No — illinois.gov is IPv4 only.

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

Measured 2026-11-02 19:42 UTC. We reuse a result for up to a week, so we aren't testing the same site over and over. Check illinois.gov now

D
IPv6 readiness
The website has no IPv6.
Website over IPv6
illinois.gov has no AAAA record.		no
www over IPv6
www.illinois.gov has 2 IPv6 addresses and answers on every one we tested.
✓ 2600:1408:ec00:b::1730:cbb6 answers · 443✓ 2600:1408:ec00:b::1730:cba6 answers · 443
yes
Mail servers (MX) have IPv6
None of the mail servers has an AAAA record.
smtpin07.illinois.gov ✗smtpin06.illinois.gov ✗smtpin02.illinois.gov ✗smtpin01.illinois.gov ✗
no
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
ns2.state.il.us ✗ns1.state.il.us ✗
no

First measured 2026-11-02; last confirmed 2026-11-02.

What's keeping illinois.gov from an A

  1. Give illinois.gov 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. Mail servers without IPv6
    smtpin07.illinois.gov, smtpin06.illinois.gov, smtpin02.illinois.gov, smtpin01.illinois.gov have no AAAA record, so mail from IPv6-only servers can't reach them directly. If a provider runs your mail, that's their setting; if you run it, add AAAA records for these hosts.
  3. Nameservers without IPv6
    ns2.state.il.us, ns1.state.il.us 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

illinois.gov  IPv4 only

A (IPv4)216.124.54.81
AAAA (IPv6)none

www.illinois.gov  Has IPv6

Alias ofwww.illinois.gov.edgekey.net → e86023.dscb.akamaiedge.net
A (IPv4)23.48.203.166
23.48.203.182
AAAA (IPv6)2600:1408:ec00:b::1730:cbb6
2600:1408:ec00:b::1730:cba6

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

Copy the evidence — a citation-ready record of this measurement

 Permanent link: aaaa.bot/r/4QMlykb9Wu · How we measure

Checked 2026-11-02 19:42:03 UTC. Full DNS report: dns.pizza/domain/illinois.gov · Age, certificate and blocklists: how.is/illinois.gov · JSON: /api/v1/illinois.gov