AS27993: the Universidad Nacional del Litoral network

AS27993 is an internet Autonomous System operated by Universidad Nacional del Litoral (Argentina). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS27993?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS27993 was assigned to Universidad Nacional del Litoral by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS27993 currently announces 1 IPv4 block(s), totaling about 4.1 thousand addresses (4,096 in all), registered in Argentina. Services from Universidad Nacional del Litoral are reached through these addresses.

What it means to see AS27993 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS27993. That means the other end sits on the Universidad Nacional del Litoral network (Argentina). 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.