geoip_asnum_by_name

Get the Autonomous System Numbers (ASN)

&reftitle.description; `string` `geoip_asnum_by_name` `string` `hostname`

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

&reftitle.parameters;

`hostname`

- The hostname or IP address.

&reftitle.returnvalues;

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

&reftitle.examples;

### 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;
    }
    ?>

&example.outputs;

    The ASN is: AS15133 EdgeCast Networks, Inc