4c.dk

📜 Historical scan 2026-06-25 22:14:39 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4c.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 23 February 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by ms99896895.msv1.invalid.outlook.com, 4c-dk.mail.protection.outlook.com. 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 207ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 207ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
86.58.155.102	43200s	—	—	—	—	🇩🇰 Denmark	Copenhagen

📧 MX Records#

2 records 436ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	ms99896895.msv1.invalid.outlook.com	—	—	—
10	600s	4c-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::5 2a01:111:f403:ca04::a 2a01:111:f403:ca04::b 52.101.68.29 52.101.73.12 52.101.73.24 52.101.73.28	mail-db4pr02cu00204.inbound.protection.outlook.com mail-db3pr0202cu00205.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am7pr05cu00204.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

🔌 SRV Records#

1 records 251ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 618ms

TXT Record
MS=ms99896895
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (4c.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 2026-10-12 19:44:55

www	86.58.155.102 (address records, no CNAME)
www vs bare domain	Same network 4c.dk: 86.58.155.102 www.4c.dk: 86.58.155.102
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
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#

471ms

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

🏷️ SOA#

200ms

Field	Value
Serial	2026061901
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-17 16:42:48

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-02-23
Expires	2027-02-28 (131d)

🔗 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
wknd.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

207ms

436ms

AAAA

234ms

TXT

618ms

CAA

213ms

HTTPS

199ms

TLSA

304ms

SOA

200ms

MTA-STS

251ms

DNSSEC

471ms

SRV

251ms

Total

1690ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-24 05:26:29	960ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-26 10:41:50	960ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-20 20:52:33	2249ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-21 00:15:20	1178ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-01 06:10:09	931ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-25 22:14:39 shown	1690ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-25 19:59:26	973ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-23 10:01:26	921ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-16 12:54:00	1692ms	2 NS 1 A 2 MX	🔒 Secure