Yes — flydelta.online has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 flydelta.online has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:ad90:d8db:fffe:7510:53c5 answers · 443✓ 2a02:4780:84:101c:907b:94e7:1ea4:1bd8 answers · 443	yes
www over IPv6 www.flydelta.online has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:4780:84:2f9:3241:948d:395c:4f92 answers · 443✓ 2a02:4780:84:7d0f:4bd7:b6a8:e16d:c7b6 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. cosmos.dns-parking.com ✓nova.dns-parking.com ✓	yes

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

https://flydelta.online/ via 2a02:4780:84:ad90:d8db:fffe:7510:53c5 → 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/flydelta.online.svg)](https://aaaa.bot/flydelta.online)

Check again

flydelta.online Has IPv6

A (IPv4)	2.57.91.217 88.222.222.160
AAAA (IPv6)	2a02:4780:84:ad90:d8db:fffe:7510:53c5 2a02:4780:84:101c:907b:94e7:1ea4:1bd8

www.flydelta.online Has IPv6

Alias of	www.flydelta.online.cdn.hstgr.net
A (IPv4)	145.223.124.25 147.79.79.112
AAAA (IPv6)	2a02:4780:84:2f9:3241:948d:395c:4f92 2a02:4780:84:7d0f:4bd7:b6a8:e16d:c7b6

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: flydelta.online
Measured 2026-11-10 23:47:15 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    2.57.91.217, 88.222.222.160
AAAA (IPv6): 2a02:4780:84:ad90:d8db:fffe:7510:53c5, 2a02:4780:84:101c:907b:94e7:1ea4:1bd8
www AAAA:    2a02:4780:84:2f9:3241:948d:395c:4f92, 2a02:4780:84:7d0f:4bd7:b6a8:e16d:c7b6

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: flydelta.online has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:ad90:d8db:fffe:7510:53c5: answers (TCP 443)
    2a02:4780:84:101c:907b:94e7:1ea4:1bd8: answers (TCP 443)
- www over IPv6: www.flydelta.online has 2 IPv6 addresses and answers on every one we tested.
    2a02:4780:84:2f9:3241:948d:395c:4f92: answers (TCP 443)
    2a02:4780:84:7d0f:4bd7:b6a8:e16d:c7b6: 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: HTTP 200.
    https://flydelta.online/ via 2a02:4780:84:ad90:d8db:fffe:7510:53c5 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/c-_m8QpC3D

Permanent link: aaaa.bot/r/c-_m8QpC3D · How we measure

Checked 2026-11-10 23:47:15 UTC. Full DNS report: dns.pizza/domain/flydelta.online · Age, certificate and blocklists: how.is/flydelta.online · JSON: /api/v1/flydelta.online