AS23899: the VNIX-AS-VN Vietnam Internet network information center VNNIC network

AS23899 is an internet Autonomous System operated by VNIX-AS-VN Vietnam Internet network information center VNNIC (Vietnam). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS23899?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS23899 was assigned to VNIX-AS-VN Vietnam Internet network information center VNNIC by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS23899 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Vietnam. Services from VNIX-AS-VN Vietnam Internet network information center VNNIC are reached through these addresses.

What it means to see AS23899 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS23899. That means the other end sits on the VNIX-AS-VN Vietnam Internet network information center VNNIC network (Vietnam). 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.