rc66.dk

📜 Historical scan 2026-08-24 21:42:06 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rc66.dk is a .dk domain served by 2 nameservers (hal.ns.cloudflare.com, margot.ns.cloudflare.com). It was registered on 28 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.65.229 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by rc66-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 146ms

Nameserver	IP addresses	PTR	ASN / ISP
hal.ns.cloudflare.com	108.162.193.174 172.64.33.174 173.245.59.174 2606:4700:58::adf5:3bae 2803:f800:50::6ca2:c1ae 2a06:98c1:50::ac40:21ae	hal.ns.cloudflare.com hal.ns.cloudflare.com hal.ns.cloudflare.com hal.ns.cloudflare.com hal.ns.cloudflare.com hal.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
margot.ns.cloudflare.com	108.162.194.167 162.159.38.167 172.64.34.167 2606:4700:50::a29f:26a7 2803:f800:50::6ca2:c2a7 2a06:98c1:50::ac40:22a7	margot.ns.cloudflare.com margot.ns.cloudflare.com margot.ns.cloudflare.com margot.ns.cloudflare.com margot.ns.cloudflare.com margot.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 137ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.65.229	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.193.232	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 113ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rc66-dk.mail.protection.outlook.com	2a01:111:f403:ca04::d 2a01:111:f403:ca09::2 2a01:111:f403:ca09::6 2a01:111:f403:ca09::b 52.101.103.143 52.101.68.18 52.101.68.27 52.101.68.5	mail-db6pr03cu00105.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-du2pr03cu00105.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 → 40.99.204.88

🔷 AAAA Records (IPv6)#

2 records 150ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:c1e8	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:41e5	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 205ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBBMwAgACDlVQ9YPAQImjMLl+v/nN6jVWh5mY1idybaKWzH74mOOwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1

📝 TXT Records#

3 records 413ms

TXT Record
google-site-verification=f_bi9XMdTQHW4KgKlHBsdqVvdmcGr73oJXGHyy-sJnU
MS=ms95565021
v=spf1 include:spf.protection.outlook.com ~all

✉️ SPF#

Policy	Record (rc66.dk)
~all (soft fail)	v=spf1 include:spf.protection.outlook.com ~all

📨 DMARC#

Policy	Record (_dmarc.rc66.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:648868ae41a04@dmarc.centerasecurity.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 2026-10-15 22:45:24

www	104.21.65.229 172.67.193.232 2606:4700:3035::ac43:c1e8 2606:4700:3037::6815:41e5 (AS13335) (address records, no CNAME)
www vs bare domain	Same network rc66.dk: 104.21.65.229 172.67.193.232 2606:4700:3035::ac43:c1e8 2606:4700:3037::6815:41e5 (AS13335) www.rc66.dk: 104.21.65.229 172.67.193.232 2606:4700:3035::ac43:c1e8 2606:4700:3037::6815:41e5 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-rc66-dk._domainkey.roedovrecentrum.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: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.rc66.dk	0dRyB7H4n9gLxrvxYi4U3LwIGS__x4V13pSmttn8R0E
TXT	_acme-challenge.rc66.dk	wDrTYeWK9gxXfWtKK6EddfhE9FtXz6PNmS7DcGmk98A

🔗 TLSA / DANE#

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

🔐 DNSSEC#

339ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2413033976
Primary NS (MNAME)	hal.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-15 23:06:51

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2025-11-28
Expires	2026-11-27 (39d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
asrc.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

146ms

137ms

113ms

AAAA

150ms

TXT

413ms

CAA

107ms

HTTPS

205ms

TLSA

1380ms

SOA

0ms

MTA-STS

158ms

DNSSEC

339ms

SRV

214ms

Total

3549ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 22:45:23	1239ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-09 13:31:24	1169ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-24 04:20:08	1584ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-22 16:30:40	1622ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-16 13:54:36	2355ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-09 19:57:47	2018ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-31 06:47:14	3014ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-29 08:46:37	1926ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-27 23:49:56	934ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-26 23:15:56	1000ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-24 21:42:06 shown	3549ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-22 19:14:05	2120ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-19 12:21:43	8747ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-07 06:51:38	1979ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-23 10:53:29	2657ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-15 14:19:42	1359ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-29 07:43:43	1080ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-23 16:43:21	1062ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 06:30:32	844ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-19 19:49:54	3600ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-17 19:01:44	5878ms	2 NS 2 A 1 MX	🔒 Secure