Pencarian ASN / Prefix

Peta IP ke ASN/origin dan lihat prefix yang diumumkan.

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Temukan prefix

Lookup IP mengembalikan origin prefix, negara, dan nama ASN jika tersedia.

Lookup ASN

Tanya nomor AS langsung (AS13335) untuk mengambil nama organisasi cepat.

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Use ASN lookup to understand which network an IP address belongs to. Instead of focusing on a single IP, ASN/prefix information tells you who announces the range on the internet (ISP, data center, cloud provider, or VPN).

This is useful for security and operations: allowlisting corporate networks, investigating suspicious traffic, or explaining why access differs between regions. ASN data also helps confirm whether traffic comes from a consumer ISP or a hosting provider.

Keep in mind that IP ownership and routing can change. Treat the results as a diagnostic signal and verify with authoritative sources if you’re making critical policy decisions.

FAQ

›What is an ASN?

An Autonomous System Number identifies a network on the internet that announces IP prefixes via BGP.

›What is a prefix?

A prefix is an IP range (CIDR) like 203.0.113.0/24. It represents a block of addresses announced together.

›Is ASN the same as ISP?

Often, but not always. A data center, cloud provider, or VPN can also have an ASN.

›Can I use ASN for allowlisting?

Some systems support ASN-based policies; otherwise, you typically allowlist specific prefixes or IPs.

›Does ASN show the exact location?

No. ASN is about network ownership/routing, not precise geolocation.

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