asn.dev

Observed topology

AS137991 LIFEWAY-AS-AP - Lifeway Singapore Pte. Ltd.

Unclassified APNIC

Upstreams 9 carry this network
Downstreams 2 this network carries
Adjacent (IPv4) 12
Adjacent (IPv6) 8
Upstream graph Who carries AS137991, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS137991 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS137991: 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 IPv6346
AS7473Singapore Telecommunications LtdUnclassifiedIPv4 IPv6253
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv611
AS24482SG.GSHostingIPv4 IPv611
AS37989DCS1 Pte. Ltd.HostingIPv4 IPv611
AS38001NewMedia Express Pte LtdHostingIPv4 IPv611
AS21859Zenlayer IncHostingIPv410
AS23764CTGNetUnclassifiedIPv45
AS61292Blix Group ASUnclassifiedIPv61

Transit

Downstream networks

inferred

Networks for which AS137991 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS4563410 Science Park RoadHostingIPv4 IPv62,280
AS133449VASTSPACE PTE. LTD.UnclassifiedIPv4177

Adjacency

Adjacent networks

All 13

Every AS seen directly next to AS137991 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv62,446
AS4563410 Science Park RoadHostingIPv4 IPv62,280
AS7473Singapore Telecommunications LtdUnclassifiedIPv4 IPv6254
AS21859Zenlayer IncHostingIPv4247
AS133449VASTSPACE PTE. LTD.UnclassifiedIPv4177
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv648
AS24482SG.GSHostingIPv4 IPv648
AS38001NewMedia Express Pte LtdHostingIPv4 IPv648
AS37989DCS1 Pte. Ltd.HostingIPv4 IPv612
AS23764CTGNetUnclassifiedIPv45

All 13 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.46M 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.