thefourth.dk DNS records

🖥️ Nameservers2 records 53ms

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 40ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.31.79.5	600s	v4-elastic-ingress.balancer01.hyperscalemega.cloud	AS47527	DLX A/S	185.31.76.0/22	🇩🇰 Denmark	Herning

📧 MX Records1 records 51ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	thefourth-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca09:: 2a01:111:f403:ca09::20 2a01:111:f403:ca09::6 52.101.73.12 52.101.73.16 52.101.73.19 52.101.73.28	mail-db4pr02cu00204.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr04cu00803.inbound.protection.outlook.com mail-am7pr05cu00204.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 → 52.97.153.184

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 368ms

TXT Record
MS=ms26868491
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (thefourth.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)

🔐 DNSSEC135ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081105
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

53ms

A

40ms

MX

51ms

AAAA

47ms

TXT

368ms

CAA

40ms

HTTPS

62ms

TLSA

132ms

SOA

0ms

MTA-STS

82ms

DNSSEC

135ms

SRV

141ms

Total

1292ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-12 14:35:46	1292ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-07 07:24:27	623ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-03 04:21:07	602ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-10 09:15:30	4650ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-08 03:49:50	555ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-02 09:13:15	655ms	2 NS 1 A 1 MX	🔒 Secure	View