rfcenter.dk

📜 Historical scan 2026-07-15 19:38:07 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rfcenter.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 22 October 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.47.247.18 is hosted by One.com A/S (AS51468). Mail is handled by rfcenter-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 125ms

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 124ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.47.247.18	3600s	one.com.webforward.g1i.one	AS51468	One.com A/S	195.47.247.0/24	—	—

📧 MX Records#

1 records 111ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rfcenter-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca09::2 2a01:111:f403:ca09::6 2a01:111:f403:ca09::9 52.101.68.12 52.101.68.32 52.101.68.5 52.101.73.12	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am4pr0401cu00104.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 → 52.98.213.120

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 304ms

TXT Record
MS=ms42906946
v=spf1 include:_spf.centerasecurity.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (rfcenter.dk)
-all (hard fail)	v=spf1 include:_spf.centerasecurity.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.rfcenter.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-11 01:27:44

www	195.47.247.18 (AS51468) (address records, no CNAME)
www vs bare domain	Same network rfcenter.dk: 195.47.247.18 (AS51468) www.rfcenter.dk: 195.47.247.18 (AS51468)
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
selector1	selector1-rfcenter-dk._domainkey.rodovrefrivilligcenter.n-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-rfcenter-dk._domainkey.rodovrefrivilligcenter.n-v1.dkim.mail.microsoft	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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

197ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026071101
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 2026-10-11 02:01:31

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2010-10-22
Expires	2027-10-31 (370d)

📋 WHOIS#

⏱️ Lookup Timing#

125ms

124ms

111ms

AAAA

142ms

TXT

304ms

CAA

127ms

HTTPS

129ms

TLSA

264ms

SOA

0ms

MTA-STS

145ms

DNSSEC

197ms

SRV

246ms

Total

1483ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 01:27:44	1649ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-08 23:00:50	1107ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-07 22:06:36	1229ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-15 01:27:37	1301ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-08 00:21:36	1346ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 12:41:02	1350ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-11 15:08:41	9013ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-15 19:38:07 shown	1483ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-07 05:00:13	3486ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 21:28:32	3131ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 13:14:16	1056ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 18:43:44	995ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 21:49:25	911ms	2 NS 1 A 1 MX	🔒 Secure