No — x.com is IPv4 only.

Has an IPv4 address but no IPv6 (AAAA) record. IPv6-only visitors can't reach it directly.

D
IPv6 readiness
The website has no IPv6.
Website over IPv6
x.com has no AAAA record.		no
www over IPv6
www.x.com has no AAAA record.		no
Mail servers (MX) have IPv6
Every mail server has an AAAA record.
aspmx.l.google.com ✓alt3.aspmx.l.google.com ✓alt4.aspmx.l.google.com ✓alt1.aspmx.l.google.com ✓alt2.aspmx.l.google.com ✓
yes
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
a.r10.twtrdns.net ✗a.u10.twtrdns.net ✗b.r10.twtrdns.net ✗b.u10.twtrdns.net ✗c.r10.twtrdns.net ✗c.u10.twtrdns.net ✗d.r10.twtrdns.net ✗d.u10.twtrdns.net ✗
no

What's keeping x.com from an A

  1. Give x.com an IPv6 address
    Ask your hosting provider for the site's IPv6 address (or the hostname to point at), then publish it as an AAAA record. If your host doesn't offer IPv6, a proxy that does can sit in front. How to add an AAAA record
  2. www.x.com is an alias of x.com, which has no IPv6
    www.x.com is a CNAME, so it can't also have its own AAAA record. Ask whoever runs x.com to enable IPv6 there — or replace the alias with the A and AAAA records they give you. Why some hosts don't offer IPv6
  3. Nameservers without IPv6
    a.r10.twtrdns.net, a.u10.twtrdns.net, b.r10.twtrdns.net, b.u10.twtrdns.net, c.r10.twtrdns.net, c.u10.twtrdns.net, d.r10.twtrdns.net, d.u10.twtrdns.net all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

x.com  IPv4 only

A (IPv4)172.66.0.227
AAAA (IPv6)none

www.x.com  IPv4 only

Alias ofx.com
A (IPv4)172.66.0.227
AAAA (IPv6)none

What this means

Visitors on IPv6-only networks (many mobile carriers) can still reach it, but only through a translator their carrier runs (NAT64). The site itself has no IPv6 address — and you can't make one up from the IPv4. Why some hosts don't offer it

Checked 2026-10-30 14:52:00 UTC — one of the top 1,000 sites, re-checked weekly. Re-check now. Full DNS report: dns.pizza/domain/x.com · JSON: /api/v1/x.com