Yes — earthlink.net has IPv6.

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

This is a saved measurement from 2026-11-01 15:01 UTC. Check earthlink.net live now

IPv6 readiness

Works over IPv6, with one gap: its mail servers lack IPv6.

Website over IPv6 earthlink.net has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6813:efe4 answers · 443✓ 2606:4700::6812:d094 answers · 443	yes
www over IPv6 www.earthlink.net has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700::6812:d094 answers · 443✓ 2606:4700::6813:efe4 answers · 443	yes
Mail servers (MX) have IPv6 None of the mail servers has an AAAA record. mx01.earthlink-vadesecure.net ✗mx02.earthlink-vadesecure.net ✗mx03.earthlink-vadesecure.net ✗mx04.earthlink-vadesecure.net ✗	no
Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. carl.ns.cloudflare.com ✓rihana.ns.cloudflare.com ✓	yes

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

https://earthlink.net/ via 2606:4700::6813:efe4 → 403

works

What's keeping earthlink.net from an A

Mail servers without IPv6
mx01.earthlink-vadesecure.net, mx02.earthlink-vadesecure.net, mx03.earthlink-vadesecure.net, mx04.earthlink-vadesecure.net have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.

Check again

earthlink.net Has IPv6

A (IPv4)	104.19.239.228 104.18.208.148
AAAA (IPv6)	2606:4700::6813:efe4 2606:4700::6812:d094

www.earthlink.net Has IPv6

A (IPv4)	104.19.239.228 104.18.208.148
AAAA (IPv6)	2606:4700::6812:d094 2606:4700::6813:efe4

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: earthlink.net
Measured 2026-11-01 15:01:18 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    104.19.239.228, 104.18.208.148
AAAA (IPv6): 2606:4700::6813:efe4, 2606:4700::6812:d094
www AAAA:    2606:4700::6812:d094, 2606:4700::6813:efe4

Readiness grade B: Works over IPv6, with one gap: its mail servers lack IPv6.
- Website over IPv6: earthlink.net has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6813:efe4: answers (TCP 443)
    2606:4700::6812:d094: answers (TCP 443)
- www over IPv6: www.earthlink.net has 2 IPv6 addresses and answers on every one we tested.
    2606:4700::6812:d094: answers (TCP 443)
    2606:4700::6813:efe4: answers (TCP 443)
- Mail servers (MX) have IPv6: None of the mail servers 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: HTTP 403.
    https://earthlink.net/ via 2606:4700::6813:efe4 -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/7UT-l9qa4k

Permanent link: aaaa.bot/r/7UT-l9qa4k · How we measure

Checked 2026-11-01 15:01:18 UTC. Full DNS report: dns.pizza/domain/earthlink.net · JSON: /api/v1/earthlink.net