asn.dev

Observed topology

AS37133 Airtel Tanzania - Airtel Tanzania

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 11 this network carries
Adjacent (IPv4) 16
Adjacent (IPv6) 4
Upstream graph Who carries AS37133, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS37133 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS37133: 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
AS327708Airtel Rwanda LtdUnclassifiedIPv4 IPv64,574
AS37440Airtel Malawi LtdUnclassifiedIPv423

Transit

Downstream networks

All 11

Networks for which AS37133 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS37182Tanzania Education And Research NetworkUnclassifiedIPv41,949
AS327795e-Government AuthorityUnclassifiedIPv4355
AS37349Aptus Solutions LtdResidentialIPv4 IPv6171
AS327859Capital TechnologiesUnclassifiedIPv4143
AS328700Tanzania Internet Service Providers Association - TISPA - Tanzania Internet Service Providers AssociationHostingIPv4 IPv695
AS63293Facebook, Inc.HostingIPv4 IPv692
AS36909Habari Node Public LimitedResidentialIPv472
AS14789Cloudflare, Inc.UnclassifiedIPv464
AS37013Satcom Networks AfricaUnclassifiedIPv459
AS22354-UnclassifiedIPv457

All 11 downstreams →

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS37133 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS327708Airtel Rwanda LtdUnclassifiedIPv4 IPv68,887
AS37182Tanzania Education And Research NetworkUnclassifiedIPv41,954
AS327795e-Government AuthorityUnclassifiedIPv4744
AS37349Aptus Solutions LtdResidentialIPv4 IPv6578
AS328436Flashnet Technologies LimitedResidentialIPv4304
AS30844Liquid Telecommunications LtdUnclassifiedIPv4155
AS327859Capital TechnologiesUnclassifiedIPv4143
AS328700Tanzania Internet Service Providers Association - TISPA - Tanzania Internet Service Providers AssociationHostingIPv4 IPv695
AS63293Facebook, Inc.HostingIPv4 IPv692
AS37440Airtel Malawi LtdUnclassifiedIPv478

All 16 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.