3mb.dk

📜 Historical scan 2026-06-20 08:48:35 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3mb.dk is a .dk domain served by 2 nameservers (ns1.dnsserver.dk, ns2.dnsserver.dk). It was registered on 22 November 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.8.37.86 is hosted by Norlys Telco A/S (AS3308) in Denmark. Mail is handled by 3mb-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 229ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dnsserver.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.dnsserver.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 213ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.8.37.86	10800s	—	AS3308	Norlys Telco A/S	193.8.36.0/23	🇩🇰 Denmark	Ølstykke

📧 MX Records#

1 records 225ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	10800s	3mb-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::c 2a01:111:f403:ca09::3 2a01:111:f403:ca09::8 52.101.68.18 52.101.68.27 52.101.73.24 52.101.73.4	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 40.104.116.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 250ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

1 records 471ms

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

✉️ SPF#

Policy	Record (3mb.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.3mb.dk)
p=reject	v=DMARC1; p=reject; adkim=s; aspf=s;

📬 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 2026-10-08 02:25:51

www	193.8.37.86 (AS3308) (address records, no CNAME)
www vs bare domain	Same network 3mb.dk: 193.8.37.86 (AS3308) www.3mb.dk: 193.8.37.86 (AS3308)
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	selector1-3mb-dk._domainkey.godk43978322.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-3mb-dk._domainkey.godk43978322.onmicrosoft.com	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#

401ms

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

🏷️ SOA#

225ms

Field	Value
Serial	2026010501
Primary NS (MNAME)	ns1.dnsserver.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-10 13:47:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2023-11-22
Expires	2026-11-21 (34d)

📋 WHOIS#

⏱️ Lookup Timing#

229ms

213ms

225ms

AAAA

175ms

TXT

471ms

CAA

195ms

HTTPS

156ms

TLSA

826ms

SOA

225ms

MTA-STS

177ms

DNSSEC

401ms

SRV

250ms

Total

5780ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-22 08:19:12	1258ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 08:48:35 shown	5780ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 13:00:45	949ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:51:34	1681ms	2 NS 1 A 1 MX	🔒 Secure