Yes — shieldsecurity.download has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 shieldsecurity.download has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:3a18 answers · 443✓ 2606:4700:3034::ac43:9b06 answers · 443	yes
www over IPv6 www.shieldsecurity.download has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3034::6815:3a18 answers · 443✓ 2606:4700:3034::ac43:9b06 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. elsa.ns.cloudflare.com ✓gabe.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 3 redirects: HTTP 200.

https://shieldsecurity.download/ via 2606:4700:3034::6815:3a18 → 301https://shieldsecurity.download/latest via 2606:4700:3034::6815:3a18 → 301https://downloads.wordpress.org/plugin/wp-simple-firewall.latest-stable.zip via 2620:109:b00a::4206:2afa → 302https://downloads.wordpress.org/plugin/wp-simple-firewall.22.3.4.zip via 2620:109:b00a::4206:2afa → 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/shieldsecurity.download.svg)](https://aaaa.bot/shieldsecurity.download)

Check again

shieldsecurity.download Has IPv6

A (IPv4)	104.21.58.24 172.67.155.6
AAAA (IPv6)	2606:4700:3034::6815:3a18 2606:4700:3034::ac43:9b06

www.shieldsecurity.download Has IPv6

A (IPv4)	104.21.58.24 172.67.155.6
AAAA (IPv6)	2606:4700:3034::6815:3a18 2606:4700:3034::ac43:9b06

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: shieldsecurity.download
Measured 2026-11-02 02:18:21 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.21.58.24, 172.67.155.6
AAAA (IPv6): 2606:4700:3034::6815:3a18, 2606:4700:3034::ac43:9b06
www AAAA:    2606:4700:3034::6815:3a18, 2606:4700:3034::ac43:9b06

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: shieldsecurity.download has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:3a18: answers (TCP 443)
    2606:4700:3034::ac43:9b06: answers (TCP 443)
- www over IPv6: www.shieldsecurity.download has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:3034::6815:3a18: answers (TCP 443)
    2606:4700:3034::ac43:9b06: 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 3 redirects: HTTP 200.
    https://shieldsecurity.download/ via 2606:4700:3034::6815:3a18 -> HTTP 301, certificate: valid
    https://shieldsecurity.download/latest via 2606:4700:3034::6815:3a18 -> HTTP 301, certificate: valid
    https://downloads.wordpress.org/plugin/wp-simple-firewall.latest-stable.zip via 2620:109:b00a::4206:2afa -> HTTP 302, certificate: valid
    https://downloads.wordpress.org/plugin/wp-simple-firewall.22.3.4.zip via 2620:109:b00a::4206:2afa -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/wZtKnKuicZ

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

Checked 2026-11-02 02:18:21 UTC. Full DNS report: dns.pizza/domain/shieldsecurity.download · JSON: /api/v1/shieldsecurity.download