IPv6
Measured 2026-11-01 14:56 UTC · aaaa.botThe website has no IPv6.
hhs.gov has no IPv6 address published.
- ✗ hhs.gov: no IPv6 address
- ✓ www.hhs.gov answers (2 of 2)
- ✓ Mail: 1 of 1 servers have IPv6
- ✓ Nameservers: 4 of 4 have IPv6
Details: published addresses and what answered
| Name | Published address (AAAA) | Answers when we connect |
|---|---|---|
| hhs.gov | Publishedno IPv6 address published | Answers when we connectnothing to test |
| www.hhs.gov | Published2600:1408:c400:1888::219c2600:1408:c400:1884::219c | Answers when we connect✓ answers on 443✓ answers on 443 |
Publishedhhs-gov.mail.protection.outlook.com | Answers when we connect✓ has IPv6 | |
| Nameservers | Publishedns1-08.azure-dns.comns2-08.azure-dns.netns3-08.azure-dns.orgns4-08.azure-dns.info | Answers when we connect✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6 |
Lineage
Our records: Dec 5, 2023 → Nov 1, 2026Oldest registry snapshot we hold: 2023 · 2 renewals on record. These dates are when our records begin, not when the domain was registered.
What changed
- IPv6 first measured: no IPv6 published on Nov 1, 2026hhs.gov: no IPv6 published. Grade D. Measured by aaaa.bot, 2026-11-01 14:56 UTC. No earlier IPv6 record is held, so this is not a "gained" date.
- DNS moved to Microsoft Azure DNS between Aug 12, 2025 and Sep 18, 2025a.hhs.gov, b.hhs.gov → ns1-08.azure-dns.com, ns2-08.azure-dns.net, ns3-08.azure-dns.org, ns4-08.azure-dns.info. Old set last seen in WHOIS on 2025-08-12; new set first seen in WHOIS on 2025-09-18.
- Renewed +1 year between Jul 5, 2025 and Aug 12, 2025Expiry moved from 2025-09-22 to 2026-07-24, at get.gov.
- DNS moved to hhs.gov between May 26, 2025 and Jul 5, 2025rh120ns1.368.dhhs.gov, rh120ns2.368.dhhs.gov, rh202ns1.355.dhhs.gov, rh202ns2.355.dhhs.gov → a.hhs.gov, b.hhs.gov. Old set last seen in WHOIS on 2025-05-26; new set first seen in WHOIS on 2025-07-05.
- Renewed +1 year between Dec 5, 2023 and Jan 5, 2024Expiry moved from 2024-09-22 to 2025-09-22, at Cybersecurity and Infrastructure Security Agency.
Registrar and renewals: 44 WHOIS/RDAP snapshots, 2023-12-05 to 2026-05-12 (ledger built 2026-09-27). Every renewal
Nameservers, WHOIS snapshots: 39 WHOIS/RDAP snapshots that listed nameservers, 2023-12-05 to 2026-06-14 (who.is archive). A change is placed between the nearest observations on either side, from whichever source made them; where the two sources disagree, both are shown.
Hatched = the span we hold records for. A coloured bar runs only between observations that named the same registrar or operator; nothing is assumed in between.
Each mark sits at the first observation of the new state; its bracket runs back to the last observation of the old one.
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