rcs.dk DNS records

🖥️ Nameservers2 records 36ms

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 Records1 records 36ms

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 Records1 records 89ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	rcs-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca09::28 2a01:111:f403:ca09::3 2a01:111:f403:ca09::c 52.101.68.18 52.101.73.145 52.101.73.16 52.101.73.4	mail-db4pr02cu00204.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-am6pr02cu00301.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 40.104.116.40

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 94ms

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

📝 TXT Records1 records 183ms

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

🔗 TLSA / DANE

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

🔐 DNSSEC135ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082501
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 — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

36ms

A

36ms

MX

89ms

AAAA

40ms

TXT

183ms

CAA

34ms

HTTPS

50ms

TLSA

187ms

SOA

0ms

MTA-STS

90ms

DNSSEC

135ms

SRV

94ms

Total

915ms

🕐 Scan History

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