AS1757: the LEXIS-AS network

AS1757 is an internet Autonomous System operated by LEXIS-AS (the United States). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS1757?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS1757 was assigned to LEXIS-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS1757 currently announces 12 IPv4 block(s), totaling about 4.9 thousand addresses (4,864 in all), registered in the United States. Services from LEXIS-AS are reached through these addresses.

What it means to see AS1757 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS1757. That means the other end sits on the LEXIS-AS network (the United States). 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.