co-4.dk

📜 Historical scan 2026-06-26 07:26:49 · ← 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 157ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 165ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.242	3425s	linux331.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 176ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	co4-dk0e.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::6 2a01:111:f403:ca09:: 2a01:111:f403:ca09::6 52.101.68.12 52.101.73.11 52.101.73.16 52.101.73.19	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr04cu00803.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
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 257ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records#

1 records 399ms

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#

420ms

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

🏷️ SOA#

180ms

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#

157ms

165ms

176ms

AAAA

161ms

TXT

399ms

CAA

136ms

HTTPS

176ms

TLSA

689ms

SOA

180ms

MTA-STS

192ms

DNSSEC

420ms

SRV

257ms

Total

7673ms

🕐 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 shown	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	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