Yes — pubmatic.com has IPv6.

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

IPv6 readiness

Website, mail and DNS all work over IPv6.

Website over IPv6 pubmatic.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested). ✓ 2600:9000:24f5:8c00:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:3800:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:4200:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:d400:1a:89bc:d200:93a1 answers · 443– 2600:9000:24f5:f800:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:9400:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:ba00:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:4a00:1a:89bc:d200:93a1 not tested	yes
www over IPv6 www.pubmatic.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested). ✓ 2600:9000:24f5:f800:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:7000:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:1200:1a:89bc:d200:93a1 answers · 443✓ 2600:9000:24f5:2800:1a:89bc:d200:93a1 answers · 443– 2600:9000:24f5:a000:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:f400:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:8c00:1a:89bc:d200:93a1 not tested– 2600:9000:24f5:4400:1a:89bc:d200:93a1 not tested	yes
Mail servers (MX) have IPv6 Every mail server has an AAAA record. pubmatic-com.mail.protection.outlook.com ✓	yes
Nameservers have IPv6 4 of 4 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. dns1.p01.nsone.net ✓dns2.p01.nsone.net ✓dns3.p01.nsone.net ✓dns4.p01.nsone.net ✓	yes

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

https://pubmatic.com/ via 2600:9000:24f5:8c00:1a:89bc:d200:93a1 → 403

works

Nothing keeping you from an A

Nothing to fix
Show it off: add the badge to your README.
[![IPv6](https://aaaa.bot/badge/pubmatic.com.svg)](https://aaaa.bot/pubmatic.com)

Check again

pubmatic.com Has IPv6

A (IPv4)	18.165.98.77 18.165.98.111 18.165.98.36 18.165.98.27
AAAA (IPv6)	2600:9000:24f5:8c00:1a:89bc:d200:93a1 2600:9000:24f5:3800:1a:89bc:d200:93a1 2600:9000:24f5:4200:1a:89bc:d200:93a1 2600:9000:24f5:d400:1a:89bc:d200:93a1 2600:9000:24f5:f800:1a:89bc:d200:93a1 2600:9000:24f5:9400:1a:89bc:d200:93a1 2600:9000:24f5:ba00:1a:89bc:d200:93a1 2600:9000:24f5:4a00:1a:89bc:d200:93a1

www.pubmatic.com Has IPv6

Alias of	pubmatic.com
A (IPv4)	18.165.98.77 18.165.98.27 18.165.98.111 18.165.98.36
AAAA (IPv6)	2600:9000:24f5:f800:1a:89bc:d200:93a1 2600:9000:24f5:7000:1a:89bc:d200:93a1 2600:9000:24f5:1200:1a:89bc:d200:93a1 2600:9000:24f5:2800:1a:89bc:d200:93a1 2600:9000:24f5:a000:1a:89bc:d200:93a1 2600:9000:24f5:f400:1a:89bc:d200:93a1 2600:9000:24f5:8c00:1a:89bc:d200:93a1 2600:9000:24f5:4400:1a:89bc:d200:93a1

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: pubmatic.com
Measured 2026-10-31 01:04:20 UTC by aaaa.bot (one server on Fly.io, region iad)

A (IPv4):    18.165.98.77, 18.165.98.111, 18.165.98.36, 18.165.98.27
AAAA (IPv6): 2600:9000:24f5:8c00:1a:89bc:d200:93a1, 2600:9000:24f5:3800:1a:89bc:d200:93a1, 2600:9000:24f5:4200:1a:89bc:d200:93a1, 2600:9000:24f5:d400:1a:89bc:d200:93a1, 2600:9000:24f5:f800:1a:89bc:d200:93a1, 2600:9000:24f5:9400:1a:89bc:d200:93a1, 2600:9000:24f5:ba00:1a:89bc:d200:93a1, 2600:9000:24f5:4a00:1a:89bc:d200:93a1
www AAAA:    2600:9000:24f5:f800:1a:89bc:d200:93a1, 2600:9000:24f5:7000:1a:89bc:d200:93a1, 2600:9000:24f5:1200:1a:89bc:d200:93a1, 2600:9000:24f5:2800:1a:89bc:d200:93a1, 2600:9000:24f5:a000:1a:89bc:d200:93a1, 2600:9000:24f5:f400:1a:89bc:d200:93a1, 2600:9000:24f5:8c00:1a:89bc:d200:93a1, 2600:9000:24f5:4400:1a:89bc:d200:93a1

Readiness grade A: Website, mail and DNS all work over IPv6.
- Website over IPv6: pubmatic.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
    2600:9000:24f5:8c00:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:3800:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:4200:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:d400:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:f800:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:9400:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:ba00:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:4a00:1a:89bc:d200:93a1: not tested
- www over IPv6: www.pubmatic.com has 4 IPv6 addresses and answers on every one we tested (4 more not tested).
    2600:9000:24f5:f800:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:7000:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:1200:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:2800:1a:89bc:d200:93a1: answers (TCP 443)
    2600:9000:24f5:a000:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:f400:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:8c00:1a:89bc:d200:93a1: not tested
    2600:9000:24f5:4400:1a:89bc:d200:93a1: not tested
- 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: HTTP 403.
    https://pubmatic.com/ via 2600:9000:24f5:8c00:1a:89bc:d200:93a1 -> HTTP 403, certificate: valid
DNS answers via DNS-over-HTTPS (Cloudflare). Method: https://aaaa.bot/method
Permanent link: https://aaaa.bot/r/upenbnAWwT

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

Checked 2026-10-31 01:04:20 UTC. Full DNS report: dns.pizza/domain/pubmatic.com · JSON: /api/v1/pubmatic.com