DNSBuddy
Bulk FCrDNS Lookup Tool

Verify Forward Confirmed Reverse DNS for multiple IPs

Enter up to 256 IP addresses (one per line) to verify FCrDNS. This tool checks if reverse DNS (PTR) records match forward DNS (A/AAAA) records.

Bulk FCrDNS Lookup
Enter IP addresses (one per line, max 256) and select a DNS provider

Enter one IP address per line (IPv4 or IPv6). Maximum 256 IPs.

Optional — defaults to Cloudflare. See DNS providers for all resolver options.