rkskole.dk DNS records

🖥️ Nameservers2 records 34ms

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 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
188.180.86.52	43200s	—	AS3292	TDC Holding A/S	188.176.0.0/13	🇩🇰 Denmark	Frederiksberg

📧 MX Records1 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	rkskole-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca09::f 2a01:111:f403:ca21::c 2a01:111:f403:ca38::8 52.101.181.153 52.101.181.156 52.101.68.27 52.101.68.39	mail-db4pr02cu00406.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-wa4pr05cu00104.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-db7pr03cu00607.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
🔶 Autoconfig	188.180.86.52

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 66ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records7 records 138ms

TXT Record
apple-domain-verification=G2HjdC4FbCoctdCA
classroom-cloud-domain-verification=64114bb5-52e7-40bb-951c-9c9eae5c7e72
f8lnnln23nfkfsuptmniene27c
MS=ms69448750
rbvmlhbi5qde553119ffvn4j6o
ti4rdk4ifogre1ef4kiueaqck1
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (rkskole.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

🔗 TLSA / DANE

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

🔐 DNSSEC103ms

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

🏷️ SOA0ms

Field	Value
Serial	2026090101
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

34ms

A

34ms

MX

32ms

AAAA

33ms

TXT

138ms

CAA

40ms

HTTPS

30ms

TLSA

309ms

SOA

0ms

MTA-STS

49ms

DNSSEC

103ms

SRV

66ms

Total

865ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-04 19:40:25	865ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-26 14:58:47	866ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-27 06:37:06	5083ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-01 06:48:15	805ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 17:41:55	933ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-19 21:55:46	4809ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 22:03:59	1303ms	2 NS 1 A 1 MX	🔒 Secure	View