Yes — plesk.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 plesk.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a06:98c1:3105::ac40:9387 answers · 443✓ 2a06:98c1:3107::6812:2879 answers · 443	yes
www over IPv6 www.plesk.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a06:98c1:3107::6812:2879 answers · 443✓ 2a06:98c1:3105::ac40:9387 answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. plesk-com.mail.protection.outlook.com ✓	yes
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. gene.ns.cloudflare.com ✓jeff.ns.cloudflare.com ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.

https://plesk.com/ via 2a06:98c1:3105::ac40:9387 → 301https://www.plesk.com/ via 2a06:98c1:3107::6812:2879 → 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/plesk.com.svg)](https://aaaa.bot/plesk.com)

Check again

plesk.com Has IPv6

A (IPv4)	104.18.40.121 172.64.147.135
AAAA (IPv6)	2a06:98c1:3105::ac40:9387 2a06:98c1:3107::6812:2879

www.plesk.com Has IPv6

A (IPv4)	104.18.40.121 172.64.147.135
AAAA (IPv6)	2a06:98c1:3107::6812:2879 2a06:98c1:3105::ac40:9387

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: plesk.com
Measured 2026-10-31 02:03:01 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.18.40.121, 172.64.147.135
AAAA (IPv6): 2a06:98c1:3105::ac40:9387, 2a06:98c1:3107::6812:2879
www AAAA:    2a06:98c1:3107::6812:2879, 2a06:98c1:3105::ac40:9387

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: plesk.com has 2 IPv6 addresses and answers on every one we tested.
    2a06:98c1:3105::ac40:9387: answers (TCP 443)
    2a06:98c1:3107::6812:2879: answers (TCP 443)
- www over IPv6: www.plesk.com has 2 IPv6 addresses and answers on every one we tested.
    2a06:98c1:3107::6812:2879: answers (TCP 443)
    2a06:98c1:3105::ac40:9387: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server 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 1 redirect: HTTP 200.
    https://plesk.com/ via 2a06:98c1:3105::ac40:9387 -> HTTP 301, certificate: valid
    https://www.plesk.com/ via 2a06:98c1:3107::6812:2879 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/yed2thBZYC

Permanent link: aaaa.bot/r/yed2thBZYC · How we measure

Checked 2026-10-31 02:03:01 UTC. Full DNS report: dns.pizza/domain/plesk.com · JSON: /api/v1/plesk.com