AS13979: the ATT-IPFR network
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Testar grátis 14 dias →AS13979 is an internet Autonomous System operated by ATT-IPFR (the United States). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS13979?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS13979 was assigned to ATT-IPFR by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS13979 currently announces 1 IPv4 block(s), totaling 4 addresses (4 in all), registered in the United States. Services from ATT-IPFR are reached through these addresses.
What it means to see AS13979 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS13979. That means the other end sits on the ATT-IPFR network (the United States). 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.
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Perguntas frequentes
Who owns AS13979?
AS13979 is assigned to ATT-IPFR, registered in the United States.
What is an ASN (Autonomous System)?
It is a unique number identifying a network with its own routing policy on the internet. RIRs (regional registries) assign these numbers to carriers, ISPs and companies.
How many IP addresses does AS13979 control?
AS13979 currently announces 4 routed IPv4 addresses.