holtumdata.dk

📜 Historical scan 2026-09-09 16:41:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

holtumdata.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 23 May 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.86.66.145 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by holtumdata-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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#

2 records 31ms

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 Records#

1 records 29ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
20.86.66.145	3600s	—	AS8075	Microsoft Corporation	20.64.0.0/10	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	holtumdata-dk.mail.protection.outlook.com	2a01:111:f403:ca04::a 2a01:111:f403:ca04::e 2a01:111:f403:ca3c::8 2a01:111:f403:ca48::8 52.101.103.143 52.101.68.10 52.101.68.15 52.101.73.12	mail-du0pr03cu00102.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-zrxpr05cu00100.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-am4pr0401cu00104.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 → 40.100.4.170
🔶 Autoconfig	20.86.66.145

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 183ms

TXT Record
MS=ms66953522
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (holtumdata.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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-17 19:02:43

www	20.86.66.145 (AS8075) (address records, no CNAME)
www vs bare domain	Same network holtumdata.dk: 20.86.66.145 (AS8075) www.holtumdata.dk: 20.86.66.145 (AS8075)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-holtumdata-dk._domainkey.kia.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-holtumdata-dk._domainkey.kia.onmicrosoft.com	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

73ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026090101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-17 19:33:18

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2003-05-23
Expires	2027-05-31 (217d)

🔗 Same registrant#

4 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
k7group.dk	Punktum dk A/S (direct)
kjaergaard.dk	Punktum dk A/S (direct)
lyn-net.dk	Punktum dk A/S (direct)
roboticseurope.dk	DANDOMAIN A/S

📋 WHOIS#

⏱️ Lookup Timing#

31ms

29ms

49ms

AAAA

39ms

TXT

183ms

CAA

43ms

HTTPS

35ms

TLSA

932ms

SOA

0ms

MTA-STS

57ms

DNSSEC

73ms

SRV

111ms

Total

1494ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-17 19:02:43	938ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-12 10:13:23	1577ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-01 02:22:15	1155ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 03:46:21	782ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 01:18:50	1242ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-09 16:41:52 shown	1494ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 21:54:39	894ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 23:39:36	1122ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-21 13:55:32	5574ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-23 06:26:56	5559ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-26 15:47:35	751ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 15:30:39	977ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 14:24:02	776ms	2 NS 1 A 1 MX	🔒 Secure