IPv6 Checker — Your Connection & Any Domain
IPv6 is the internet's addressing system with room to grow — and adoption is patchy. Two quick tests: whether your own line can speak IPv6, and whether any website you care about can be reached on it.
IPv6 Checker
About the IPv6 Checker
Every device on the internet needs an address. The old system, IPv4, has about 4.3 billion of them — formally exhausted worldwide for years, which is why addresses are bought, sold, shared and carrier-graded behind NATs. IPv6 is the replacement: 340 undecillion addresses, built into every phone and laptop sold this decade, but still not switched on everywhere — the adoption map is a patchwork of ISPs, mobile networks and office routers that each say yes or no.
That patchwork has practical effects. A line without IPv6 often sits behind double NAT — two layers of address translation that slow gaming, complicate camera and CCTV remote access, and make self-hosting anything a port-forwarding puzzle. A website without AAAA records is invisible to IPv6-only visitors — still rare in Pakistan, growing in parts of the world, and increasingly read by search systems as a sign of a dated setup. Knowing which side of the patchwork you and your sites are on takes thirty seconds with this tool.
The tool runs two independent tests. Test one asks two public endpoints what address they see you coming from: one speaks only IPv4, the other prefers IPv6 when available — comparing the two tells you exactly what your current network supports, no router login required. Test two queries Google's public DNS for any domain's AAAA records — the IPv6 equivalent of the familiar A record — and reports whether the site answers on the new addressing system and from which address family your own test came.
How to Use the IPv6 Checker
Follow these simple steps — the whole process takes under a minute:
- Press Test My Connection — the tool reads the address your network presents to two public endpoints, one per protocol.
- Read your verdict — an IPv6 address shown means your line speaks IPv6; only an IPv4 address means it does not (or the browser fell back).
- Type any website in the domain field — its AAAA records are fetched live from Google Public DNS.
- Compare the two — a site with AAAA records plus a line with IPv6 means end-to-end IPv6 is possible between you and that site today.
- Note the prefixes — addresses starting 2400: are APNIC-region allocations commonly seen from Pakistani ISPs; 2a0x- prefixes are European.
The Formula & Method Behind the IPv6 Checker
The connection test exploits a property of the dual-stack internet. The endpoint api.ipify.org answers only over IPv4 and reports that address. Its sibling api64.ipify.org answers over both protocols, and the browser picks IPv6 first when its network offers it — so the address that endpoint reports is your IPv6 address when one exists, and your IPv4 address when it does not. Comparing the two strings: a colon-containing answer means native IPv6 on your line; a dot-containing answer on both means your network is IPv4-only or IPv6-broken.
The domain test is one DNS query for type AAAA through Google's public resolver. A records map names to IPv4 addresses; AAAA records map the same names to IPv6 addresses — 128-bit values written as eight groups of four hex digits. A domain with both A and AAAA answers is dual-stack: reachable from every visitor, old and new. A domain with A only is IPv4-only — fine today, and an increasingly visible gap for international visitors on mobile networks that are IPv6-heavy.
Reading the addresses tells its own story. Pakistani ISPs typically hand out IPv6 from 2400:xxxx blocks (APNIC's region), mobile operators included. Addresses beginning fe80: are link-local — only valid inside your own local network, never routed to the internet — and their appearance in a test usually means the router offered IPv6 internally without providing internet service over it. Private-use IPv4 ranges (192.168.x.x, 10.x.x.x) shown by the IPv4 endpoint mean heavy carrier-grade NAT upstream.
What to Do With Your Result
No IPv6 on your line? Ask your ISP — Pakistani fibre and DSL providers can usually enable it on request at no charge, and mobile data networks increasingly carry it by default. Until then you live behind NAT: fine for browsing, occasionally painful for gaming, CCTV remote view or hosting anything at home.
IPv6 works but some sites feel broken? That is the classic half-broken configuration: the router advertises IPv6 but the connection is not actually delivering it, so browsers try IPv6 first, time out, then fall back — a two-second penalty on every site. The fix is router-side (disable broken IPv6 or repair the tunnel), and the retest here should show either a working colon-address or a clean fallback.
Your own site has no AAAA records? If your site sits behind Cloudflare, IPv6 is a toggle (enable IPv6 compatibility in the DNS settings) and the AAAA records appear automatically. Direct hosting: your provider must assign an IPv6 address and you publish an AAAA record next to the A record. Then verify here, and confirm global consistency with the DNS propagation checker.
Why this matters more each year. Mobile carriers across South Asia now run large IPv6 shares, some international visitors reach sites only over IPv6, and new address-hungry services simply assume it. IPv6 readiness is a fifteen-minute task today and a five-site migration problem in a few years — the DNS lookup shows both record families for any domain in one view.
Frequently Asked Questions
Quick answers about the IPv6 Checker — for anything else, message us on WhatsApp.
The two endpoints showed the same IPv4 address — is my IPv6 broken?
It means your browser reached both over IPv4, which happens when your network has no usable IPv6 — or has broken IPv6 that the browser abandoned. If sites load with a noticeable two-second delay on some connections, suspect the broken case: the fix lives in the router, not the browser.
Is having IPv6 a security or privacy risk?
IPv6 itself is as safe as IPv4 — the security model is the same with bigger addresses. Privacy differs slightly: some IPv6 addresses embed a device identifier, which modern systems solve with temporary privacy addresses enabled by default on every major OS. Firewalls and NAT-free networking need the same care as always.
My website shows AAAA records — do I need to change anything?
Nothing. Dual-stack is the ideal state: every visitor reaches you over whichever protocol their network speaks. Just keep the AAAA record updated if you ever change hosts, and remember Cloudflare-style proxies publish their own edge addresses rather than your server's — that is normal and desirable.
Why do Pakistani ISPs mostly lack IPv6 while mobile data has it?
Mobile networks modernised recently and launched IPv6 from day one; fixed-line ISPs run older equipment and have less pressure because CGNAT hides the IPv4 shortage from most users. The demand signal is user requests — asking your ISP for IPv6 genuinely moves the needle, and several providers enable it per-account on request.
What are the fe80: and 2400: prefixes I see?
fe80: addresses are link-local — valid only inside your own local network, used for autoconfiguration and never routed to the internet. 2400: addresses come from APNIC, the regional registry covering Pakistan and Asia-Pacific — a 2400-prefixed public address in your test is a normal, healthy IPv6 allocation from a local ISP.
Does IPv6 make my internet faster?
Not inherently — speed depends on bandwidth and routing. The gains are structural: no double-NAT latency for gaming and voice, simpler peer-to-peer, and no shared-address throttling. Many IPv6 paths also skip CGNAT hops, which shaves a few milliseconds and a point of jitter on connections that previously bounced through carrier NAT.
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