Subnet + User Agent
Calculated or parsed on your device without transmitting the input.
Fast, private network diagnostics
IPv6 Connectivity Test
Start with one automatic SuperTool report, then open any focused DNS, email, RDAP, SSL or network check—without an account.
Network tools44 capabilities
Network Tools / IPv6 Test
Privacy-first
IPv6 Connectivity Test
Check whether this browser has working public IPv6 connectivity.
Ready to test this connection
The check makes one lightweight request over the IPv6 path.
Public API
How this result is produced
VPNs, relays and enterprise networks can change the result.Separate IPv6-only and IPv4 endpoints test this browser's public connectivity.
Tool guide
What does this tool do?
The IPv6 Test checks whether this browser can reach the IPv6 internet and compares the detected IPv6 and IPv4 paths. It is useful because many networks are dual-stack: IPv4 may work normally while IPv6 is missing, filtered or routed differently. A quick browser-level test helps separate local connection problems from DNS or website configuration issues.
How to use
- Open the IPv6 Test tool from your current network.
- Run the test and wait for the IPv6-only endpoint check.
- Compare the detected IPv4 and IPv6 values.
- Use DNS Lookup to check whether a site publishes AAAA records.
When to use
- Confirming whether an ISP, VPN or office network supports IPv6.
- Troubleshooting slow or inconsistent access to dual-stack websites.
- Checking a device before publishing AAAA records for a service.
How it works
The test makes lightweight requests over separate IPv4 and IPv6-capable endpoints. Browser relays, VPNs and enterprise gateways can change the apparent result.
Built for quick answers
Clean results without dashboards, accounts or unnecessary steps.
Lightweight by design
Local calculation and public standards keep infrastructure costs low.
Privacy-respecting
NexKit does not create a searchable history of your network queries. Cloudflare Web Analytics measures aggregate visits and performance.
Know what you are checking
A complete toolkit for everyday network troubleshooting.
Check connectivity and identity, verify DNS and registration data, review certificates and response headers, then calculate IPv4 network ranges—all from one focused workspace.
Transparent by design
Know where every result comes from.
NexKit combines local browser calculations with public, standards-based network services. No account or NexKit query history is created.
DNS + Reverse DNS
Resolved through an encrypted public DNS-over-HTTPS request.
RDAP + Certificates
Read from authoritative registry routes and public certificate logs.
IP + IPv6 + Headers
Checked through focused public endpoints; providers may apply rate limits.
Common questions
Useful context before you act on a result.
Does NexKit store my network queries?
NexKit does not create an account or searchable query history. Tools that use public endpoints still send the minimum lookup value to the named service that produces the result.
What is the difference between DNS and reverse DNS?
DNS normally maps a hostname to records such as IP addresses. Reverse DNS maps an IP address back to an optional PTR hostname.
Is RDAP the same as WHOIS?
RDAP provides similar registration data through structured HTTPS responses. Available fields and redaction vary by registry.
Does the SSL checker connect to the live server?
It reads the newest matching public Certificate Transparency record. Use it for certificate identity and lifecycle checks, not as proof of the server's current TLS configuration.
Available now
One SuperTool plus forty-three focused tools.
What Is My IP + IP LookupLiveIPv6 TestLiveDNS LookupLiveDNS PropagationLiveDNSSEC CheckerLiveDMARC CheckerLiveSPF CheckerLiveDKIM CheckerLiveMX LookupLiveBIMI CheckerLiveMTA-STS CheckerLiveTLS-RPT CheckerLiveDomain HealthLiveCAA CheckerLiveSOA LookupLiveSRV LookupLiveIPv4 ConverterLiveNS LookupLiveTXT LookupLiveCNAME LookupLiveIPv6 ConverterLiveIP Range to CIDRLiveCIDR to IP RangeLiveSubnet Mask ConverterLiveIP in CIDRLivePunycode ConverterLivePort LookupLiveIPv6 Subnet CalculatorLiveCIDR MergeLiveMAC FormatterLiveURL ParserLiveHTTPS / SVCB LookupLiveUUID GeneratorLiveHash GeneratorLiveBase64 EncoderLiveTimestamp ConverterLiveHTTP Status LookupLiveReverse DNSLiveRDAP / WHOISLiveSSL Certificate CheckerLiveSubnet / CIDR CalculatorLiveHTTP HeadersLiveUser Agent ParserLive