holdbi.dk DNS records

🖥️ Nameservers3 records 219ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 268ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.103.181	3600s	linux160.unoeuro.com	AS48854	team.blue Denmark A/S	94.231.96.0/20	🇩🇰 Denmark	—

📧 MX Records1 records 248ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx.simply.com	94.231.106.20	mx.simply.com	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	94.231.103.181
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 323ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records1 records 794ms

TXT Record
v=spf1 include:spf.simply.com -all

✉️ SPF

Policy	Record (holdbi.dk)
-all (hard fail)	v=spf1 include:spf.simply.com -all

📨 DMARC

Policy	Record (_dmarc.holdbi.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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 / DANE2 records 755ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	A9D603AF4D7ED6B9246B4B68500CD6F2…

🔐 DNSSEC655ms

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

🏷️ SOA0ms

Field	Value
Serial	2025042300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

219ms

A

268ms

MX

248ms

AAAA

239ms

TXT

794ms

CAA

243ms

HTTPS

257ms

TLSA

755ms

SOA

0ms

MTA-STS

471ms

DNSSEC

655ms

SRV

323ms

Total

4634ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-13 03:07:33	4634ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-08-12 01:43:59	1391ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-08-10 05:43:54	17123ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-08-09 04:46:12	9150ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-08-07 22:11:48	17560ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-31 12:20:23	1484ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-27 23:57:19	24998ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-26 23:20:25	3084ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-25 23:02:20	10062ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-24 22:52:26	10078ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-23 21:44:37	1121ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-20 22:39:50	10123ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-19 20:14:58	1146ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-18 13:03:50	10314ms	3 NS 0 A 0 MX	❓ Unknown	View
2026-07-17 07:23:03	10247ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-07-15 11:30:11	1095ms	3 NS 0 A 0 MX	⚠️ Bogus	View
2026-06-27 10:57:57	1298ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-25 09:46:20	672ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-21 14:40:53	532ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 10:50:21	483ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-20 06:34:32	2443ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-19 02:34:44	1819ms	3 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 13:16:03	282ms	0 NS 0 A 0 MX	❓ Unknown	View