AS37637: the Smile-Nigeria-AS network

AS37637 is an internet Autonomous System operated by Smile-Nigeria-AS (Nigeria). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS37637?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS37637 was assigned to Smile-Nigeria-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS37637 currently announces 10 IPv4 block(s), totaling about 89.9 thousand addresses (89,856 in all), registered in Nigeria. Services from Smile-Nigeria-AS are reached through these addresses.

What it means to see AS37637 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS37637. That means the other end sits on the Smile-Nigeria-AS network (Nigeria). 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.