PTR Record Lookup

PTR (Pointer) records provide reverse DNS lookup functionality, mapping IP addresses back to hostnames. They're essential for email delivery, security verification, and network troubleshooting.

How PTR Records Work:

1. IP address is reversed and appended with .in-addr.arpa (IPv4) or .ip6.arpa (IPv6)
2. DNS query is made for the reversed address
3. PTR record returns the associated hostname
4. This confirms the relationship between IP and hostname

Common Uses:

• Email Delivery: Mail servers verify sender identity
• Security: Identify suspicious or malicious IPs
• Logging: Convert IP addresses to readable hostnames
• Network Troubleshooting: Identify network devices and servers

Example: