asn.dev

Observed topology

AS21497 UMC-AS

Mobile RIPE NSP

Upstreams 40 carry this network
Downstreams 96 this network carries
Adjacent (IPv4) 134
Adjacent (IPv6) 32
Upstream graph Who carries AS21497, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS21497 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 40

Networks observed carrying traffic for AS21497: 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
AS2914NTT America, Inc.TransitIPv4 IPv61,753
AS6939Hurricane Electric LLCTransitIPv4 IPv61,321
AS1273IDDQD-ASBusinessIPv4 IPv6968
AS3257GTT Communications Inc.TransitIPv4 IPv6575
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6371
AS6461Zayo BandwidthTransitIPv4272
AS3303Swisscom (Schweiz) AGResidentialIPv4167
AS24482SG.GSHostingIPv4 IPv6152
AS34927iFog GmbHHostingIPv4146
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv6128

All 40 upstreams →

Transit

Downstream networks

All 96

Networks for which AS21497 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS31148PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"ResidentialIPv414,950
AS6703PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"ResidentialIPv43,953
AS47359"Tvoi Net" Ltd.UnclassifiedIPv4895
AS34143PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"UnclassifiedIPv4472
AS12883PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"UnclassifiedIPv4 IPv6387
AS16044IPORT UNITED LLCResidentialIPv4383
AS34605Linet, LTDUnclassifiedIPv4380
AS205722Binotel LLCUnclassifiedIPv4354
AS29491KIEVLINE LLCUnclassifiedIPv4 IPv6241
AS43309GIPERNET LLCResidentialIPv4 IPv6147

All 96 downstreams →

Adjacency

Adjacent networks

All 138

Every AS seen directly next to AS21497 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS31148PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"ResidentialIPv415,231
AS2914NTT America, Inc.TransitIPv4 IPv612,026
AS1273IDDQD-ASBusinessIPv4 IPv65,954
AS3257GTT Communications Inc.TransitIPv4 IPv64,008
AS6703PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"ResidentialIPv43,953
AS12883PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST"UnclassifiedIPv4 IPv63,740
AS6939Hurricane Electric LLCTransitIPv4 IPv62,470
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv62,333
AS29491KIEVLINE LLCUnclassifiedIPv4 IPv61,306
AS47359"Tvoi Net" Ltd.UnclassifiedIPv4985

All 138 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-28 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.