IP classification
Identify private, public, CGNAT, documentation, and other special-purpose IPv4 and IPv6 ranges.
Tools
IP tools
Small, fast, server-rendered utilities for IP addresses, request metadata, and networks.
Tasks
I want to
See my public IP
Show the address, location estimate, ASN, browser, and request headers visible to websites.
Debug DNS records
Check A, AAAA, CNAME, MX, NS, TXT, and common DNS record groups for a domain.
Work with CIDR ranges
Normalize a network, calculate first and last addresses, and inspect IPv4 mask values.
Parse request metadata
Turn a browser, app, crawler, or bot user-agent string into readable fields.
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Directory
Available tools
CIDR merge and overlap
Combine adjacent and overlapping networks without adding addresses, and inspect intersections.
IPv4 and IPv6 connection test
Test both address families independently from your browser.
DNS resolver comparison
Compare Cloudflare and Google DNS answers and remaining TTLs.
Reverse DNS lookup
Find PTR hostnames for an IPv4 or IPv6 address and check whether the address has a published reverse name.
DNS lookup
Look up common DNS records for a domain, including A, AAAA, MX, TXT, NS, and canonical-name data.
IP in CIDR
Check whether an IPv4 or IPv6 address belongs to a CIDR network.
CIDR calculator
Normalize IPv4 and IPv6 networks, calculate address ranges, total addresses, IPv4 netmasks, and broadcast addresses.
Range to CIDR
Convert a start and end IPv4 or IPv6 address into the smallest covering CIDR blocks.
Subnet splitter
Split a CIDR network into smaller child networks with bounded output for large ranges.
User agent parser
Parse a browser or bot user-agent string into browser, rendering engine, operating-system, mobile, and bot signals.
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