AS28391: the Universidad Juarez Autonoma de Tabasco network

AS28391 is an internet Autonomous System operated by Universidad Juarez Autonoma de Tabasco (Mexico). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS28391?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS28391 was assigned to Universidad Juarez Autonoma de Tabasco by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS28391 currently announces 33 IPv4 block(s), totaling about 41.2 thousand addresses (41,216 in all), registered in Mexico. Services from Universidad Juarez Autonoma de Tabasco are reached through these addresses.

What it means to see AS28391 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS28391. That means the other end sits on the Universidad Juarez Autonoma de Tabasco network (Mexico). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.