bykronborg.dk

📜 Historical scan 2026-06-25 13:28:13 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

bykronborg.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 21 October 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.104.202.80 is hosted by It Forum Gruppen A/s (AS50346) in Denmark. Mail is handled by bykronborg-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#

3 records 52ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.104.202.80	3600s	mbx.itsecurity.dk	AS50346	It Forum Gruppen A/s	193.104.202.0/24	🇩🇰 Denmark	Virum

📧 MX Records#

1 records 48ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	bykronborg-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::6 2a01:111:f403:ca04::a 2a01:111:f403:ca09::e 52.101.68.21 52.101.68.27 52.101.73.19 52.101.73.6	mail-du2pr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-as8pr04cu00803.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 → 52.97.218.72

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 258ms

TXT Record
MS=ms27971168
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (bykronborg.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.bykronborg.dk)
p=reject	v=DMARC1; p=reject

📬 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 2026-10-13 13:56:54

www	193.104.202.80 (AS50346) (address records, no CNAME)
www vs bare domain	Same network bykronborg.dk: 193.104.202.80 (AS50346) www.bykronborg.dk: 193.104.202.80 (AS50346)
Wildcard	No
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

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

71ms

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

🏷️ SOA#

69ms

Field	Value
Serial	2024052301
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-13 14:16:33

Field	Value
Registrar	Simply.com A/S
Registered	2022-10-21
Expires	2027-10-20 (367d)

🔗 Same registrant#

1 domain

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).

Domain	Registrar
fdrk.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

52ms

30ms

48ms

AAAA

42ms

TXT

258ms

CAA

70ms

HTTPS

37ms

TLSA

154ms

SOA

69ms

MTA-STS

47ms

DNSSEC

71ms

SRV

111ms

Total

894ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 13:56:54	991ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-02 19:46:24	1002ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-02 05:13:34	1302ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-30 19:19:41	686ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-25 13:28:13 shown	894ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-21 12:33:58	869ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 18:24:09	984ms	3 NS 1 A 1 MX	⚠️ Bogus
2026-06-16 18:20:57	775ms	3 NS 1 A 1 MX	🔒 Secure