AS19863: the Guyana Telephone & Telegraph Co. network

AS19863 is an internet Autonomous System operated by Guyana Telephone & Telegraph Co. (GY). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS19863?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS19863 was assigned to Guyana Telephone & Telegraph Co. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS19863 currently announces 22 IPv4 block(s), totaling about 57.6 thousand addresses (57,600 in all), registered in GY. Services from Guyana Telephone & Telegraph Co. are reached through these addresses.

What it means to see AS19863 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS19863. That means the other end sits on the Guyana Telephone & Telegraph Co. network (GY). 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.