IPv6 Leak Test
IPv6 Leak Test checks whether a device has IPv6 connectivity and displays connection information related to privacy.
About IPv6 Leak Test
IPv6 Leak Test is a web-based tool that checks whether the device you are using has IPv6 connectivity and displays connection information related to privacy. It also tests the IPv6 readiness of a domain by looking at its DNS records. The page states that it requires JavaScript and is meant purely as a testing tool.
If the connection uses an IPv6 address that embeds the device's MAC address, the page warns that this value can identify the computer and its network interface even when connected to another network. It suggests enabling privacy extensions. The domain test results are based solely on DNS and may be affected by caching.
Key features
- Shows whether the current connection supports IPv4 and IPv6
- Warns when an IPv6 address contains an embedded MAC address
- Tests the IPv6 readiness of a domain you enter
- Reports IPv6 status for a domain's nameservers, www host and mail exchangers
- Runs an IPv6-only DNS test for a domain
- Maintains a Hall of Fame of domains scoring five stars
Best for: Network and system administrators, and customers who want to check whether their internet provider supports IPv6.
Good for
- Gives a specific privacy note about embedded MAC addresses and suggests enabling privacy extensions
- Breaks domain results down by nameservers, www host and mail exchangers
- Explains common causes of failed IPv6-only tests, such as missing glue records
Watch out for
- Requires JavaScript to function
- Domain test outcomes are based solely on DNS and are susceptible to caching
- Described as a testing tool only, not a source of general information about IPv6
IPv6 Leak Test at a glance
- Website
- ip6.nl
- Category
- Privacy & Security › Security Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Security Tools
IPv6 Leak Test alternatives
Tools and sites you could use instead, ranked by how closely they match.
Test a browser for privacy leaks, including exposed IP addresses, device information, and fingerprinting risks.
Check browser fingerprints and run DNS leak, IP, port, and WebRTC tests with BrowserScan.
Proxy Check provides a proxy detection API for identifying proxy connections used in online services and game servers.
Freemium
24 alternatives
Test browser fingerprinting characteristics with CreepJS, which displays fingerprint and WebRTC results.
SSL Labs provides tools for testing SSL and TLS configurations and related public key infrastructure.
Free trial
24 alternatives
Test-IPv6 checks whether a browser and network connection can reach IPv6 resources.
Popular in Security Tools
Well-known listings from the same topic.
Online Password Hash Crackonlinehashcrack.comOTP Authapps.apple.com/app/otp-auth/id659877384MD5 reverse lookupmd5.gromweb.comMozilla SSLssl-config.mozilla.orgchallenges.rechallenges.reGoPlus Locker V3gopluslabs.io
IPv6 Leak Test FAQ
Why does the page warn about privacy?
If the IPv6 address contains the device's MAC address, that value uniquely identifies the computer and its network interface, even when connected to another network. The page suggests enabling privacy extensions.
Why might a domain fail the IPv6-only test even if it has IPv6 nameservers?
The page says this is usually because the IPv6 nameservers are not reachable, or because glue records are missing, meaning the nameserver IPv6 addresses are not registered with the domain registry. The page advises contacting the domain name registrar.
Does the test work without JavaScript?
No. The page states that it requires JavaScript and asks users to enable client-side scripting and reload the page.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.