holdbart.dk

📜 Historical scan 2026-06-20 21:04:41 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

holdbart.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 18 January 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.157 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by holdbart-dk.mail.protection.outlook.com, xxxxx.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 71ms

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 Records#

1 records 81ms

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 Records#

2 records 79ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	holdbart-dk.mail.protection.outlook.com	2a01:111:f403:ca04::f 2a01:111:f403:ca09::3 2a01:111:f403:ca09::4 2a01:111:f403:ca09::d 52.101.68.0 52.101.68.36 52.101.68.8 52.101.73.24	mail-db7pr03cu00507.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-as8pr05cu00300.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::a 2a01:111:f403:c922::1 2a01:111:f403:f802::2 2a01:111:f403:f902::2 40.93.192.4 52.101.11.19 52.101.41.3 52.101.50.10	mail-co1pr21cu00202.inbound.protection.outlook.com mail-bl0pr05cu00501.inbound.protection.outlook.com mail-sj2pr05cu00202.inbound.protection.outlook.com mail-mn2pr02cu00202.inbound.protection.outlook.com mail-dm2pr04cu00404.inbound.protection.outlook.com mail-sa9pr04cu00203.inbound.protection.outlook.com mail-sj2pr05cu00103.inbound.protection.outlook.com mail-mw2pr02cu00502.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 → 40.104.116.24
🔶 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 Records#

2 records 130ms

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

📝 TXT Records#

4 records 377ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-13 10:24:22

www	94.231.103.100 (AS48854) (address records, no CNAME)
www vs bare domain	Same network holdbart.dk: 94.231.103.100 (AS48854) www.holdbart.dk: 94.231.103.100 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

214ms

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

🏷️ SOA#

78ms

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#

WHOIS fetched 2026-10-08 22:02:29

Field	Value
Registrar	Simply.com A/S
Registered	2022-01-18
Expires	2027-01-17 (89d)

📋 WHOIS#

⏱️ Lookup Timing#

71ms

81ms

79ms

AAAA

71ms

TXT

377ms

CAA

88ms

HTTPS

88ms

TLSA

1198ms

SOA

78ms

MTA-STS

103ms

DNSSEC

214ms

SRV

130ms

Total

2476ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 02:35:59	3035ms	4 NS 1 A 2 MX	🔒 Secure
2026-10-01 02:19:15	768ms	4 NS 1 A 2 MX	🔒 Secure
2026-09-26 10:55:52	825ms	4 NS 1 A 2 MX	🔒 Secure
2026-09-10 08:42:30	947ms	4 NS 1 A 2 MX	🔒 Secure
2026-08-27 07:12:29	1570ms	4 NS 1 A 2 MX	🔒 Secure
2026-06-29 20:52:25	1092ms	4 NS 1 A 2 MX	🔒 Secure
2026-06-28 04:36:32	2603ms	4 NS 1 A 2 MX	🔒 Secure
2026-06-23 05:45:32	1169ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 21:04:41 shown	2476ms	4 NS 1 A 2 MX	🔒 Secure
2026-06-17 13:11:02	278ms	0 NS 0 A 0 MX	❓ Unknown