AS9929: the CUII CHINA UNICOM Industrial Internet Backbone network

AS9929 is an internet Autonomous System operated by CUII CHINA UNICOM Industrial Internet Backbone (China). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS9929?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9929 was assigned to CUII CHINA UNICOM Industrial Internet Backbone by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9929 currently announces 165 IPv4 block(s), totaling about 651.3 thousand addresses (651,264 in all), registered in China. Services from CUII CHINA UNICOM Industrial Internet Backbone are reached through these addresses.

What it means to see AS9929 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9929. That means the other end sits on the CUII CHINA UNICOM Industrial Internet Backbone 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.