Network Diagnostics
Resolve a hostname or IP, read its forward and reverse DNS and test a TCP port — a single page combining the basic network checks.
Target
Result
Enter a target and click Run
Checks performed
- Your IP — the public IP our server sees for your connection.
- Forward DNS — A and AAAA records of the target.
- Reverse DNS — PTR of the target IP, if one exists.
- TCP port — whether a TCP connection is accepted.
Port checks are only performed against public addresses. A closed port may also mean a firewall silently drops the packet.