subnet.im

AS278Universidad Nacional Autonoma de Mexico

MexicoRegistryLACNICTypeEyeball

As of 23rd October 2026, AS278 (Universidad Nacional Autonoma de Mexico), an access network registered in Mexico with LACNIC, originates 164 IPv4 prefixes covering 238k addresses and 104 IPv6 prefixes. By IPv4 address space that makes it the 1,163rd-largest of the 79,663 networks we see originating IPv4, and the 10th-largest of 495 in Mexico. It is seen behind 6 upstream networks, most often AS18734 (Operbes, S.A. de C.V.) and AS8151 (Telmex (Uninet)). 95% of its announcements have a valid RPKI ROA; 13 are RPKI-invalid. 94% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

164

IPv6 prefixes

104

IPv4 addresses

238k

IPv6 /64s

4.3B

Upstream graph

The networks AS278 is seen behind, one and two hops out, drawn from real AS paths.

AS278Toward the internet core
Upstream graph for AS278: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS278Universidad Nacio…This networkAS8151Telmex (Uninet)AS11172Alestra, S. de R.…AS17072TOTAL PLAY TELECO…AS18734Operbes, S.A. de …AS22884TOTAL PLAY TELECO…AS2914NTT America, Inc.AS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS265589Gobierno del Esta…

Networks observed one and two hops upstream of AS278 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

12

adjacent networks

Upstreams
650%
Peers
650%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS278
NetworkCountryRelationshipPathsVantage pts
AS18734Operbes, S.A. de C.V.MXPeer7,762141
AS8151Telmex (Uninet)MXPeer5,027140
AS17072TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.MXPeer4,701141
AS11172Alestra, S. de R.L. de C.V.MXPeer66277
AS22884TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.MXPeer966
AS18592Corporacion Universitaria para el Desarrollo de Internet, A.C.MXPeer161

Prefixes

All 268

The largest blocks AS278 originates, widest first.

Largest prefixes originated by AS278
PrefixAddressesVisibility
132.247.0.0/1665.5k77/77
132.248.0.0/1665.5k77/77
132.248.0.0/1732.8k77/77
132.248.128.0/1732.8k77/77
132.247.2.0/2425677/77
132.247.12.0/2425677/77
132.247.13.0/2425677/77
132.247.17.0/2425677/77
132.247.18.0/2425677/77
132.247.19.0/2425677/77

Routing health

How AS278's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid95.1%255
  • Invalid4.9%13
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more93.7%251
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%6.3%17

Prefix sizes

IPv4 — 164 prefixes

IPv6 — 104 prefixes

  • /324.3B × /641.0%1
  • /4865.5k × /6499.0%103

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

42 announced and 36 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.