IPv4 is four number groups running out of space; IPv6 is the long-format successor carrying new traffic.
Short answer
IPv4 looks like 203.0.113.45 In practice, open the linked tool below and compare your live values with the explanations that follow.
How it works
IPv4 vs IPv6 comes down to reading documented browser signals and interpreting them honestly — including when the browser withholds them.
- IPv4 looks like 203.0.113.45
- IPv6 looks like 2001:db8::1
- Most devices use both, preferring IPv6 where available
At a glance
| Signal | What you learn |
|---|---|
| Browser report | Live values for this device right now |
| Withheld fields | Privacy protections, not hardware faults |
| Best next step | Use the related tool to verify your own setup |
Practical steps
- Open the related tool and note the highlighted rows.
- Compare them with the points above.
- If something looks off, check zoom, extensions and private mode, then retest.
Try it live: open the related checker and see your own values.
Related reading
Bottom line: Most devices use both, preferring IPv6 where available When in doubt, trust the live tool over memory — browsers change, and support varies by browser.