AS6167: the CELLCO-PART network

AS6167 is an internet Autonomous System operated by CELLCO-PART (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 AS6167?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS6167 was assigned to CELLCO-PART by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS6167 currently announces 232 IPv4 block(s), totaling about 18 million addresses (17,960,448 in all), registered in the United States. Services from CELLCO-PART are reached through these addresses.

What it means to see AS6167 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS6167. That means the other end sits on the CELLCO-PART 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.