sentinel.dk DNS records

🖥️ Nameservers2 records 148ms

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

🌍

No A records found

📧 MX Records2 records 153ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	1800s	mail.protonmail.ch	176.119.200.128 185.205.70.128 185.70.42.128	mail.protonmail.ch mail.protonmail.ch mail.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG
20	1800s	mailsec.protonmail.ch	176.119.200.129 185.205.70.129 185.70.42.129	mailsec.protonmail.ch mailsec.protonmail.ch mailsec.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records3 records 249ms

TXT Record
protonmail-verification=b9c9fdec7fcff3e25fa1155996c8cc251ccb50a8
v=DMARC1; p=quarantine
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF

Policy	Record (sentinel.dk)
~all (soft fail)	v=spf1 include:_spf.protonmail.ch ~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 / DANE4 records 49ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…

🔐 DNSSEC171ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	2026090401
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

148ms

A

120ms

MX

153ms

AAAA

126ms

TXT

249ms

CAA

109ms

HTTPS

151ms

TLSA

49ms

SOA

0ms

MTA-STS

126ms

DNSSEC

171ms

SRV

147ms

Total

880ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-05 00:32:18	880ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-26 22:25:13	922ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-26 04:50:12	762ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-06 13:32:53	1915ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-11 03:37:02	6933ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-06 11:37:33	2134ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-26 02:59:15	556ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-24 00:20:37	1183ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-20 20:59:53	2412ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-18 07:54:30	723ms	2 NS 0 A 2 MX	🔒 Secure	View