Check my IPv6 address
Confirm dual-stack reachability with a lightweight page that also shows your IPv4 details.
Live snapshot
Connection report
IP address
IPv6 address
IPv6 address
🇺🇸 United States
Headers
Request headers
8 headers
| Header | Value |
|---|---|
| accept | */* |
| accept-encoding | gzip, br, zstd, deflate |
| cache-control | max-age=259200 |
| connection | close |
| host | nossl.sh |
| user-agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| via | 1.1 squid-proxy-5b5d847c96-788gb (squid/6.13) |
| x-forwarded-for | 216.73.216.63 |
Confirm IPv6 reachability
Load nossl.sh to see IPv4 immediately, then let the built-in v6 probe surface your IPv6 address when the network provides one.
The page stays minimal so it still works behind captive portals that block heavier IPv6 testers.
- Shows IPv6 only when the network announces it.
- Copies IPv6 to the clipboard for tickets or chats.
- Uses HTTP only to avoid TLS hiccups during onboarding.
Why this beats generic IPv6 testers
Most IPv6 tools assume HTTPS. nossl.sh keeps things plain while still providing shareable reports and header captures.
- Optional JSON API for automation.
- Share link bundles both IPs and headers.
- Works in kiosk, console, and smart TV browsers.
What if no IPv6 appears?
You will still see your IPv4. If IPv6 stays blank, your network likely has no native IPv6 or is blocking the v6.nossl.sh probe.
Can I check IPv6 from the terminal?
Yes. Run curl http://v6.nossl.sh to print your IPv6 address with a trailing newline.
Quick steps to trigger captive portals
Apple captive portal check
Open the official Apple CNA page to force the captive assistant on iOS and macOS devices.
Open Apple captive portalAndroid captive portal check
Use the Android connectivity check URL that devices call before presenting the portal dialog.
Open Android captive portal