postacon.dk DNS records

🖥️ Nameservers2 records 48ms

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
52.18.183.77	3600s	ec2-52-18-183-77.eu-west-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	52.16.0.0/14	🇮🇪 Ireland	Dublin

📧 MX Records1 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	postacon-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::7 2a01:111:f403:ca04::e 2a01:111:f403:ca09::c 52.101.68.16 52.101.68.25 52.101.73.155 52.101.73.6	mail-db7pr03cu00401.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-am7pr02cu00203.inbound.protection.outlook.com mail-am6pr04cu00306.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 → 40.104.116.40
🔶 Autoconfig	52.18.183.77

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 71ms

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

📝 TXT Records1 records 176ms

TXT Record
v=spf1 include:spf.protection.outlook.com include:amazonses.com -all

✉️ SPF

Policy	Record (postacon.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:amazonses.com -all

📨 DMARC

Policy	Record (_dmarc.postacon.dk)
p=quarantine	v=DMARC1; p=quarantine; ruf=mailto:ft@postacon.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 / DANE

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

🔐 DNSSEC80ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081201
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

48ms

A

43ms

MX

39ms

AAAA

43ms

TXT

176ms

CAA

54ms

HTTPS

42ms

TLSA

177ms

SOA

0ms

MTA-STS

53ms

DNSSEC

80ms

SRV

71ms

Total

695ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 08:24:51	695ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-13 01:03:00	2075ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-02 04:32:33	9371ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-19 10:27:39	3332ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-14 04:18:32	964ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-24 20:41:09	2721ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 22:15:13	3166ms	2 NS 1 A 1 MX	🔒 Secure	View