4300cool.dk DNS records

🖥️ Nameservers2 records 79ms

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 53ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
172.104.229.205	900s	172-104-229-205.ip.linodeusercontent.com	AS63949	Akamai Connected Cloud	172.104.224.0/19	🇩🇪 Germany	Frankfurt am Main

📧 MX Records1 records 70ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	43200s	4300cool-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::f 2a01:111:f403:ca09::3 2a01:111:f403:ca09::b 52.101.68.15 52.101.73.16 52.101.73.28 52.101.73.6	mail-db7pr03cu00401.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am7pr05cu00204.inbound.protection.outlook.com mail-am6pr04cu00306.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
🔶 Autoconfig	4300cool.dk → 172.104.229.205

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 251ms

TXT Record
v=spf1 include:spf.protection.outlook.com include:mailgun.org -all

✉️ SPF

Policy	Record (4300cool.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:mailgun.org -all

📨 DMARC

Policy	Record (_dmarc.4300cool.dk)
p=quarantine	v=DMARC1; p=quarantine; 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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.4300cool.dk	4300cool.dk

🔗 TLSA / DANE

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

🔐 DNSSEC186ms

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

🏷️ SOA0ms

Field	Value
Serial	2026032401
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

79ms

A

53ms

MX

70ms

AAAA

82ms

TXT

251ms

CAA

80ms

HTTPS

96ms

TLSA

182ms

SOA

0ms

MTA-STS

126ms

DNSSEC

186ms

SRV

98ms

Total

3359ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-24 14:22:36	3359ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:59:27	1976ms	2 NS 1 A 1 MX	🔒 Secure	View