rcs.dk

📜 Historical scan 2026-06-28 07:39:45 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rcs.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.215.161.69 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by rcs-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 44ms

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 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.215.161.69	3200s	relayingsmtp.wtm-rcs.dk	AS47292	Sentia Denmark A/S	91.215.160.0/22	🇩🇰 Denmark	Silkeborg

📧 MX Records#

1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	rcs-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::a 2a01:111:f403:ca09:: 2a01:111:f403:ca09::6 52.101.68.3 52.101.73.1 52.101.73.153 52.101.73.26	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-as9pr05cu01302.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 → 52.98.149.136

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 85ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	10	443	autodiscover.outlook.com

📝 TXT Records#

1 records 100ms

TXT Record
v=spf1 a mx include:spf.mtaroutes.com include:spf.protection.outlook.com include:_custspf.one.com ip4:77.68.148.160/29 ip4:91.215.163.48/29 ip4:91.215.161.24/29 -all

✉️ SPF#

Policy	Record (rcs.dk)
-all (hard fail)	v=spf1 a mx include:spf.mtaroutes.com include:spf.protection.outlook.com include:_custspf.one.com ip4:77.68.148.160/29 ip4:91.215.163.48/29 ip4:91.215.161.24/29 -all

📨 DMARC#

Policy	Record (_dmarc.rcs.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:5ygyuzpu@ag.dmarcian-eu.com; ruf=mailto:dmarc-reports@rcs.dk; aspf=s; adkim=s; sp=quarantine; fo=1; ri=86400; pct=100

📬 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 2026-10-08 08:20:44

www CNAME	rcs.dk (all on rcs.dk) → 91.215.161.69 (AS47292)
www vs bare domain	Same network rcs.dk: 91.215.161.69 (AS47292) www.rcs.dk: 91.215.161.69 (AS47292)
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-rcs-dk._domainkey.rcsdk.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-rcs-dk._domainkey.rcsdk.onmicrosoft.com	RSA · ~1024 bit below 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: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

110ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026062501
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

44ms

28ms

32ms

AAAA

40ms

TXT

100ms

CAA

43ms

HTTPS

33ms

TLSA

239ms

SOA

0ms

MTA-STS

46ms

DNSSEC

110ms

SRV

85ms

Total

809ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 08:20:44	1008ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-26 03:22:04	3023ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 01:30:26	1033ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-18 12:21:12	853ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-28 01:07:47	915ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 15:51:09	1853ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-26 04:22:19	1371ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-28 07:39:45 shown	809ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 09:28:09	1048ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 18:54:26	1703ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 12:40:58	1198ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 12:57:12	2415ms	2 NS 1 A 1 MX	🔒 Secure