tietgen.dk is a .dk domain served by 2 nameservers (lucy.ns.cloudflare.com, micah.ns.cloudflare.com). It was registered on 23 April 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by tietgen-dk.mail.protection.outlook.com. 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.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sip._tcp | 0 | 0 | 443 | sip.tietgen.dk |
| _sipfederationtls._tcp | 0 | 0 | 5061 | sip.tietgen.dk |
| TXT Record |
|---|
| adobe-idp-site-verification=f695554e09e7a020a9ce2256fa66d5703a85ba16063325d6c50fe8849454b882 |
| OmyfM8H2A8cIIKtt6pXZ/08s4z18EcmHc5ZZQ0Chqj7ypl1BlAY4eAEylsLKT8Wt1tBs60yK5VQfSgdLCivRCA== |
| uvmid=461415 |
| uWmVSJS6SocakNal6Edyd8iaN5ah7Eb9899tuEkP+7QU4dXKou0jEl9t/FCVH4MIVWohX8+Nkq96GDss37mpeQ== |
| v=spf1 mx include:spf.protection.outlook.com include:_spf.presscloud.com include:spf.mandrillapp.com -all |
| Policy | Record (tietgen.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx include:spf.protection.outlook.com include:_spf.presscloud.com include:spf.mandrillapp.com -all |
| Policy | Record (_dmarc.tietgen.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:174e743ad6d24954ace3245ec60d4190@dmarc-reports.cloudflare.net,mailto:dmarc_agg@vali.email; |
| www | 104.21.17.68 172.67.223.54 2606:4700:3033::6815:1144 2606:4700:3035::ac43:df36 (AS13335) (address records, no CNAME) |
| www vs bare domain | Only www resolves tietgen.dk: no address (all like this)www.tietgen.dk: 104.21.17.68 172.67.223.54 2606:4700:3033::6815:1144 2606:4700:3035::ac43:df36 (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-tietgen-dk._domainkey.tietgen365.onmicrosoft.com | RSA · ~1024 bit below 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: 4/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2407518655 |
| Primary NS (MNAME) | lucy.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1996-04-23 |
| Expires | 2027-06-30 (253d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 00:49:58 | 1237ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-15 20:23:58 | 1848ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-12 14:03:16 | 3090ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-08 10:54:26 | 1292ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-02 06:34:16 | 1043ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-01 06:30:24 | 1071ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-30 06:16:23 | 1537ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-29 06:06:20 | 1355ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-27 05:30:50 | 1380ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-26 05:20:03 | 1615ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-26 04:01:14 | 904ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-21 03:52:09 | 1289ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-07 04:41:38 | 1756ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-17 05:22:52 | 4681ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-11 18:13:34 | 9562ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-10 05:37:49 | 2205ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-07 14:42:57 | 2109ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-30 14:06:35 | 2038ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-18 04:43:23 | 4402ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-17 01:17:22 | 2355ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-27 12:55:06 shown | 2354ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-24 23:42:40 | 1297ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-22 15:50:53 | 1146ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 09:53:38 | 1111ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 18:29:12 | 879ms | 2 NS 0 A 1 MX | 🔒 Secure |