guldbergsgade11.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 3 March 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 103.169.142.0 is hosted by Cloudflare London, LLC (AS209242) in Australia. Mail is handled by mx.simply.com. The zone is DNSSEC-signed but currently fails validation, 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 |
|---|---|---|---|---|---|---|---|
| 103.169.142.0 | 600s | — | AS209242 | Cloudflare London, LLC | 103.169.142.0/24 | 🇦🇺 Australia | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 94.231.109.94 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| canva-domain-verify=96e0ff37-9060-441d-9428-3cb85b647ff0 |
| Policy | Record (_dmarc.guldbergsgade11.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www | 103.169.142.0 (AS209242) (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 |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| Check | Result |
|---|---|
| Validation Status | ⚠️ Bogus |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | broken trust chain resolving 'guldbergsgade11.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2025040603 |
| 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 | 2025-03-03 |
| Expires | 2027-03-02 (129d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 14:20:15 | 888ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 13:14:55 | 724ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 02:44:37 | 928ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-04 12:37:21 | 2980ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 23:08:35 shown | 469ms | 3 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-17 10:02:16 | 4572ms | 3 NS 1 A 1 MX | 🔒 Secure |