Yes — sslexpirytool.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 sslexpirytool.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:84b3:f171:57b:8fde:2539 answers · 443✓ 2a02:4780:84:1cd6:7eba:7040:dba4:cc16 answers · 443	yes
www over IPv6 www.sslexpirytool.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:1d:a11b:c409:c938:6f9:b210 answers · 443✓ 2a02:4780:21:bb4c:6745:6ae:4b39:b42f 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. apollo.dns-parking.com ✓athena.dns-parking.com ✓	yes

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

https://sslexpirytool.com/ via 2a02:4780:84:84b3:f171:57b:8fde:2539 → 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/sslexpirytool.com.svg)](https://aaaa.bot/sslexpirytool.com)

Check again

sslexpirytool.com Has IPv6

A (IPv4)	2.57.91.6 84.32.84.236
AAAA (IPv6)	2a02:4780:84:84b3:f171:57b:8fde:2539 2a02:4780:84:1cd6:7eba:7040:dba4:cc16

www.sslexpirytool.com Has IPv6

Alias of	www.sslexpirytool.com.cdn.hstgr.net
A (IPv4)	2.57.91.27 84.32.84.165
AAAA (IPv6)	2a02:4780:1d:a11b:c409:c938:6f9:b210 2a02:4780:21:bb4c:6745:6ae:4b39:b42f

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: sslexpirytool.com
Measured 2026-11-08 03:47:21 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    2.57.91.6, 84.32.84.236
AAAA (IPv6): 2a02:4780:84:84b3:f171:57b:8fde:2539, 2a02:4780:84:1cd6:7eba:7040:dba4:cc16
www AAAA:    2a02:4780:1d:a11b:c409:c938:6f9:b210, 2a02:4780:21:bb4c:6745:6ae:4b39:b42f

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: sslexpirytool.com has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:84b3:f171:57b:8fde:2539: answers (TCP 443)
    2a02:4780:84:1cd6:7eba:7040:dba4:cc16: answers (TCP 443)
- www over IPv6: www.sslexpirytool.com has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:1d:a11b:c409:c938:6f9:b210: answers (TCP 443)
    2a02:4780:21:bb4c:6745:6ae:4b39:b42f: 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://sslexpirytool.com/ via 2a02:4780:84:84b3:f171:57b:8fde:2539 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/ELVOCL1N5C

Permanent link: aaaa.bot/r/ELVOCL1N5C · How we measure

Checked 2026-11-08 03:47:21 UTC. Full DNS report: dns.pizza/domain/sslexpirytool.com · Age, certificate and blocklists: how.is/sslexpirytool.com · JSON: /api/v1/sslexpirytool.com