Yes — sigmahub.site has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 sigmahub.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:63de:7845:c7c9:104e:4f4b answers · 443✓ 2a02:4780:84:f67b:2281:7dda:2587:6efc answers · 443	yes
www over IPv6 www.sigmahub.site has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:4a:89d3:f1eb:b25c:8e9:88b8 answers · 443✓ 2a02:4780:4c:5c08:c45e:e346:8644:f14d 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. aster.dns-parking.com ✓helios.dns-parking.com ✓	yes

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

https://sigmahub.site/ via 2a02:4780:84:63de:7845:c7c9:104e:4f4b → 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/sigmahub.site.svg)](https://aaaa.bot/sigmahub.site)

Check again

sigmahub.site Has IPv6

A (IPv4)	2.57.91.143 84.32.84.170
AAAA (IPv6)	2a02:4780:84:63de:7845:c7c9:104e:4f4b 2a02:4780:84:f67b:2281:7dda:2587:6efc

www.sigmahub.site Has IPv6

Alias of	www.sigmahub.site.cdn.hstgr.net
A (IPv4)	88.222.222.240 84.32.84.206
AAAA (IPv6)	2a02:4780:4a:89d3:f1eb:b25c:8e9:88b8 2a02:4780:4c:5c08:c45e:e346:8644:f14d

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: sigmahub.site
Measured 2026-10-31 02:44:27 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    2.57.91.143, 84.32.84.170
AAAA (IPv6): 2a02:4780:84:63de:7845:c7c9:104e:4f4b, 2a02:4780:84:f67b:2281:7dda:2587:6efc
www AAAA:    2a02:4780:4a:89d3:f1eb:b25c:8e9:88b8, 2a02:4780:4c:5c08:c45e:e346:8644:f14d

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: sigmahub.site has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:63de:7845:c7c9:104e:4f4b: answers (TCP 443)
    2a02:4780:84:f67b:2281:7dda:2587:6efc: answers (TCP 443)
- www over IPv6: www.sigmahub.site has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:4a:89d3:f1eb:b25c:8e9:88b8: answers (TCP 443)
    2a02:4780:4c:5c08:c45e:e346:8644:f14d: 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://sigmahub.site/ via 2a02:4780:84:63de:7845:c7c9:104e:4f4b -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/yrSdv1o04f

Permanent link: aaaa.bot/r/yrSdv1o04f · How we measure

Checked 2026-10-31 02:44:27 UTC. Full DNS report: dns.pizza/domain/sigmahub.site · JSON: /api/v1/sigmahub.site