Network Tools
Ping, A Record lookup, HTTP test and Port status
Ping Test
Check host reachability
A Record
Query A/AAAA records
PTR Lookup
Reverse DNS & IP owner
HTTP Test
Check HTTP status and headers
Port Check
Check TCP/UDP port status
Enter an IP address.
Frequently Asked Questions
What is a PTR lookup?
It is the opposite of an A record: from an IP address it finds the matching domain name. It is also called "reverse DNS".
Why is PTR important for a mail server?
Many receiving servers treat email from a server without a valid, matching PTR as suspicious or spam.