secure4u.dk DNS records

🖥️ Nameservers2 records 86ms

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 95ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
92.241.201.76	600s	—	AS3342	Cibicom A/S	92.241.192.0/20	🇩🇰 Denmark	—

📧 MX Records1 records 176ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	secure4u-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca04::d 2a01:111:f403:ca09::5 2a01:111:f403:ca48::8 52.101.68.32 52.101.73.11 52.101.73.123 52.101.73.15	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-am9pr04cu00107.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 → 40.104.116.56

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 211ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 429ms

TXT Record
MS=ms32102014
v=spf1 mx include:mx1.ghosting.dk include:spf.mailjet.com include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (secure4u.dk)
-all (hard fail)	v=spf1 mx include:mx1.ghosting.dk include:spf.mailjet.com include:spf.protection.outlook.com -all

📨 DMARC

Policy	Record (_dmarc.secure4u.dk)
p=reject	v=DMARC1; p=reject

📬 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.secure4u.dk	GyQL3Eia3IwQuR_A0eaL0aGt4YekvPrd7CLB8HuHMfw

🔗 TLSA / DANE

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

🔐 DNSSEC371ms

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

🏷️ SOA0ms

Field	Value
Serial	2026083001
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

86ms

A

95ms

MX

176ms

AAAA

170ms

TXT

429ms

CAA

183ms

HTTPS

99ms

TLSA

766ms

SOA

0ms

MTA-STS

211ms

DNSSEC

371ms

SRV

211ms

Total

2043ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-30 20:58:40	2043ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-16 17:01:08	5225ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-02 21:39:23	9085ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-10 04:15:31	1374ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-03 21:17:19	2726ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 14:02:42	1670ms	2 NS 1 A 1 MX	🔒 Secure	View