AS15502: the VODAFONE-IRELAND-ASN network

AS15502 is an internet Autonomous System operated by VODAFONE-IRELAND-ASN (Ireland). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS15502?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS15502 was assigned to VODAFONE-IRELAND-ASN by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS15502 currently announces 32 IPv4 block(s), totaling about 501.8 thousand addresses (501,760 in all), registered in Ireland. Services from VODAFONE-IRELAND-ASN are reached through these addresses.

What it means to see AS15502 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS15502. That means the other end sits on the VODAFONE-IRELAND-ASN network (Ireland). 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.