holco.dk DNS records

🖥️ Nameservers2 records 25ms

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 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.213.85	3600s	webcluster1.webpod13-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records1 records 24ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	holco-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::6 2a01:111:f403:ca04::e 2a01:111:f403:ca09::2 52.101.181.153 52.101.68.15 52.101.68.18 52.101.73.126	mail-du2pr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-am8pr83cu00106.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

🔷 AAAA Records (IPv6)1 records 29ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:10b:aa:844b:531:8ef9	3600s	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 85ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 128ms

TXT Record
apple-domain-verification=PIaeL7HFCt9I7OGV
v=spf1 ip4:152.115.85.10 ip4:81.19.249.83 include:dedicated.mysmtp.com include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (holco.dk)
-all (hard fail)	v=spf1 ip4:152.115.85.10 ip4:81.19.249.83 include:dedicated.mysmtp.com include:spf.protection.outlook.com -all

📨 DMARC

Policy	Record (_dmarc.holco.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100; rua=mailto:dmarcreports@lovable.dev

📬 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)

🔐 DNSSEC101ms

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

🏷️ SOA0ms

Field	Value
Serial	2026083005
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

25ms

A

28ms

MX

24ms

AAAA

29ms

TXT

128ms

CAA

36ms

HTTPS

24ms

TLSA

867ms

SOA

0ms

MTA-STS

40ms

DNSSEC

101ms

SRV

85ms

Total

1370ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 14:24:37	1370ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-29 07:15:24	1763ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-06 23:31:15	1959ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-23 22:33:47	1076ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-01 22:59:54	698ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-29 15:32:50	1033ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-26 18:43:42	755ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-25 15:28:42	1736ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 04:00:44	6179ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 13:18:00	271ms	0 NS 0 A 0 MX	❓ Unknown	View