s-byg.dk

📜 Historical scan 2026-06-27 10:05:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

s-byg.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 28 July 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.131 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by sbyg-dk0c.mail.protection.outlook.com, ms40203179.msv1.invalid. The zone is DNSSEC-signed and validates, has no 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 491ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 361ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.131	3600s	linux23.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

2 records 379ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	sbyg-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::4 2a01:111:f403:ca04::5 2a01:111:f403:ca04::b 52.101.68.29 52.101.68.3 52.101.68.32 52.101.68.5	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db4pr02cu00204.inbound.protection.outlook.com mail-db3pr0202cu00205.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-du2pr03cu00105.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
32767	3600s	ms40203179.msv1.invalid	—	—	—

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24
🔶 Autoconfig	185.21.41.131

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 599ms

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

✉️ SPF#

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

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-09 12:42:15

www	185.21.41.131 (AS48854) (address records, no CNAME)
www vs bare domain	Same network s-byg.dk: 185.21.41.131 (AS48854) www.s-byg.dk: 185.21.41.131 (AS48854)
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

🔎 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#

527ms

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

🏷️ SOA#

223ms

Field	Value
Serial	2024021901
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-08 04:21:42

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2016-07-28
Expires	2027-07-31 (284d)

📋 WHOIS#

⏱️ Lookup Timing#

491ms

361ms

379ms

AAAA

351ms

TXT

599ms

CAA

372ms

HTTPS

490ms

TLSA

326ms

SOA

223ms

MTA-STS

224ms

DNSSEC

527ms

SRV

484ms

Total

1952ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 12:42:15	1010ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-24 23:30:55	1088ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-27 10:05:49 shown	1952ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-22 19:00:45	923ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-21 18:24:16	1174ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 14:16:56	2423ms	2 NS 1 A 2 MX	🔒 Secure