rcn-bolig.dk

Records from scan: 2026-10-16 19:02:12 · 3185ms total · last checked 2026-10-17 19:12 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rcn-bolig.dk is a .dk domain served by 2 nameservers (brenna.ns.cloudflare.com, martin.ns.cloudflare.com). It was registered on 8 December 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.95.41 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by rcnbolig-dk0i.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 141ms

Nameserver	IP addresses	PTR	ASN / ISP
brenna.ns.cloudflare.com	108.162.194.176 162.159.38.176 172.64.34.176 2606:4700:50::a29f:26b0 2803:f800:50::6ca2:c2b0 2a06:98c1:50::ac40:22b0	brenna.ns.cloudflare.com brenna.ns.cloudflare.com brenna.ns.cloudflare.com brenna.ns.cloudflare.com brenna.ns.cloudflare.com brenna.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
martin.ns.cloudflare.com	108.162.195.87 162.159.44.87 172.64.35.87 2606:4700:58::a29f:2c57 2803:f800:50::6ca2:c357 2a06:98c1:50::ac40:2357	martin.ns.cloudflare.com martin.ns.cloudflare.com martin.ns.cloudflare.com martin.ns.cloudflare.com martin.ns.cloudflare.com martin.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 111ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.95.41	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.142.250	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 112ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rcnbolig-dk0i.mail.protection.outlook.com	2a01:111:f403:c967::c 2a01:111:f403:ca38::8 2a01:111:f403:ca3c::6 2a01:111:f403:ca48::10 52.101.181.153 52.101.185.114 52.101.68.10 52.101.73.123	mail-cpjpr05cu00204.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-zrxpr04cu00106.inbound.protection.outlook.com mail-miypr05cu00100.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-zrxpr04cu00102.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am6pr02cu00203.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 → 52.98.179.40

🔷 AAAA Records (IPv6)#

2 records 126ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:5f29	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:8efa	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 116ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.95.41,172.67.142.250 ech=AEX+DQBBdgAgACBg1vX2mVZfxDtSe4cb6mQi1vFlTIlGG+Rc5pfZ7OkhRQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:5f29,2606:4700:3037::ac43:8efa

📝 TXT Records#

2 records 250ms

TXT Record
MS=ms20904634
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (rcn-bolig.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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#

checked 2026-10-16 19:02:13

www	104.21.95.41 172.67.142.250 2606:4700:3034::6815:5f29 2606:4700:3037::ac43:8efa (AS13335) (address records, no CNAME)
www vs bare domain	Same network rcn-bolig.dk: 104.21.95.41 172.67.142.250 2606:4700:3034::6815:5f29 2606:4700:3037::ac43:8efa (AS13335) www.rcn-bolig.dk: 104.21.95.41 172.67.142.250 2606:4700:3034::6815:5f29 2606:4700:3037::ac43:8efa (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#

2 found

Selector	CNAME	Key
selector1	selector1-rcnbolig-dk0i._domainkey.rcnbolig.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-rcnbolig-dk0i._domainkey.rcnbolig.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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

175ms

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

🏷️ SOA#

86ms

Field	Value
Serial	2417584171
Primary NS (MNAME)	brenna.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-12 09:19:40

Field	Value
Registrar	Simply.com A/S
Registered	2024-12-08
Expires	2026-12-07 (50d)

🔗 Same registrant#

0 domains

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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

141ms

111ms

112ms

AAAA

126ms

TXT

250ms

CAA

123ms

HTTPS

116ms

TLSA

384ms

SOA

86ms

MTA-STS

153ms

DNSSEC

175ms

SRV

1076ms

Total

3185ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 19:02:12 shown	3185ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-12 09:01:42	3957ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-05 01:14:26	1378ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-01 00:53:31	1332ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-23 17:21:23	862ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-19 00:39:16	10459ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-29 01:53:30	2442ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-13 19:24:27	2009ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-06 22:38:51	3851ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-01 19:16:22	1845ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-13 22:44:33	1417ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-24 03:19:49	1057ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-18 07:59:12	1595ms	2 NS 2 A 1 MX	🔒 Secure