tandicentrum.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 14 June 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.123 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by tandicentrum-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 our latest 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 |
|---|---|---|---|---|---|---|---|
| 185.21.41.123 | 3600s | prolinux6.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| 🔶 Autoconfig | tandicentrum.dk → 185.21.41.123 |
| TXT Record |
|---|
| v=DMARC1; p=none; rua=mailto:cbr@it-foqus.dk.site; ruf=mailto:cbr@it-foqus.dk; adkim=r; aspf=r; rf=afrf |
| v=spf1 include:_spf.mailersend.net include:spf.protection.outlook.com -all |
| Policy | Record (tandicentrum.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.mailersend.net include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.tandicentrum.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:cbr@it-foqus.dk.site; ruf=mailto:cbr@it-foqus.dk; adkim=r; aspf=r; rf=afrf |
| www CNAME | tandicentrum.dk (all on tandicentrum.dk) → 185.21.41.123 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.tandicentrum.dk | tandicentrum.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025091801 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2004-06-14 |
| Expires | 2032-06-30 (2082d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 06:58:11 shown | 1159ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 14:51:04 | 1280ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 06:48:58 | 950ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-19 13:04:45 | 931ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 05:35:38 | 1142ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 18:47:56 | 1318ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 21:00:02 | 3330ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 23:48:14 | 1869ms | 2 NS 1 A 1 MX | 🔒 Secure |