Yes — proofpoint.com has IPv6.

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

This is a saved measurement from 2026-11-01 16:52 UTC. Check proofpoint.com live now

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 proofpoint.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2a02:e980:e6::cf answers · 443✓ 2a02:e980:13e::cf answers · 443	yes
www over IPv6 www.proofpoint.com has an AAAA record and answers on it. ✓ 2a02:e980:e6::cf answers · 443	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. mxa-00148501.gslb.pphosted.com ✓mxb-00148501.gslb.pphosted.com ✓mx0a-00148501.pphosted.com ✓mx0b-00148501.pphosted.com ✓	yes
Nameservers have IPv6 6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. ns1.proofpoint.com ✓ns3.proofpoint.com ✓pdns99.ultradns.biz ✓pdns99.ultradns.com ✓pdns99.ultradns.net ✓pdns99.ultradns.org ✓	yes

HTTPS over IPv6 · not part of the grade yet
Loads over IPv6 with a valid certificate after 2 redirects: HTTP 200.

https://proofpoint.com/ via 2a02:e980:e6::cf → 301https://www.proofpoint.com/ via 2a02:e980:e6::cf → 301https://www.proofpoint.com/us via 2a02:e980:e6::cf → 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/proofpoint.com.svg)](https://aaaa.bot/proofpoint.com)

Check again

proofpoint.com Has IPv6

A (IPv4)	45.60.151.207 45.60.171.207
AAAA (IPv6)	2a02:e980:e6::cf 2a02:e980:13e::cf

www.proofpoint.com Has IPv6

Alias of	r49ke.x.incapdns.net
A (IPv4)	45.60.151.207
AAAA (IPv6)	2a02:e980:e6::cf

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: proofpoint.com
Measured 2026-11-01 16:52:18 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    45.60.151.207, 45.60.171.207
AAAA (IPv6): 2a02:e980:e6::cf, 2a02:e980:13e::cf
www AAAA:    2a02:e980:e6::cf

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: proofpoint.com has 2 IPv6 addresses and answers on every one we tested.
    2a02:e980:e6::cf: answers (TCP 443)
    2a02:e980:13e::cf: answers (TCP 443)
- www over IPv6: www.proofpoint.com has an AAAA record and answers on it.
    2a02:e980:e6::cf: answers (TCP 443)
- Mail servers (MX) have IPv6: Every mail server has an AAAA record.
- Nameservers have IPv6: 6 of 6 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 2 redirects: HTTP 200.
    https://proofpoint.com/ via 2a02:e980:e6::cf -> HTTP 301, certificate: valid
    https://www.proofpoint.com/ via 2a02:e980:e6::cf -> HTTP 301, certificate: valid
    https://www.proofpoint.com/us via 2a02:e980:e6::cf -> HTTP 200, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/QlqaD2vw_m

Permanent link: aaaa.bot/r/QlqaD2vw_m · How we measure

Checked 2026-11-01 16:52:18 UTC. Full DNS report: dns.pizza/domain/proofpoint.com · JSON: /api/v1/proofpoint.com