Yes — workers.dev has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 workers.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:c0f answers · 443✓ 2606:4700::6812:d0f answers · 443	yes
www over IPv6 www.workers.dev has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:c0f answers · 443✓ 2606:4700::6812:d0f 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. clyde.ns.cloudflare.com ✓sofia.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://workers.dev/ via 2606:4700::6812:c0f → 301https://workers.cloudflare.com/ via 2606:4700::6810:c483 → 301https://www.cloudflare.com/products/workers/ via 2606:4700::6810:7b60 → 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/workers.dev.svg)](https://aaaa.bot/workers.dev)

Check again

workers.dev Has IPv6

A (IPv4)	104.18.12.15 104.18.13.15
AAAA (IPv6)	2606:4700::6812:c0f 2606:4700::6812:d0f

www.workers.dev Has IPv6

A (IPv4)	104.18.12.15 104.18.13.15
AAAA (IPv6)	2606:4700::6812:c0f 2606:4700::6812:d0f

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: workers.dev
Measured 2026-10-30 19:38:26 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.12.15, 104.18.13.15
AAAA (IPv6): 2606:4700::6812:c0f, 2606:4700::6812:d0f
www AAAA:    2606:4700::6812:c0f, 2606:4700::6812:d0f

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: workers.dev has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:c0f: answers (TCP 443)
    2606:4700::6812:d0f: answers (TCP 443)
- www over IPv6: www.workers.dev has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:c0f: answers (TCP 443)
    2606:4700::6812:d0f: 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://workers.dev/ via 2606:4700::6812:c0f -> HTTP 301, certificate: valid
    https://workers.cloudflare.com/ via 2606:4700::6810:c483 -> HTTP 301, certificate: valid
    https://www.cloudflare.com/products/workers/ via 2606:4700::6810:7b60 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/6_6tZk2EMX

Permanent link: aaaa.bot/r/6_6tZk2EMX · How we measure

Checked 2026-10-30 19:38:26 UTC. Full DNS report: dns.pizza/domain/workers.dev · JSON: /api/v1/workers.dev