AS12189: the AS12189 - PhoenixNAP LLC network

AS12189 is an internet Autonomous System operated by AS12189 - PhoenixNAP 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 AS12189?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS12189 was assigned to AS12189 - PhoenixNAP LLC by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS12189 currently announces 14 IPv4 block(s), totaling about 7.7 thousand addresses (7,680 in all), registered in the United States. Services from AS12189 - PhoenixNAP LLC are reached through these addresses.

What it means to see AS12189 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS12189. That means the other end sits on the AS12189 - PhoenixNAP 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.