IP to Hostname Converter

Reverse DNS lookup to find the hostname associated with an IP address.

Drop your file here

What is IP to Hostname (Reverse DNS)?

IP to Hostname conversion, also known as Reverse DNS (rDNS) lookup, is the process of determining the domain name or hostname associated with an IP address. While forward DNS maps domains to IPs, reverse DNS does the exact opposite.

Tool Highlights

  • Supports IPv4 and IPv6 lookup
  • Batch processing for multiple IPs
  • Real-time results as you type
  • File upload and export features
  • Secure and private processing

Common Uses

  • Email server verification (SPF/PTR)
  • Security auditing and log analysis
  • Identifying web visitors or bots
  • Network diagnostics and mapping

How to use IP to Hostname?

  1. Enter IPs: Paste your list of IP addresses into the input box.
  2. Drag & Drop: You can also drop a text file directly into the input area.
  3. Convert: The tool will automatically start looking up hostnames if 'Auto-convert' is on.
  4. Copy & Export: Copy individual hostnames or download the entire list in JSON, CSV, or TXT format.