AS9394: the CTTNET China TieTong Telecommunications Corporation network

AS9394 is an internet Autonomous System operated by CTTNET China TieTong Telecommunications Corporation (China). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS9394?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9394 was assigned to CTTNET China TieTong Telecommunications Corporation by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9394 currently announces 35 IPv4 block(s), totaling about 2.7 million addresses (2,663,168 in all), registered in China. Services from CTTNET China TieTong Telecommunications Corporation are reached through these addresses.

What it means to see AS9394 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9394. That means the other end sits on the CTTNET China TieTong Telecommunications Corporation network (China). 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.