Yes — feedburner.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 feedburner.com has 4 IPv6 addresses and answers on every one we tested. ✓ 2607:f8b0:4004:c1f::8a answers · 443✓ 2607:f8b0:4004:c1f::71 answers · 443✓ 2607:f8b0:4004:c1f::8b answers · 443✓ 2607:f8b0:4004:c1f::65 answers · 443	yes
www over IPv6 www.feedburner.com has 4 IPv6 addresses and answers on every one we tested. ✓ 2607:f8b0:4004:c21::64 answers · 443✓ 2607:f8b0:4004:c21::71 answers · 443✓ 2607:f8b0:4004:c21::8a answers · 443✓ 2607:f8b0:4004:c21::65 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. ns4.google.com ✓ns1.google.com ✓ns3.google.com ✓ns2.google.com ✓	yes

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

https://feedburner.com/ via 2607:f8b0:4004:c1f::8a → 301https://feedburner.google.com/ via 2607:f8b0:4004:c2f::64 → 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/feedburner.com.svg)](https://aaaa.bot/feedburner.com)

Check again

feedburner.com Has IPv6

A (IPv4)	172.253.122.101 172.253.122.100 172.253.122.138 172.253.122.139 172.253.122.113 172.253.122.102
AAAA (IPv6)	2607:f8b0:4004:c1f::8a 2607:f8b0:4004:c1f::71 2607:f8b0:4004:c1f::8b 2607:f8b0:4004:c1f::65

www.feedburner.com Has IPv6

Alias of	www3.l.google.com
A (IPv4)	173.194.45.102 173.194.45.113 173.194.45.138 173.194.45.100 173.194.45.101 173.194.45.139
AAAA (IPv6)	2607:f8b0:4004:c21::64 2607:f8b0:4004:c21::71 2607:f8b0:4004:c21::8a 2607:f8b0:4004:c21::65

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: feedburner.com
Measured 2026-11-02 09:08:23 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    172.253.122.101, 172.253.122.100, 172.253.122.138, 172.253.122.139, 172.253.122.113, 172.253.122.102
AAAA (IPv6): 2607:f8b0:4004:c1f::8a, 2607:f8b0:4004:c1f::71, 2607:f8b0:4004:c1f::8b, 2607:f8b0:4004:c1f::65
www AAAA:    2607:f8b0:4004:c21::64, 2607:f8b0:4004:c21::71, 2607:f8b0:4004:c21::8a, 2607:f8b0:4004:c21::65

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: feedburner.com has 4 IPv6 addresses and answers on every one we tested.
    2607:f8b0:4004:c1f::8a: answers (TCP 443)
    2607:f8b0:4004:c1f::71: answers (TCP 443)
    2607:f8b0:4004:c1f::8b: answers (TCP 443)
    2607:f8b0:4004:c1f::65: answers (TCP 443)
- www over IPv6: www.feedburner.com has 4 IPv6 addresses and answers on every one we tested.
    2607:f8b0:4004:c21::64: answers (TCP 443)
    2607:f8b0:4004:c21::71: answers (TCP 443)
    2607:f8b0:4004:c21::8a: answers (TCP 443)
    2607:f8b0:4004:c21::65: 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 200.
    https://feedburner.com/ via 2607:f8b0:4004:c1f::8a -> HTTP 301, certificate: valid
    https://feedburner.google.com/ via 2607:f8b0:4004:c2f::64 -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/acHT14qQxL

Permanent link: aaaa.bot/r/acHT14qQxL · How we measure

Checked 2026-11-02 09:08:23 UTC. Full DNS report: dns.pizza/domain/feedburner.com · JSON: /api/v1/feedburner.com