guldborgsund.dk

📜 Historical scan 2026-08-27 14:37:30 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

guldborgsund.dk is a .dk domain served by 2 nameservers (adi.ns.cloudflare.com, mark.ns.cloudflare.com). It was registered on 2 September 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.197.250.177 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by guldborgsund-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.

🖥️ Nameservers#

2 records 31ms

Nameserver	IP addresses	PTR	ASN / ISP
adi.ns.cloudflare.com	108.162.192.56 172.64.32.56 173.245.58.56 2606:4700:50::adf5:3a38 2803:f800:50::6ca2:c038 2a06:98c1:50::ac40:2038	adi.ns.cloudflare.com adi.ns.cloudflare.com adi.ns.cloudflare.com adi.ns.cloudflare.com adi.ns.cloudflare.com adi.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
mark.ns.cloudflare.com	108.162.193.130 172.64.33.130 173.245.59.130 2606:4700:58::adf5:3b82 2803:f800:50::6ca2:c182 2a06:98c1:50::ac40:2182	mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

1 records 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.197.250.177	300s	lb1.corp.cabana.dk	AS48854	team.blue Denmark A/S	91.197.248.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 25ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	guldborgsund-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::6 2a01:111:f403:ca09::8 2a01:111:f403:ca48::8 52.101.73.24 52.101.73.30 52.101.73.4 52.101.73.6	mail-db4pr02cu00204.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com mail-am0pr83cu00404.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 214ms

TXT Record
CywcDKmAPfr8XvidAwDAa9HH40lFJRt3OMdTxu6JX45+BXggJngA1IsW8g6YBz2r0l4R2AjqcBuXm85j+hX4xQ==
v=spf1 include:uxmail.io include:spf.mailjet.com include:o._spf.bellcom.dk include:spf.protection.outlook.com include:spf.topdesk.net include:speedadmin.dk ip4:195.215.234.1 ip4:195.215.235.28 ip4:185.158.61.193 -all

✉️ SPF#

Policy	Record (guldborgsund.dk)
-all (hard fail)	v=spf1 include:uxmail.io include:spf.mailjet.com include:o._spf.bellcom.dk include:spf.protection.outlook.com include:spf.topdesk.net include:speedadmin.dk ip4:195.215.234.1 ip4:195.215.235.28 ip4:185.158.61.193 -all

📨 DMARC#

Policy	Record (_dmarc.guldborgsund.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:641c60a4cd204@dmarc.centerasecurity.com,mailto:1e9e1dffe3df416e94c6f2fc5d8fdce7@dmarc-reports.cloudflare.net

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-15 23:14:18

www CNAME	guldborgsund.dk (all on guldborgsund.dk) → 91.197.250.177 (AS48854)
www vs bare domain	Same network guldborgsund.dk: 91.197.250.177 (AS48854) www.guldborgsund.dk: 91.197.250.177 (AS48854)
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

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-guldborgsund-dk._domainkey.guldborgsund.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-guldborgsund-dk._domainkey.guldborgsund.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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.guldborgsund.dk	_acme-challenge.9ac01310829aae848a5b299bb9e38ac9fdd3e0d949697c77.upcloudlb.com

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

98ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2413234511
Primary NS (MNAME)	adi.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-07 02:59:03

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2003-09-02
Expires	2027-09-30 (343d)

📋 WHOIS#

⏱️ Lookup Timing#

31ms

28ms

25ms

AAAA

21ms

TXT

214ms

CAA

27ms

HTTPS

24ms

TLSA

603ms

SOA

0ms

MTA-STS

47ms

DNSSEC

98ms

SRV

47ms

Total

1209ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 23:14:18	1488ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-13 19:34:22	3023ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-13 18:56:11	2532ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-27 03:17:43	1136ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-26 03:14:05	902ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-23 12:18:41	1012ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-19 05:16:53	1042ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-15 06:42:22	1924ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-08 04:33:51	1121ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 14:37:30 shown	1209ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-02 23:54:20	4002ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-11 04:50:26	9424ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-09 02:49:18	9995ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-26 02:46:28	2993ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 11:32:03	8215ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 10:47:17	905ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 10:43:05	3200ms	2 NS 1 A 1 MX	🔒 Secure