Yes — servecal.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 servecal.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::ac43:c40c answers · 443✓ 2606:4700:3034::6815:5a3c answers · 443	yes
www over IPv6 www.servecal.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3035::ac43:c40c answers · 443✓ 2606:4700:3034::6815:5a3c 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. brit.ns.cloudflare.com ✓sterling.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 2 redirects: HTTP 200.

https://servecal.com/ via 2606:4700:3035::ac43:c40c → 301https://servecal.org/ via 2606:4700:3033::6815:5112 → 302https://gpersonal.cloudflareaccess.com/cdn-cgi/access/login/servecal.org?kid=0a1d5ce9768274efca2085f85db573b4c2b0aa13866588bc03c0a32209d6b92b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjM5OTJiYWVmY2IxMGJlOThhMjRlNGY4ZDZkYTcxMjRkMzc5YzI5MzJhOTJhNGM3NmQ5ZTRiMGI4YTAyZGEzYTYifQ.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.GpXsEDgR5Um07CX6VYPg-QgWycRkQksVl0__aGXavPvupFc8H4YXJI2oCT--Zzq8D_i787ymMRmU8R_MgWnAnP-ScdgmPOCVOblR6LO0VGEu1_DdjliD8VzrklV5hxDVLZBiKj8G7UukDF1VAq0g3pESkg6tjq3oxxkN5_K2twg-h1Z97XNV6WzvsyWPFT72NnEI0I0TLnCHifOv90fee-FID2Hb6kNQR5Pygn6CE2BkFdOHR3CndacgW5hXuk3Sw055vhVwT4kyNxBpeyEtVcDesF_WUe93_otXWiu6ELENLgEc-gayGPYX1PVBzwJ02FgltE4cuHT95frF4baUag&redirect_url=%2F via 2606:4700:300a::6813:c31d → 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/servecal.com.svg)](https://aaaa.bot/servecal.com)

Check again

servecal.com Has IPv6

A (IPv4)	104.21.90.60 172.67.196.12
AAAA (IPv6)	2606:4700:3035::ac43:c40c 2606:4700:3034::6815:5a3c

www.servecal.com Has IPv6

A (IPv4)	104.21.90.60 172.67.196.12
AAAA (IPv6)	2606:4700:3035::ac43:c40c 2606:4700:3034::6815:5a3c

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: servecal.com
Measured 2026-11-11 10:58:34 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.90.60, 172.67.196.12
AAAA (IPv6): 2606:4700:3035::ac43:c40c, 2606:4700:3034::6815:5a3c
www AAAA:    2606:4700:3035::ac43:c40c, 2606:4700:3034::6815:5a3c

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: servecal.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::ac43:c40c: answers (TCP 443)
    2606:4700:3034::6815:5a3c: answers (TCP 443)
- www over IPv6: www.servecal.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3035::ac43:c40c: answers (TCP 443)
    2606:4700:3034::6815:5a3c: 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 after 2 redirects: HTTP 200.
    https://servecal.com/ via 2606:4700:3035::ac43:c40c -> HTTP 301, certificate: valid
    https://servecal.org/ via 2606:4700:3033::6815:5112 -> HTTP 302, certificate: valid
    https://gpersonal.cloudflareaccess.com/cdn-cgi/access/login/servecal.org?kid=0a1d5ce9768274efca2085f85db573b4c2b0aa13866588bc03c0a32209d6b92b&meta=eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjM5OTJiYWVmY2IxMGJlOThhMjRlNGY4ZDZkYTcxMjRkMzc5YzI5MzJhOTJhNGM3NmQ5ZTRiMGI4YTAyZGEzYTYifQ.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.GpXsEDgR5Um07CX6VYPg-QgWycRkQksVl0__aGXavPvupFc8H4YXJI2oCT--Zzq8D_i787ymMRmU8R_MgWnAnP-ScdgmPOCVOblR6LO0VGEu1_DdjliD8VzrklV5hxDVLZBiKj8G7UukDF1VAq0g3pESkg6tjq3oxxkN5_K2twg-h1Z97XNV6WzvsyWPFT72NnEI0I0TLnCHifOv90fee-FID2Hb6kNQR5Pygn6CE2BkFdOHR3CndacgW5hXuk3Sw055vhVwT4kyNxBpeyEtVcDesF_WUe93_otXWiu6ELENLgEc-gayGPYX1PVBzwJ02FgltE4cuHT95frF4baUag&redirect_url=%2F via 2606:4700:300a::6813:c31d -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/jpMC-uTn-A

Permanent link: aaaa.bot/r/jpMC-uTn-A · How we measure

Checked 2026-11-11 10:58:34 UTC. Full DNS report: dns.pizza/domain/servecal.com · Age, certificate and blocklists: how.is/servecal.com · JSON: /api/v1/servecal.com