geoip_asnum_by_name

(PECL geoip >= 1.1.0)

geoip_asnum_by_name — Get the Autonomous System Numbers (ASN)

geoip_asnum_by_name(string $hostname): string

The geoip_asnum_by_name() function will return the Autonomous System Numbers (ASN) associated with an IP address.

Returns the ASN on success, or false if the address cannot be found in the database.

Example #1 A geoip_asnum_by_name() example

This will output the ASN of the host www.example.com.

<?php
$asn = geoip_asnum_by_name('www.example.com');

if ($asn) {
    echo 'The ASN is: ' . $asn;
}
?>

The above example will output:

The ASN is: AS15133 EdgeCast Networks, Inc

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