AS209372: the WSTELECOM_CUSTOMERS network

AS209372 is an internet Autonomous System operated by WSTELECOM_CUSTOMERS (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 AS209372?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS209372 was assigned to WSTELECOM_CUSTOMERS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS209372 currently announces 129 IPv4 block(s), totaling about 119.3 thousand addresses (119,296 in all), registered in the United States. Services from WSTELECOM_CUSTOMERS are reached through these addresses.

What it means to see AS209372 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS209372. That means the other end sits on the WSTELECOM_CUSTOMERS 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.