AS3557: the ISC-AS network
Monitore os PCs da sua empresa em tempo real, com dados objetivos.
Testar grátis 14 dias →AS3557 is an internet Autonomous System operated by ISC-AS (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 AS3557?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS3557 was assigned to ISC-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS3557 currently announces 1 IPv4 block(s), totaling 512 addresses (512 in all), registered in the United States. Services from ISC-AS are reached through these addresses.
What it means to see AS3557 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS3557. That means the other end sits on the ISC-AS 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.
Prefere falar com a gente antes de instalar?
Deixe seus dados e um especialista mostra, no seu contexto, como o PC Monitor ajuda a resolver isso na sua empresa. Sem compromisso.
Perguntas frequentes
Who owns AS3557?
AS3557 is assigned to ISC-AS, 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 AS3557 control?
AS3557 currently announces 512 routed IPv4 addresses.