AS5503: the RMIFL network
Monitore os PCs da sua empresa em tempo real, com dados objetivos.
Testar grátis 14 dias →AS5503 is an internet Autonomous System operated by RMIFL (the United Kingdom). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS5503?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS5503 was assigned to RMIFL by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS5503 currently announces 26 IPv4 block(s), totaling about 99.3 thousand addresses (99,328 in all), registered in the United Kingdom. Services from RMIFL are reached through these addresses.
What it means to see AS5503 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS5503. That means the other end sits on the RMIFL network (the United Kingdom). 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 AS5503?
AS5503 is assigned to RMIFL, registered in the United Kingdom.
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 AS5503 control?
AS5503 currently announces about 99.3 thousand routed IPv4 addresses.