cff.dk

📜 Historical scan 2026-06-23 00:44:16 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cff.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 2 February 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 212.97.141.159 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by cff-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 272ms

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 233ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
212.97.141.159	600s	web16.curanet.dk	AS48854	team.blue Denmark A/S	212.97.140.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 259ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	cff-dk.mail.protection.outlook.com	2a01:111:f403:ca04::f 2a01:111:f403:ca09:: 2a01:111:f403:ca09::7 2a01:111:f403:ca09::9 52.101.68.15 52.101.68.16 52.101.68.39 52.101.73.6	mail-db7pr03cu00507.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-am6pr04cu00306.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 → 52.97.142.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 648ms

TXT Record
ca3-9e254e697d274066b5f32e546d33d1db
MS=ms25304379
v=spf1 mx a include:dedicated.mysmtp.com a:mail.hhdrift.dk include:spf.protection.outlook.com include:rpost.net -all

✉️ SPF#

Policy	Record (cff.dk)
-all (hard fail)	v=spf1 mx a include:dedicated.mysmtp.com a:mail.hhdrift.dk include:spf.protection.outlook.com include:rpost.net -all

📨 DMARC#

Policy	Record (_dmarc.cff.dk)
p=none (monitor only)	v=DMARC1; p=none; sp=none; adkim=r; aspf=r; rua=mailto:abuse@cff.dk; ruf=mailto:abuse@cff.dk; fo=0; pct=100; ri=86400

📬 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 2026-10-10 00:35:40

www	212.97.141.159 (AS48854) (address records, no CNAME)
www vs bare domain	Same network cff.dk: 212.97.141.159 (AS48854) www.cff.dk: 212.97.141.159 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
default	—	RSA · ~1024 bit below 2048 bit
selector1	selector1-cff-dk._domainkey.cystiskfibrose.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: 10/10 · policy: -all

warn 10 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

428ms

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

🏷️ SOA#

201ms

Field	Value
Serial	2026033101
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 2026-10-04 22:17:56

Field	Value
Registrar	ONE.COM A/S
Registered	2001-02-02
Expires	2027-03-31 (165d)

📋 WHOIS#

⏱️ Lookup Timing#

272ms

233ms

259ms

AAAA

313ms

TXT

648ms

CAA

175ms

HTTPS

189ms

TLSA

331ms

SOA

201ms

MTA-STS

253ms

DNSSEC

428ms

SRV

418ms

Total

3076ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 21:37:49	1276ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-29 20:57:58	1528ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-23 19:31:54	1461ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 11:53:13	856ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 00:44:16 shown	3076ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 00:24:33	950ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 04:01:10	700ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 20:23:12	1333ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 20:10:41	667ms	2 NS 1 A 1 MX	🔒 Secure