co-4.dk

📜 Historical scan 2026-06-16 21:48:14 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

co-4.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 30 June 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.242 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by co4-dk0e.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 1091ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	—	—	—
ns2.simply.com	—	—	—
ns3.simply.com	—	—	—

🌍 A Records#

1 records 1102ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.242	—	linux331.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 1265ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	co4-dk0e.mail.protection.outlook.com	52.101.68.0 52.101.68.5 52.101.68.8 52.101.73.26	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 6060ms

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

✉️ SPF#

Policy	Record (co-4.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

📨 DMARC#

Policy	Record (_dmarc.co-4.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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 08:05:07

www	93.191.156.242 (AS48854) (address records, no CNAME)
www vs bare domain	Same network co-4.dk: 93.191.156.242 (AS48854) www.co-4.dk: 93.191.156.242 (AS48854)
Wildcard	Yes: any name under the zone resolves
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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

6555ms

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

🏷️ SOA#

1205ms

Field	Value
Serial	2026052105
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 2026-10-03 19:50:54

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2008-06-30
Expires	2027-06-30 (255d)

📋 WHOIS#

⏱️ Lookup Timing#

1091ms

1102ms

1265ms

AAAA

1276ms

TXT

6060ms

CAA

992ms

HTTPS

1043ms

TLSA

5805ms

SOA

1205ms

MTA-STS

4731ms

DNSSEC

6555ms

SRV

0ms

Total

57630ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-03 19:36:16	1400ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-26 18:46:58	1169ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-14 22:27:30	903ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-26 07:26:49	7673ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-22 15:28:58	1092ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 21:48:14 shown	57630ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-16 21:46:57	1887ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-16 21:30:46	889ms	3 NS 1 A 1 MX	🔒 Secure