Has an IPv4 address but no IPv6 (AAAA) record. IPv6-only visitors can't reach it directly.
| Website over IPv6 email.byu.edu has no AAAA record. | no |
| Mail servers (MX) have IPv6 Every mail server has an AAAA record. email-byu-edu.mail.protection.outlook.com ✓ | yes |
| Nameservers have IPv6 2 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. edns1.byu.edu ✓edns3.byu.edu ✗edns2.byu.edu ✓ | yes |
email.byu.edu IPv4 only
| A (IPv4) | 128.187.16.184 |
|---|---|
| AAAA (IPv6) | none |
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
Permanent link: aaaa.bot/r/pDCk7WpHpY · How we measure
Checked 2026-11-04 01:58:07 UTC. Full DNS report: dns.pizza/domain/email.byu.edu · Age, certificate and blocklists: how.is/email.byu.edu · JSON: /api/v1/email.byu.edu