Observed topology

AS37661 Nigerian Research and Education Network Limited by Guarantee - Nigerian Research and Education Network Limited by Guarantee

Hosting AFRINIC

Upstreams 5 carry this network

Downstreams 4 this network carries

Adjacent (IPv4) 9

Adjacent (IPv6) 0

Upstream graph Who carries AS37661, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS37661 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS37661: 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.

AS	Network	Type	Families	Paths seen
AS37613	DOLPHIN TELECOMMUNICATION LIMITED	Unclassified	IPv4	382
AS37288	West and Central African Research Network	Education	IPv4	335
AS29465	MTN NIGERIA Communication limited	Mobile	IPv4	53
AS37721	Virtual Technologies & Solutions	Residential	IPv4	11
AS36932	Internet Exchange Point of Nigeria	Unclassified	IPv4	5

Transit

Downstream networks

inferred

Networks for which AS37661 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS37404	University of Ibadan	Unclassified	IPv4	68
AS37297	Obafemi Awolowo University, Ife	Unclassified	IPv4	66
AS37420	University of JOS	Education	IPv4	20
AS37686	Ahmadu Bello University Zaria Nigeria	Unclassified	IPv4	10

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS37661 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS37613	DOLPHIN TELECOMMUNICATION LIMITED	Unclassified	IPv4	466
AS37288	West and Central African Research Network	Education	IPv4	368
AS29465	MTN NIGERIA Communication limited	Mobile	IPv4	98
AS37404	University of Ibadan	Unclassified	IPv4	68
AS37297	Obafemi Awolowo University, Ife	Unclassified	IPv4	66
AS37420	University of JOS	Education	IPv4	20
AS37721	Virtual Technologies & Solutions	Residential	IPv4	13
AS37686	Ahmadu Bello University Zaria Nigeria	Unclassified	IPv4	10
AS36932	Internet Exchange Point of Nigeria	Unclassified	IPv4	5

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.