cels.dk DNS records

🖥️ Nameservers2 records 55ms

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 56ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.15.73.125	600s	xb90f497d.customers.hiper-net.dk	AS203953	Hiper A/S	185.15.72.0/22	🇩🇰 Denmark	Værløse

📧 MX Records3 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	cels-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::d 2a01:111:f403:ca09::20 2a01:111:f403:ca09::c 52.101.73.1 52.101.73.153 52.101.73.16 52.101.73.26	mail-db7pr03cu00401.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-as2pr05cu00100.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
99	600s	mail.cels.dk	185.15.73.125	xb90f497d.customers.hiper-net.dk	AS203953 Hiper A/S
999	600s	116809665.pamx1.hotmail.com	40.93.192.0 52.101.11.4 52.101.124.116 52.101.41.20	— — — —	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	185.15.73.125

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 80ms

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

📝 TXT Records2 records 190ms

TXT Record
MS=ms51618181
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.cels.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100; ruf=mailto:ruf@Cels.dk

📬 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

🏷️ SOA49ms

Field	Value
Serial	2026071801
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

55ms

A

56ms

MX

49ms

AAAA

151ms

TXT

190ms

CAA

46ms

HTTPS

46ms

TLSA

443ms

SOA

49ms

MTA-STS

79ms

DNSSEC

96ms

SRV

80ms

Total

5807ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-12 18:26:06	17321ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-08-11 10:28:13	5807ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-19 07:35:15	1344ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-15 15:13:28	1486ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-11 12:08:05	5958ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-01 23:48:33	1830ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-29 02:02:39	1165ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 20:13:02	2584ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 20:07:08	65535ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-16 20:05:16	892ms	2 NS 1 A 3 MX	⚠️ Bogus	View
2026-06-16 20:01:37	753ms	2 NS 1 A 3 MX	🔒 Secure	View