AS133377: the IBM-GPS-AS-AP IBM Business Services, Inc network

AS133377 is an internet Autonomous System operated by IBM-GPS-AS-AP IBM Business Services, Inc (the Philippines). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS133377?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS133377 was assigned to IBM-GPS-AS-AP IBM Business Services, Inc by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS133377 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in the Philippines. Services from IBM-GPS-AS-AP IBM Business Services, Inc are reached through these addresses.

What it means to see AS133377 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS133377. That means the other end sits on the IBM-GPS-AS-AP IBM Business Services, Inc network (the Philippines). 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.