arp-nielsen.dk DNS records

🖥️ Nameservers4 records 72ms

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
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 69ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
212.237.249.12	3600s	lb1.builder.nu	AS48854	team.blue Denmark A/S	212.237.248.0/23	🇩🇰 Denmark	—

📧 MX Records2 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	eu-esec-01.heimdalsecurity.com	20.50.183.144 20.50.183.146	eu-esec-01.heimdalsecurity.com eu-esec-01.heimdalsecurity.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
1	3600s	eu-esec-02.heimdalsecurity.com	20.50.183.144 20.50.183.146	eu-esec-01.heimdalsecurity.com eu-esec-01.heimdalsecurity.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.149.184
🔶 Autoconfig	185.20.205.58

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 137ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 397ms

TXT Record
MS=ms59516480
v=spf1 include:spf.protection.outlook.com include:spf.simply.com include:spf-esec.heimdalsecurity.com -all

✉️ SPF

Policy	Record (arp-nielsen.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.simply.com include:spf-esec.heimdalsecurity.com -all

📨 DMARC

Policy	Record (_dmarc.arp-nielsen.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc@simson-it.dk; ruf=mailto:dmarc@simson-it.dk; fo=1

📬 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 112ms

Service / Owner	Type	Cert association
SMTP _25._tcp.eu-esec-01.heimdalsecurity.com	DANE-EE · SPKI · SHA-256	2E8933DD6DB99304A5A9D5C4ECDE7B8E…
SMTP _25._tcp.eu-esec-02.heimdalsecurity.com	DANE-EE · SPKI · SHA-256	2E8933DD6DB99304A5A9D5C4ECDE7B8E…

🔐 DNSSEC165ms

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

🏷️ SOA0ms

Field	Value
Serial	2026072203
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

72ms

A

69ms

MX

39ms

AAAA

29ms

TXT

397ms

CAA

26ms

HTTPS

46ms

TLSA

112ms

SOA

0ms

MTA-STS

80ms

DNSSEC

165ms

SRV

137ms

Total

1212ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-07-23 15:45:35	1212ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-07-22 13:45:16	3151ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-30 22:01:47	783ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-25 08:43:22	962ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-20 18:24:20	1233ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-16 13:41:27	793ms	4 NS 1 A 2 MX	🔒 Secure	View