c-centrum.dk

📜 Historical scan 2026-06-20 03:29:20 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-centrum.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.249 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by ccentrum-dk0c.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#

4 records 50ms

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
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 42ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.249	3600s	linux336.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	ccentrum-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04::8 2a01:111:f403:ca04::e 2a01:111:f403:ca09::6 2a01:111:f403:ca09::8 52.101.68.15 52.101.68.3 52.101.73.153 52.101.73.8	mail-db5pr02cu00100.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-am0pr04cu00500.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	93.191.156.249

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

5 records 320ms

TXT Record
brevo-code:c1683f5db130458c5e54ff15919b80ce
facebook-domain-verification=5m30h7f0qsqnxz8uum1qw8p538undm
MS=ms20229351
Sendinblue-code:c1683f5db130458c5e54ff15919b80ce
v=spf1 include:spf.sendinblue.com include:spf.dandomain.dk include:spf.protection.outlook.com include:spf.brevo.com mx ~all

✉️ SPF#

Policy	Record (c-centrum.dk)
~all (soft fail)	v=spf1 include:spf.sendinblue.com include:spf.dandomain.dk include:spf.protection.outlook.com include:spf.brevo.com mx ~all

📨 DMARC#

Policy	Record (_dmarc.c-centrum.dk)
p=quarantine	v=DMARC1; p=quarantine;

📬 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 14:02:43

www	93.191.156.249 (AS48854) (address records, no CNAME)
www vs bare domain	Same network c-centrum.dk: 93.191.156.249 (AS48854) www.c-centrum.dk: 93.191.156.249 (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

✍️ DKIM keys#

2 found

Selector	CNAME	Key
mail	—	RSA · ~1024 bit below 2048 bit
selector1	selector1-ccentrum-dk0c._domainkey.ccentrum.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: 7/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

128ms

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

🏷️ SOA#

42ms

Field	Value
Serial	2025070300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

50ms

42ms

49ms

AAAA

59ms

TXT

320ms

CAA

46ms

HTTPS

44ms

TLSA

721ms

SOA

42ms

MTA-STS

44ms

DNSSEC

128ms

SRV

705ms

Total

1798ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 14:02:43	1117ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-09 08:55:20	1022ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-01 04:55:24	1377ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-20 03:29:20 shown	1798ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 18:45:16	647ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 18:40:16	4681ms	4 NS 1 A 1 MX	🔒 Secure