AS402238: the VTT - Van Oss Telegraph and Telephone LLC network

AS402238 is an internet Autonomous System operated by VTT - Van Oss Telegraph and Telephone LLC (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 AS402238?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS402238 was assigned to VTT - Van Oss Telegraph and Telephone LLC by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS402238 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in the United States. Services from VTT - Van Oss Telegraph and Telephone LLC are reached through these addresses.

What it means to see AS402238 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS402238. That means the other end sits on the VTT - Van Oss Telegraph and Telephone LLC 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.