dividebyzero.dk DNS records

🖥️ Nameservers2 records 56ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.desec.io	2607:f740:e633:deec::2 45.54.76.1	ns1.desec.io ns1.desec.io	AS63911 NetActuate, Inc AS63911 NetActuate, Inc
ns2.desec.org	157.53.224.1 2607:f740:e00a:deec::2	ns2.desec.org ns2.desec.org	AS36217 NetActuate, Inc AS36217 NetActuate, Inc

🌍 A Records

🌍

No A records found

📧 MX Records2 records 53ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	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	3600s	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 Records2 records 205ms

TXT Record
protonmail-verification=d5b55c694b3c05ee1a167b5c67ccf10f922ff305
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF

Policy	Record (dividebyzero.dk)
~all (soft fail)	v=spf1 include:_spf.protonmail.ch ~all

📨 DMARC

Policy	Record (_dmarc.dividebyzero.dk)
p=quarantine	v=DMARC1; p=quarantine

📬 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 73ms

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

🔐 DNSSEC76ms

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	2025084772
Primary NS (MNAME)	get.desec.io
Responsible (RNAME)	get@desec.io
Refresh	86400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

56ms

A

51ms

MX

53ms

AAAA

51ms

TXT

205ms

CAA

58ms

HTTPS

53ms

TLSA

73ms

SOA

0ms

MTA-STS

66ms

DNSSEC

76ms

SRV

70ms

Total

873ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-03 11:56:42	873ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-28 01:24:38	606ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-25 23:55:51	831ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-21 05:02:00	9437ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-16 18:41:05	6561ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-15 00:27:32	1060ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-08-09 08:29:56	1318ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-31 14:48:56	1054ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-24 15:46:55	993ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-17 21:51:23	947ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-11 05:07:33	1305ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-07-03 18:30:59	2107ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-27 15:16:13	675ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-19 00:54:01	2180ms	2 NS 0 A 2 MX	🔒 Secure	View
2026-06-17 03:35:50	751ms	2 NS 0 A 2 MX	🔒 Secure	View