AS399478: the SJCCU-HQ network
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Testar grátis 14 dias →AS399478 is an internet Autonomous System operated by SJCCU-HQ (AG). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS399478?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS399478 was assigned to SJCCU-HQ by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS399478 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in AG. Services from SJCCU-HQ are reached through these addresses.
What it means to see AS399478 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS399478. That means the other end sits on the SJCCU-HQ network (AG). 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 AS399478?
AS399478 is assigned to SJCCU-HQ, registered in AG.
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 AS399478 control?
AS399478 currently announces 256 routed IPv4 addresses.