AS21479: the ROSTOV-TELEGRAF-AS PJSC Rostelecom. Rostov-na-Dony branch network

AS21479 is an internet Autonomous System operated by ROSTOV-TELEGRAF-AS PJSC Rostelecom. Rostov-na-Dony branch (Russia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS21479?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS21479 was assigned to ROSTOV-TELEGRAF-AS PJSC Rostelecom. Rostov-na-Dony branch by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS21479 currently announces 9 IPv4 block(s), totaling about 34.6 thousand addresses (34,560 in all), registered in Russia. Services from ROSTOV-TELEGRAF-AS PJSC Rostelecom. Rostov-na-Dony branch are reached through these addresses.

What it means to see AS21479 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS21479. That means the other end sits on the ROSTOV-TELEGRAF-AS PJSC Rostelecom. Rostov-na-Dony branch network (Russia). 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

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