a773.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 3 July 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 83.93.185.27 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mail.tutanota.de. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 83.93.185.27 | 600s | 83-93-185-27-dynamic.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 83.93.176.0/20 | 🇩🇰 Denmark | Valby |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 600s | mail.tutanota.de | 185.205.69.211 185.205.69.213 185.205.69.214 |
mail.w11.tutanota.de mail.w13.tutanota.de mail.w14.tutanota.de |
AS210909 Tutao GmbH AS210909 Tutao GmbH AS210909 Tutao GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 83.93.185.27 |
| 🔶 Autoconfig | 83.93.185.27 |
| TXT Record |
|---|
| t-verify=3496692a7852f3bbb78daedd1753048d |
| v=spf1 include:spf.tutanota.de -all |
| Policy | Record (a773.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.tutanota.de -all |
| Policy | Record (_dmarc.a773.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; adkim=s |
| Check | Result |
|---|---|
| Status | ⚠️ Invalid |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✗ Missing / invalid |
| Policy ID | 20190723 |
| Policy MX | — |
| www | 46.30.211.38 (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.tutanota.de | RSA · ~2048 bit |
| s2 | s2.domainkey.tutanota.de | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.tutanota.de | DANE-EE · SPKI · SHA-256 | 5AE0D6DC8A713441003F578C5A1D4D70… |
| SMTP _25._tcp.mail.tutanota.de | DANE-EE · Full cert · SHA-256 | D141F8F3A4AAC2E4D2677AAFCC723D8E… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026091314 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-07-03 |
| Expires | 2027-07-31 (287d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 04:50:53 | 557ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 05:39:11 | 738ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 20:10:14 | 1058ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-18 09:42:03 shown | 1022ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-07 00:35:32 | 1107ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-20 14:37:14 | 1851ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-18 13:32:46 | 3179ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-14 05:40:32 | 4703ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-21 21:22:09 | 536ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-16 12:14:50 | 594ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-03 20:04:42 | 578ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 02:45:40 | 2386ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 21:12:04 | 1150ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 08:43:20 | 456ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 12:46:32 | 463ms | 2 NS 1 A 0 MX | 🔒 Secure |