b1903.dk

📜 Historical scan 2026-07-03 08:00:26 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

b1903.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 24 January 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.243.49.112 is hosted by Netic A/S (AS42697) in Denmark. Mail is handled by b1903-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 45ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 37ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
77.243.49.112	60s	—	AS42697	Netic A/S	77.243.48.0/20	🇩🇰 Denmark	Aalborg

📧 MX Records#

1 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	b1903-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::7 2a01:111:f403:ca09::4 2a01:111:f403:ca09::8 52.101.68.3 52.101.68.32 52.101.68.5 52.101.73.1	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am3pr04cu00501.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 → 40.104.116.24

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 115ms

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

✉️ SPF#

Policy	Record (b1903.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.b1903.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:ba8a438ba76b831@rep.dmarcanalyzer.com; ruf=mailto:ba8a438ba76b831@for.dmarcanalyzer.com; pct=100; fo=1

📬 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 2026-10-16 12:31:17

www CNAME	dns.umbraco.io (all on umbraco.io) → 162.159.140.127 172.66.0.125 2606:4700:7::7d 2a06:98c1:58::7d (AS13335)
www vs bare domain	Different networks b1903.dk: 77.243.49.112 (AS42697) www.b1903.dk: 162.159.140.127 172.66.0.125 2606:4700:7::7d 2a06:98c1:58::7d (AS13335) (all like this)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-b1903-dk._domainkey.b1903.n-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-b1903-dk._domainkey.b1903.n-v1.dkim.mail.microsoft	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.

🔎 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#

121ms

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

🏷️ SOA#

35ms

Field	Value
Serial	2026033001
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-16 10:03:35

Field	Value
Registrar	DANDOMAIN A/S
Registered	2000-01-24
Expires	2027-03-31 (165d)

🔗 Same registrant#

0 domains

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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

45ms

37ms

45ms

AAAA

42ms

TXT

115ms

CAA

43ms

HTTPS

32ms

TLSA

244ms

SOA

35ms

MTA-STS

53ms

DNSSEC

121ms

SRV

47ms

Total

781ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 13:12:29	566ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 14:00:44	1107ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 17:40:34	1390ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-03 08:00:26 shown	781ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 19:25:56	1015ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:57:35	900ms	2 NS 1 A 1 MX	🔒 Secure