Networking Tools
Diagnose and inspect your network — ping, DNS, IP and port tools for developers, admins and curious users.
28 free tools · everything runs in your browser
IP Calculator
Calculate IP subnet information for IPv4 and IPv6. Network, broadcast, host range and binary.
Open ToolIP to PTR Record
Convert IPv4 and IPv6 addresses to PTR (reverse DNS) records for zone files.
Open ToolIPv4 CIDR Reference
Complete IPv4 CIDR notation reference table with subnet masks and host counts.
Open ToolIPv6 CIDR Reference
Complete IPv6 CIDR notation reference with address ranges and subnet calculations.
Open ToolRoot Zone Database
Browse all top-level domains (TLDs) — gTLDs, ccTLDs and their registry operators.
Open ToolASN Assignments
Autonomous System Number (ASN) allocations from IANA by Regional Internet Registry.
Open ToolDNS Lookup
Look up DNS records for any domain. Check A, AAAA, MX, NS, TXT, and CNAME records.
Open ToolWhois Lookup
Look up domain registration information. Find domain owner, registrar, and expiration date.
Open ToolHTTP Header Checker
Check HTTP headers of any URL. Analyze server response headers for security and performance.
Open Tool