Yes — merriam-webster.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 merriam-webster.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested). ✓ 2600:9000:244d:da00:c:3d32:e340:93a1 answers · 443✓ 2600:9000:244d:9e00:c:3d32:e340:93a1 answers · 443✓ 2600:9000:244d:7200:c:3d32:e340:93a1 answers · 443✓ 2600:9000:244d:5a00:c:3d32:e340:93a1 answers · 443– 2600:9000:244d:6600:c:3d32:e340:93a1 not tested– 2600:9000:244d:8e00:c:3d32:e340:93a1 not tested– 2600:9000:244d:b400:c:3d32:e340:93a1 not tested– 2600:9000:244d:1200:c:3d32:e340:93a1 not tested	yes
www over IPv6 www.merriam-webster.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:10::6814:2dc7 answers · 443✓ 2606:4700:10::ac42:96c4 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. smtp.google.com ✓	yes
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns-1084.awsdns-07.org ✓ns-1998.awsdns-57.co.uk ✓ns-323.awsdns-40.com ✓ns-636.awsdns-15.net ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 403.

https://merriam-webster.com/ via 2600:9000:244d:da00:c:3d32:e340:93a1 → 301https://www.merriam-webster.com/ via 2606:4700:10::6814:2dc7 → 403

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/merriam-webster.com.svg)](https://aaaa.bot/merriam-webster.com)

Check again

merriam-webster.com Has IPv6

A (IPv4)	3.162.112.58 3.162.112.64 3.162.112.129 3.162.112.97
AAAA (IPv6)	2600:9000:244d:da00:c:3d32:e340:93a1 2600:9000:244d:9e00:c:3d32:e340:93a1 2600:9000:244d:7200:c:3d32:e340:93a1 2600:9000:244d:5a00:c:3d32:e340:93a1 2600:9000:244d:6600:c:3d32:e340:93a1 2600:9000:244d:8e00:c:3d32:e340:93a1 2600:9000:244d:b400:c:3d32:e340:93a1 2600:9000:244d:1200:c:3d32:e340:93a1

www.merriam-webster.com Has IPv6

Alias of	www.merriam-webster.com.cdn.cloudflare.net
A (IPv4)	172.66.150.196 104.20.45.199
AAAA (IPv6)	2606:4700:10::6814:2dc7 2606:4700:10::ac42:96c4

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: merriam-webster.com
Measured 2026-10-31 13:27:06 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    3.162.112.58, 3.162.112.64, 3.162.112.129, 3.162.112.97
AAAA (IPv6): 2600:9000:244d:da00:c:3d32:e340:93a1, 2600:9000:244d:9e00:c:3d32:e340:93a1, 2600:9000:244d:7200:c:3d32:e340:93a1, 2600:9000:244d:5a00:c:3d32:e340:93a1, 2600:9000:244d:6600:c:3d32:e340:93a1, 2600:9000:244d:8e00:c:3d32:e340:93a1, 2600:9000:244d:b400:c:3d32:e340:93a1, 2600:9000:244d:1200:c:3d32:e340:93a1
www AAAA:    2606:4700:10::6814:2dc7, 2606:4700:10::ac42:96c4

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: merriam-webster.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
    2600:9000:244d:da00:c:3d32:e340:93a1: answers (TCP 443)
    2600:9000:244d:9e00:c:3d32:e340:93a1: answers (TCP 443)
    2600:9000:244d:7200:c:3d32:e340:93a1: answers (TCP 443)
    2600:9000:244d:5a00:c:3d32:e340:93a1: answers (TCP 443)
    2600:9000:244d:6600:c:3d32:e340:93a1: not tested
    2600:9000:244d:8e00:c:3d32:e340:93a1: not tested
    2600:9000:244d:b400:c:3d32:e340:93a1: not tested
    2600:9000:244d:1200:c:3d32:e340:93a1: not tested
- www over IPv6: www.merriam-webster.com has 2 IPv6 addresses and answers on every one we tested.
    2606:4700:10::6814:2dc7: answers (TCP 443)
    2606:4700:10::ac42:96c4: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 4 of 4 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 1 redirect: HTTP 403.
    https://merriam-webster.com/ via 2600:9000:244d:da00:c:3d32:e340:93a1 -> HTTP 301, certificate: valid
    https://www.merriam-webster.com/ via 2606:4700:10::6814:2dc7 -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/FTqVvXesWg

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

Checked 2026-10-31 13:27:06 UTC. Full DNS report: dns.pizza/domain/merriam-webster.com · JSON: /api/v1/merriam-webster.com