Yes — fastmobileseochecker.xyz has IPv6.

Has both IPv4 (A) and IPv6 (AAAA) addresses.

This is a saved measurement from 2026-11-02 05:13 UTC. Check fastmobileseochecker.xyz live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 fastmobileseochecker.xyz has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:424a answers · 443✓ 2606:4700:3034::ac43:a813 answers · 443	yes
www over IPv6 www.fastmobileseochecker.xyz has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3031::6815:424a answers · 443✓ 2606:4700:3034::ac43:a813 answers · 443	yes
Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. dora.ns.cloudflare.com ✓jasper.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate: HTTP 200.

https://fastmobileseochecker.xyz/ via 2606:4700:3031::6815:424a → 200

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/fastmobileseochecker.xyz.svg)](https://aaaa.bot/fastmobileseochecker.xyz)

Check again

fastmobileseochecker.xyz Has IPv6

A (IPv4)	104.21.66.74 172.67.168.19
AAAA (IPv6)	2606:4700:3031::6815:424a 2606:4700:3034::ac43:a813

www.fastmobileseochecker.xyz Has IPv6

A (IPv4)	172.67.168.19 104.21.66.74
AAAA (IPv6)	2606:4700:3031::6815:424a 2606:4700:3034::ac43:a813

Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).

Copy the evidence — a citation-ready record of this measurement

IPv6 measurement: fastmobileseochecker.xyz
Measured 2026-11-02 05:13:14 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.66.74, 172.67.168.19
AAAA (IPv6): 2606:4700:3031::6815:424a, 2606:4700:3034::ac43:a813
www AAAA:    2606:4700:3031::6815:424a, 2606:4700:3034::ac43:a813

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: fastmobileseochecker.xyz has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::6815:424a: answers (TCP 443)
    2606:4700:3034::ac43:a813: answers (TCP 443)
- www over IPv6: www.fastmobileseochecker.xyz has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3031::6815:424a: answers (TCP 443)
    2606:4700:3034::ac43:a813: answers (TCP 443)
- Mail servers (MX) have IPv6: No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record.
- Nameservers have IPv6: 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.

Reachability = a TCP connection opened on port 443 (or 80).

HTTPS over IPv6 (not graded): Loads over IPv6 with a valid certificate: HTTP 200.
    https://fastmobileseochecker.xyz/ via 2606:4700:3031::6815:424a -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/NSgMhp2dHP

Permanent link: aaaa.bot/r/NSgMhp2dHP · How we measure

Checked 2026-11-02 05:13:14 UTC. Full DNS report: dns.pizza/domain/fastmobileseochecker.xyz · JSON: /api/v1/fastmobileseochecker.xyz