WhatsMyConnectionNetwork Intelligence

Connection guide

IPv4 vs IPv6

IPv4 vs IPv6 is the difference between the older 32-bit address system and the newer 128-bit address system. A dual-stack connection can support both, but each page request still reaches the server over one address family.

Check your address family Open JSON connection data Learn about ASNs
IPv4203.0.113.7

Short dotted-decimal addresses. Still common across residential, mobile, hosting, and enterprise networks.

IPv62001:db8::7

Longer hexadecimal addresses with a much larger address space and native end-to-end routing goals.

Why only one family appears first

The server-rendered page can show the public IP address Cloudflare saw for this exact request. If the browser chose IPv6, the request arrives as IPv6. If it chose IPv4, it arrives as IPv4.

  • Dual-stack means both families may be available, not that every request uses both.
  • Browser connection racing can choose one family based on reachability and network behavior.
  • WhatsMyConnection keeps separate first-party browser probes pending until dedicated IPv4 and IPv6 sidecar hosts are verified.

What to check

Use the homepage for the address used on your visit. Use /api/ip for machine-readable connection data, including ipVersion, ASN, edge colo, TLS details, and browser metadata.

IPv4 and IPv6 FAQ

What is IPv4?

IPv4 is the older Internet Protocol address format. It uses 32-bit addresses such as 203.0.113.7.

What is IPv6?

IPv6 is the newer Internet Protocol address format. It uses 128-bit addresses such as 2001:db8::7 and provides a much larger address space.

Why do I see only IPv4 or only IPv6 on a dual-stack connection?

A page request arrives over one address family. The homepage reports that observed family and keeps separate first-party family probes pending until they are verified.