AS3758: the SINGNET SingNet network

AS3758 is an internet Autonomous System operated by SINGNET SingNet (Singapore). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS3758?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS3758 was assigned to SINGNET SingNet by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS3758 currently announces 291 IPv4 block(s), totaling about 698.9 thousand addresses (698,880 in all), registered in Singapore. Services from SINGNET SingNet are reached through these addresses.

What it means to see AS3758 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS3758. That means the other end sits on the SINGNET SingNet network (Singapore). 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.