AS11172: the Alestra, S. de R.L. de C.V. network

AS11172 is an internet Autonomous System operated by Alestra, S. de R.L. de C.V. (Mexico). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS11172?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS11172 was assigned to Alestra, S. de R.L. de C.V. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS11172 currently announces 227 IPv4 block(s), totaling about 597.5 thousand addresses (597,504 in all), registered in Mexico. Services from Alestra, S. de R.L. de C.V. are reached through these addresses.

What it means to see AS11172 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS11172. That means the other end sits on the Alestra, S. de R.L. de C.V. 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.