IPv6
Measured 2026-11-15 17:08 UTC · aaaa.botWorks over IPv6, with one gap: its mail servers lack IPv6.
cancer.gov has an AAAA record and answers on it.
- ✓ cancer.gov answers (1 of 1 addresses)
- ✓ www.cancer.gov answers (2 of 2)
- ✗ Mail: 8 of 10 servers have IPv6
- ✓ Nameservers: 3 of 3 have IPv6
Details: published addresses and what answered
Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200.
| Name | Published address (AAAA) | Answers when we connect |
|---|---|---|
| cancer.gov | Published2607:f220:41d:21c1::812b:fe27 | Answers when we connect✓ answers on 443 |
| www.cancer.gov | Published2600:1408:5400:35::17ca:e6c82600:1408:5400:35::17ca:e6e0 | Answers when we connect✓ answers on 443✓ answers on 443 |
Publishednihcesxway.hub.nih.govnihcesxway2.hub.nih.govnihcesxway3.hub.nih.govnihcesxway4.hub.nih.govnihcesxway5.hub.nih.govnihcesxwayst01.hub.nih.govnihcesxwayst02.hub.nih.govnihcesxwayst03.hub.nih.govnihcesxwayst04.hub.nih.govnihcesxwayst05.hub.nih.gov | Answers when we connect✗ no IPv6✗ no IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6✓ has IPv6 | |
| Nameservers | Publishedns.nih.govns2.nih.govns3.nih.gov | Answers when we connect✓ has IPv6✓ has IPv6✓ has IPv6 |
See where it lives on the IPv4 map →
Lineage
Our records: Nov 23, 2023 → Nov 15, 2026Oldest registry snapshot we hold: 2023 · 2 renewals on record. These dates are when our records begin, not when the domain was registered.
Registrar
- Cybersecurity and Infrastructure Security AgencyDec 2023 – Jan 2024
- get.govlast seen Sep 2025Aug – Sep 2025
DNS provider
- nih.govNov 2023 – Jun 2026
IPv6
- IPv6published, and answeringFirst measured Nov 2026
What changed
- IPv6 first measured: published, and answering on Nov 6, 2026cancer.gov has 1 IPv6 address. Grade B. Measured by aaaa.bot, 2026-11-06 15:28 UTC. No earlier IPv6 record is held, so this is not a "gained" date.
- Renewed +1 year between Aug 30, 2025 and Sep 17, 2025Expiry moved from 2025-09-22 to 2026-09-15, at get.gov.
- Renewed +1 year between Dec 1, 2023 and Jan 6, 2024Expiry moved from 2024-09-22 to 2025-09-22, at Cybersecurity and Infrastructure Security Agency.
Solid bar: the stretch we observed that name. Dot: a single sighting. Dotted line: no record between sightings of the same name. Nothing is drawn between different names.
Registrar and renewals: 52 WHOIS/RDAP snapshots, 2023-11-23 to 2026-05-13 (ledger built 2026-09-27). Every renewal
DNS provider, WHOIS snapshots: 44 WHOIS/RDAP snapshots that listed nameservers, 2023-11-23 to 2026-06-21 (who.is archive). Both sources feed one row per provider (hover a bar to see which); a change is placed between the nearest observations on either side, and where the two sources disagree, both are listed under What changed.
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Registered in 1999 — the same year as akamai.net, office.com and akadns.net.