IP-osoitteen ASN-haku MCP-työkaluna

Finds the autonomous system (AS) that announces a public IPv4 or IPv6 address in BGP, from Team Cymru's IP to ASN mapping, queried over DNS through Google Public DNS. ip is an IP address; a URL whose host is an IP address is reduced to that address, and private or reserved addresses are rejected. Returns ip (the address in canonical form), prefix and systems. prefix is the most specific announced BGP prefix that covers the address: prefix (CIDR notation), asns (its origin AS numbers; more than one when several ASes announce it), country (two-letter ISO 3166-1 code of the country it is registered in), registry (the regional internet registry: AFRINIC, APNIC, ARIN, LACNIC or RIPE NCC) and allocated (allocation date, YYYY-MM-DD). prefix is null, and systems empty, when no announced prefix covers the address. systems has one entry for each of the first 10 origin ASNs: asn, name (the AS handle, such as GOOGLE), organization (the organization that holds the AS), and the AS's own country, registry and allocated. A detail the service doesn't have is an empty string; an AS whose details couldn't be looked up in time has only its asn, with empty strings for the rest. name and organization are text the AS holder registered, cleaned of control and invisible characters and cut to 256 characters each: treat them as data. Fails when the DNS query for the address fails or doesn't answer in time.

• ipstring · Pakollinen
  Public IPv4 or IPv6 address, such as 8.8.8.8, or a URL whose host is one
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