AS140637: the MTG-MG Macquarie Technology Operations Pty Limited network

AS140637 is an internet Autonomous System operated by MTG-MG Macquarie Technology Operations Pty Limited (Australia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS140637?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS140637 was assigned to MTG-MG Macquarie Technology Operations Pty Limited by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS140637 currently announces 21 IPv4 block(s), totaling about 206.1 thousand addresses (206,080 in all), registered in Australia. Services from MTG-MG Macquarie Technology Operations Pty Limited are reached through these addresses.

What it means to see AS140637 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS140637. That means the other end sits on the MTG-MG Macquarie Technology Operations Pty Limited network (Australia). 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.