checkbit.dk DNS records

🖥️ Nameservers2 records 49ms

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 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.100.105.5	3600s	91.100.105.5.generic-hostname.arrownet.dk	AS15516	DKTV A/S	91.100.0.0/15	🇩🇰 Denmark	Ballerup Municipality

📧 MX Records1 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	checkbit-dk.mail.protection.outlook.com	2a01:111:f403:ca09::2 2a01:111:f403:ca09::20 2a01:111:f403:ca09::c 2a01:111:f403:ca09::d 52.101.68.10 52.101.73.1 52.101.73.12 52.101.73.22	mail-am0pr83cu00402.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am7pr05cu00106.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	checkbit.dk → 91.100.105.5

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 136ms

TXT Record
MS=ms28167286
v=spf1 ip4:91.100.105.5 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (checkbit.dk)
-all (hard fail)	v=spf1 ip4:91.100.105.5 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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.checkbit.dk	checkbit.dk

🔗 TLSA / DANE

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

🔐 DNSSEC118ms

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

🏷️ SOA58ms

Field	Value
Serial	2026061201
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

49ms

A

43ms

MX

45ms

AAAA

56ms

TXT

136ms

CAA

46ms

HTTPS

45ms

TLSA

122ms

SOA

58ms

MTA-STS

64ms

DNSSEC

118ms

SRV

69ms

Total

968ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 13:37:19	1323ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-25 06:34:17	3351ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-12 23:03:56	4772ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-19 00:34:25	3131ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-14 10:10:18	9214ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-02 00:21:18	968ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 20:26:06	685ms	2 NS 1 A 1 MX	🔒 Secure	View