asn.dev

Observed topology

AS37721 Virtual Technologies & Solutions - Virtual Technologies & Solutions

Residential AFRINIC Cable/DSL/ISP

Upstreams 16 carry this network
Downstreams 4,761 this network carries
Adjacent (IPv4) 4,624
Adjacent (IPv6) 2,497
Upstream graph Who carries AS37721, and who carries them, drawn as a map up to the transit-free core. 27 exchanges Where AS37721 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 16

Networks observed carrying traffic for AS37721: 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 IPv64,930
AS6461Zayo BandwidthTransitIPv4 IPv6585
AS1299Arelion Sweden ABTransitIPv4 IPv6305
AS174Cogent Communications, LLCTransitIPv4 IPv6280
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv6217
AS3356Level 3 Parent, LLCTransitIPv4 IPv6204
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6146
AS2914NTT America, Inc.TransitIPv4 IPv6128
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4118
AS13030Init7 (Switzerland) Ltd.HostingIPv694

All 16 upstreams →

Transit

Downstream networks

All 4,761

Networks for which AS37721 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS37577Orange Burkina FasoUnclassifiedIPv426,837
AS16509Amazon.com, Inc.HostingIPv4 IPv69,849
AS12479Orange Espagne SAResidentialIPv4 IPv68,172
AS7552Viettel GroupMobileIPv4 IPv68,124
AS9498BHARTI Airtel Ltd.MobileIPv45,047
AS174Cogent Communications, LLCTransitIPv4 IPv64,069
AS9009M247 Europe SRLHostingIPv4 IPv63,707
AS13335Cloudflare, Inc.HostingIPv4 IPv63,153
AS25543ONATEL (Office National des Telecommunications, PTT)UnclassifiedIPv42,377
AS47583Hostinger International LimitedHostingIPv41,860

All 4,761 downstreams →

Adjacency

Adjacent networks

All 4,624

Every AS seen directly next to AS37721 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv6192,051
AS3356Level 3 Parent, LLCTransitIPv4 IPv686,573
AS5511Orange S.A.TransitIPv4 IPv683,716
AS174Cogent Communications, LLCTransitIPv4 IPv666,968
AS1273IDDQD-ASBusinessIPv4 IPv652,734
AS6461Zayo BandwidthTransitIPv4 IPv651,351
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv650,182
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv637,442
AS3257GTT Communications Inc.TransitIPv4 IPv633,704
AS1299Arelion Sweden ABTransitIPv4 IPv628,432

All 4,624 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-03 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.45M 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.