ASN lookup
ASN lookup: enter an IP address o an AS number such as AS15169 a see the network operator y the prefixes it announces.
Datos comes desde RIPEstat y is requested when you press the button.
Acerca de ASN lookup
ASN lookup: enter an IP address o an AS number such as AS15169 a see the network operator y the prefixes it announces.
Forma parte de la sección «Datos y redes» de SmartCalcy. Se ejecuta en tu navegador sin cuenta, usa tu propia moneda y unidades (cámbialas en la parte superior de la página) y da estimaciones solo a título informativo, así que consulta la guía oficial antes de fiarte de un resultado.
Cómo usar la ASN lookup
Qué calcula y cuándo usarla
Finds the autonomous system number (ASN) de the network that announces an IP address, or the holder y announced address ranges de an AS number you already know. An ASN identifies one network on the internet, such as a provider, a cloud company o a university.
Cómo usarla, paso a paso
- Enter an IP address, o an AS Número such as AS15169.
- Press “Look up ASN”.
- Read the AS Número, holder y whether it es visible en global routing.
- Check the list de announced prefixes undernea.ª.
Qué significa cada dato
- IP address o AS Número – An IPv4 o IPv6 address, o an AS number wi.ª o without the “AS” prefix.
Cómo leer los resultados
- AS Número y holder – The network’s Número y the organisation that holds it.
- Announced – Whether the Red es currently visible en the global routing table.
- Prefixes announced – The count de IPv4 y IPv6 address ranges the network advertises, with a sample de them.
La fórmula
No calculation. Networks use the BGP protocol a announce which address ranges (prefixes) they bote reach, Cada uno under an AS Número. RIPEstat reads these announcements desde routing collectors around the world.
Un ejemplo práctico
Looking up 8.8.8.8 returns AS15169, held by Google LLC, which announces 8.8.8.0/24 among many other ranges.
Supuestos y límites
- Datos comes desde RIPEstat y is requested when you press the button.
- Only the first part de a long prefix list es shown.
- An address that nobody announces cannot be mapped a a Red.
Errores comunes
- Entering an AS Número with a typo o extra text, such as “AS 15169 Google”.
- Assuming one organisation has one ASN. Large companies often operate several.
- Reading the ASN as a location. It identifies a Red, which bote span many countries.
Preguntas frecuentes
What es an ASN?
An autonomous system Número es a unique number given a a network that has its own routing policy on the internet.
What es a prefix?
A Rango de IP addresses written en CIDR form, such as 8.8.8.0/24, that a network announces a the rest de the internet.
Why does an address have no ASN?
The address may be private, unallocated o not currently announced by cualquiera Red.
Is this the same as IP WHOIS?
No. WHOIS shows the registry record. ASN lookup shows which Red actually announces the address en routing.