tandrup.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 21 March 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.56.144.4 is hosted by GlobalConnect A/S (AS31027) in Denmark. Mail is handled by tandrup-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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 5.56.144.4 | 3600s | plesk2.fkly.dk | AS31027 | GlobalConnect A/S | 5.56.144.0/20 | 🇩🇰 Denmark | Brøndby |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| 🔶 Autoconfig | 5.56.144.4 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 ip4:194.239.212.186 ip4:194.126.250.189 include:spf.protection.outlook.com include:eu.zcsend.net -all |
| Policy | Record (tandrup.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:194.239.212.186 ip4:194.126.250.189 include:spf.protection.outlook.com include:eu.zcsend.net -all |
| Policy | Record (_dmarc.tandrup.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:dmarc@tandrup.uriports.com; ruf=mailto:dmarc@tandrup.uriports.com; fo=1:d:s |
| Check | Result |
|---|---|
| Status | 🧪 Testing |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | testing |
| Policy ID | 20230525121321Z |
| max_age | 86400s |
| Policy MX | *.mail.protection.outlook.com |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:tlsrpt@tandrup.uriports.com |
| www | 5.56.144.4 (AS31027) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-tandrup-dk._domainkey.tandrupdk.onmicrosoft.com | 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: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100100 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 1997-03-21 |
| Expires | 2027-03-31 (165d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 13:44:05 | 2918ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 10:36:45 | 1390ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 00:28:07 shown | 3065ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 00:10:36 | 983ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 03:07:15 | 1286ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 16:30:03 | 1983ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 09:02:32 | 2379ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 07:02:05 | 1178ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 08:29:36 | 1052ms | 4 NS 1 A 1 MX | 🔒 Secure |