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Tools
Your connection
Find My IP
Find your local IP on any device
Change My IP
Get a new IP, step by step
WebRTC Leak Test
Is your local IP exposed?
Email & deliverability
Blacklist Check
Is your IP on a DNSBL?
Reverse DNS
Hostname behind an IP (FCrDNS)
Email DNS Checker
SPF, DKIM & DMARC lookup
DNS & performance
DNS Speed Test
Fastest public DNS for you
Latency Test
RTT & jitter to our node
Lookups & developer tools
Bulk IP Audit
Check up to 10 IPs at once
MAC Lookup
Find a device's manufacturer
Link Expander
See where a short link goes
Request Headers
See what your browser sends
User-Agent Parser
Decode your browser string
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Network diagnostic tools
Free, account-free, and built to keep nothing. Pick what you’re troubleshooting.
Blacklist Check
See whether your IP sits on major email DNS blocklists.
WebRTC Leak Test
Check whether your browser exposes a local or VPN-bypassing IP.
Reverse DNS
Find the hostname (PTR) behind any IPv4 address.
Bulk IP Audit
Audit up to 10 IPs at once — rDNS, blocklist, geolocation.
Latency Test
Measure real round-trip time and jitter to our node.
DNS Speed Test
Time Cloudflare, Google, Quad9 & more from your connection.
MAC Lookup
Find the manufacturer behind any MAC address.
Link Expander
See where a short link really goes, safely.
Email DNS Checker
Look up SPF, DKIM & DMARC records for a domain.
Request Headers
See the exact HTTP headers your browser or client sends.
User-Agent Parser
Decode your browser’s User-Agent and check it’s consistent.
Change My IP
Steps to get a new IP on mobile, desktop, or router — honestly.
Find My IP
Find your local IP on any device — PC, phone, printer, console.
0
IPs logged or stored
2
stacks shown (v4 & v6)
8+
diagnostic tools
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lookups, always free