS37989 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS18403FPT Telecom CompanyResidentialIPv44,704
AS7713PT Telekomunikasi IndonesiaResidentialIPv4 IPv63,682
AS45899VNPT CorpMobileIPv4 IPv63,383
AS137409GSL Networks Pty LTDUnclassifiedIPv4 IPv61,497
AS15169Google LLCHostingIPv4 IPv61,090
AS9318SK Broadband Co LtdUnclassifiedIPv4 IPv6803
AS4800PT Aplikanusa LintasartaHostingIPv4 IPv6690
AS17451BIZNET NETWORKSResidentialIPv4 IPv6628
AS4628Pacific Internet Pte LtdUnclassifiedIPv4412
AS152194CTG Server LimitedUnclassifiedIPv4396

All 372 downstreams →

Adjacency

Adjacent networks

All 337

Every AS seen directly next to AS37989 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS56300MyRepublic Ltd.UnclassifiedIPv4 IPv6829,775
AS6939Hurricane Electric LLCTransitIPv4 IPv6372,715
AS64049Reliance Jio Infocomm Pte Ltd SingaporeUnclassifiedIPv4 IPv614,539
AS137409GSL Networks Pty LTDUnclassifiedIPv4 IPv611,014
AS9318SK Broadband Co LtdUnclassifiedIPv4 IPv66,956
AS32787Akamai Technologies, Inc.HostingIPv4 IPv66,421
AS18403FPT Telecom CompanyResidentialIPv45,849
AS7713PT Telekomunikasi IndonesiaResidentialIPv4 IPv65,655
AS15169Google LLCHostingIPv4 IPv65,359
AS23764CTGNetUnclassifiedIPv4 IPv64,696

All 337 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-25 12:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M 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.