holtec.dk DNS records

🖥️ Nameservers2 records 250ms

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 228ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
78.46.10.53	3600s	dedi1853.your-server.de	AS24940	Hetzner Online GmbH	78.46.0.0/15	🇩🇪 Germany	Nuremberg

📧 MX Records1 records 255ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	holtec-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::8 2a01:111:f403:ca04::d 2a01:111:f403:ca04::e 52.101.68.29 52.101.68.5 52.101.73.16 52.101.73.30	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-am7pr05cu00306.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 → 40.104.116.8

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 347ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records4 records 469ms

TXT Record
_globalsign-domain-verification=OS3Pe0nvv2Femb6wbipx20logC4GXSarROxm6J8Q34
MS=ms18630889
v=spf1 mx ip4:178.132.236.124 ip4:89.184.153.86 ip4:89.239.198.126 ip4:37.128.222.246 ip4:152.115.131.194 ip4:185.235.208.27 ip4:178.132.236.124 ip4:178.132.236.126 include:spf.protection.outlook.com include:spf.mailanyone.net include:centex.dk include:spf.EU.exclaimer.net -all
vpe=283c09b8

✉️ SPF

Policy	Record (holtec.dk)
-all (hard fail)	v=spf1 mx ip4:178.132.236.124 ip4:89.184.153.86 ip4:89.239.198.126 ip4:37.128.222.246 ip4:152.115.131.194 ip4:185.235.208.27 ip4:178.132.236.124 ip4:178.132.236.126 include:spf.protection.outlook.com include:spf.mailanyone.net include:centex.dk include:spf.EU.exclaimer.net -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)

🔐 DNSSEC395ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081201
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

250ms

A

228ms

MX

255ms

AAAA

191ms

TXT

469ms

CAA

189ms

HTTPS

241ms

TLSA

1273ms

SOA

0ms

MTA-STS

289ms

DNSSEC

395ms

SRV

347ms

Total

4370ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-12 22:58:53	4370ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-19 04:40:52	1368ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-13 22:09:45	1385ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-24 17:52:21	1779ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-24 08:13:28	826ms	2 NS 1 A 1 MX	⚠️ Bogus	View
2026-06-17 13:41:36	2510ms	2 NS 1 A 1 MX	🔒 Secure	View