Has both IPv4 (A) and IPv6 (AAAA) addresses.
| Website over IPv6 medicalalertsystemsboston.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::6815:b6a answers · 443✓ 2606:4700:3033::ac43:94c5 answers · 443 | yes |
| www over IPv6 www.medicalalertsystemsboston.com has 2 IPv6 addresses and answers on every one we tested. ✓ 2606:4700:3037::6815:b6a answers · 443✓ 2606:4700:3033::ac43:94c5 answers · 443 | yes |
| Mail servers (MX) have IPv6 No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record. | yes |
| Nameservers have IPv6 2 of 2 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up. jake.ns.cloudflare.com ✓nancy.ns.cloudflare.com ✓ | yes |
| HTTPS over IPv6 · not part of the grade yet Loads over IPv6 with a valid certificate after 1 redirect: HTTP 200. https://medicalalertsystemsboston.com/ via 2606:4700:3037::6815:b6a → 301https://www.medicalalertsystemsboston.com/ via 2606:4700:3037::6815:b6a → 200 | works |
medicalalertsystemsboston.com Has IPv6
| A (IPv4) | 172.67.148.197 104.21.11.106 |
|---|---|
| AAAA (IPv6) | 2606:4700:3037::6815:b6a 2606:4700:3033::ac43:94c5 |
www.medicalalertsystemsboston.com Has IPv6
| A (IPv4) | 172.67.148.197 104.21.11.106 |
|---|---|
| AAAA (IPv6) | 2606:4700:3037::6815:b6a 2606:4700:3033::ac43:94c5 |
Browsers on dual-stack networks will usually pick IPv6 here (the "Happy Eyeballs" algorithm races both and prefers v6).
Permanent link: aaaa.bot/r/gMtPYt2zq- · How we measure
Checked 2026-11-15 09:34:21 UTC. Full DNS report: dns.pizza/domain/medicalalertsystemsboston.com · Age, certificate and blocklists: how.is/medicalalertsystemsboston.com · JSON: /api/v1/medicalalertsystemsboston.com