lookback.dk DNS records

🖥️ Nameservers2 records 51ms

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 87ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
3.120.120.3	43200s	enforcer.darknet.dk	AS16509	Amazon.com, Inc.	3.96.0.0/11	🇩🇪 Germany	Frankfurt am Main

📧 MX Records3 records 66ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mx1.mailserver.darknet.dk	2a05:d014:dc7:7220::10 3.120.120.100	mailserver.darknet.dk mailserver.darknet.dk	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
20	43200s	mx2.mailserver.darknet.dk	2a05:d014:dc7:7220::10	mailserver.darknet.dk	AS16509 Amazon.com, Inc.
30	43200s	mx3.mailserver.darknet.dk	2a05:d014:dc7:7220::10 3.120.120.100	mailserver.darknet.dk mailserver.darknet.dk	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	lookback.dk → 3.120.120.3
🔶 Autoconfig	lookback.dk → 3.120.120.3

🔷 AAAA Records (IPv6)1 records 59ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a05:d014:dc7:7220::20	43200s	enforcer.darknet.dk	AS16509	Amazon.com, Inc.	2a05:d000:0:0:0:0:0:0/25	🇩🇪 Germany	Frankfurt am Main

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 264ms

TXT Record
spf2.0/pra
v=spf1 include:_spf.mailserver.darknet.dk -all

✉️ SPF

Policy	Record (lookback.dk)
-all (hard fail)	v=spf1 include:_spf.mailserver.darknet.dk -all

📨 DMARC

Policy	Record (_dmarc.lookback.dk)
p=reject	v=DMARC1; pct=100; p=reject; rua=mailto:dmarc-reports@mailserver.darknet.dk; ruf=mailto:dmarc-reports@mailserver.darknet.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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.lookback.dk	lookback.dk

🔗 TLSA / DANE

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

🔐 DNSSEC174ms

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

🏷️ SOA47ms

Field	Value
Serial	2026080101
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

51ms

A

87ms

MX

66ms

AAAA

59ms

TXT

264ms

CAA

69ms

HTTPS

99ms

TLSA

4070ms

SOA

47ms

MTA-STS

135ms

DNSSEC

174ms

SRV

125ms

Total

9785ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-22 04:30:36	9785ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-08-15 14:48:20	9216ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-08-07 11:23:35	4188ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-03 16:04:46	1011ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-07-01 12:15:43	980ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 11:34:09	1407ms	2 NS 1 A 3 MX	🔒 Secure	View