AS138164: the MUST-AS-AP Macau University of Science and Technology network

AS138164 is an internet Autonomous System operated by MUST-AS-AP Macau University of Science and Technology (MO). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS138164?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS138164 was assigned to MUST-AS-AP Macau University of Science and Technology by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS138164 currently announces 2 IPv4 block(s), totaling about 1.5 thousand addresses (1,536 in all), registered in MO. Services from MUST-AS-AP Macau University of Science and Technology are reached through these addresses.

What it means to see AS138164 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS138164. That means the other end sits on the MUST-AS-AP Macau University of Science and Technology network (MO). 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.