holdbart.dk DNS records

🖥️ Nameservers4 records 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 40ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.157	3600s	linux269.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records2 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	holdbart-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca09::3 2a01:111:f403:ca09::4 2a01:111:f403:ca38::8 52.101.68.10 52.101.73.145 52.101.73.19 52.101.73.26	mail-db4pr02cu00307.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am6pr02cu00301.inbound.protection.outlook.com mail-as8pr04cu00803.inbound.protection.outlook.com mail-as9pr05cu01302.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
10	3600s	xxxxx.mail.protection.outlook.com	2a01:111:f403:c91d:: 2a01:111:f403:c91d::a 2a01:111:f403:f909::5 2a01:111:f403:f913:: 52.101.10.5 52.101.41.122 52.101.41.6 52.101.8.44	mail-mw2pr04cu00100.inbound.protection.outlook.com mail-co1pr21cu00202.inbound.protection.outlook.com mail-bn0pr04cu00805.inbound.protection.outlook.com mail-cy1pr03cu00100.inbound.protection.outlook.com mail-bn6pr04cu00105.inbound.protection.outlook.com mail-byapr02cu00302.inbound.protection.outlook.com mail-sj0pr03cu01406.inbound.protection.outlook.com mail-dm5pr04cu00104.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	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 81ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records4 records 171ms

TXT Record
google-site-verification=n_N9GZ95bCA3gdM3MbYEu4Qs7yOIyByb73optXrtwEA
MS=ms44508925
MS=msXXXXXXXX
v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

✉️ SPF

Policy	Record (holdbart.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

📨 DMARC

Policy	Record (_dmarc.holdbart.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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)

🔐 DNSSEC96ms

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

🏷️ SOA0ms

Field	Value
Serial	2025042300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

42ms

A

40ms

MX

37ms

AAAA

33ms

TXT

171ms

CAA

39ms

HTTPS

46ms

TLSA

670ms

SOA

0ms

MTA-STS

85ms

DNSSEC

96ms

SRV

81ms

Total

1570ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 07:12:29	1570ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-29 20:52:25	1092ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-28 04:36:32	2603ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-23 05:45:32	1169ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-20 21:04:41	2476ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 13:11:02	278ms	0 NS 0 A 0 MX	❓ Unknown	View