| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 91.221.196.222 | 43200s | — | AS51468 | One.com A/S | 91.221.196.0/23 | 🇩🇰 Denmark | Copenhagen |
| TXT Record |
|---|
| protonmail-verification=2612141af45a2f76a9d5ad2346bd2561a3afce6e |
| v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (helvedespisugler.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch mx ~all |
| Policy | Record (_dmarc.helvedespisugler.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC | |
|---|---|---|---|---|
| 2026-08-27 22:18:46 | 867ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-08-27 05:22:18 | 660ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-08-25 04:03:54 | 629ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-08-12 01:48:42 | 9050ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-07-18 15:19:14 | 3170ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-07-13 21:15:37 | 4836ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-06-24 22:02:28 | 489ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-06-24 08:24:57 | 1162ms | 0 NS 0 A 0 MX | ❓ Unknown | View |
| 2026-06-17 11:19:52 | 780ms | 2 NS 1 A 2 MX | 🔒 Secure | View |
| 2026-06-17 11:13:07 | 802ms | 2 NS 1 A 2 MX | 🔒 Secure | View |