AS25403: the DELTA-AS network
Monitore os PCs da sua empresa em tempo real, com dados objetivos.
Testar grátis 14 dias →AS25403 is an internet Autonomous System operated by DELTA-AS (Ukraine). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS25403?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS25403 was assigned to DELTA-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS25403 currently announces 1 IPv4 block(s), totaling 512 addresses (512 in all), registered in Ukraine. Services from DELTA-AS are reached through these addresses.
What it means to see AS25403 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS25403. That means the other end sits on the DELTA-AS network (Ukraine). 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 AS25403?
AS25403 is assigned to DELTA-AS, registered in Ukraine.
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 AS25403 control?
AS25403 currently announces 512 routed IPv4 addresses.