Your IP : 3.21.159.223 {51748831}
Reverse DNS : ec2-3-21-159-223.us-east-2.compute.amazonaws.com

Result = Array
(
    [0] => Array
        (
            [host] => ec2-3-21-159-223.us-east-2.compute.amazonaws.com
            [class] => IN
            [ttl] => 604800
            [type] => A
            [ip] => 3.21.159.223
        )

)
Auth NS = 
Additional =