deff.dk DNS records

🖥️ Nameservers2 records 64ms

Nameserver	IP addresses	PTR	ASN / ISP
ns6.sitnet.dk	107.162.234.197 2604:e180:1071::3:1	— —	AS55002 F5, Inc. AS55002 F5, Inc.
ns7.sitnet.dk	107.162.176.221 2604:e180:1071::ffff:6ba2:b0dd	— —	AS55002 F5, Inc. AS55002 F5, Inc.

🌍 A Records1 records 62ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
82.103.135.52	3600s	e82-103-135-52s.cust.asergo.com	AS30736	Asergo Holding ApS	82.103.128.0/18	🇩🇰 Denmark	—

📧 MX Records1 records 70ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	barracuda.aub.aau.dk	130.225.53.23	barracuda.aub.aau.dk	AS1835 IDDQD-AS

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	deff.dk → 82.103.135.52
🔶 Autoconfig	deff.dk → 82.103.135.52

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 378ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (deff.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.deff.dk)
p=reject	v=DMARC1; p=reject; sp=reject; rua=mailto:tcod1eh2@ag.eu.dmarcadvisor.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

🔏 ACME Challenge

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

🔗 TLSA / DANE

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

🔐 DNSSEC141ms

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

🏷️ SOA0ms

Field	Value
Serial	12212
Primary NS (MNAME)	ns6.sitnet.dk
Responsible (RNAME)	hostmaster@statens-it.dk
Refresh	10800s
Retry	1080s
Expire	2419200s
Minimum (neg-cache TTL)	300s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

64ms

A

62ms

MX

70ms

AAAA

63ms

TXT

378ms

CAA

71ms

HTTPS

69ms

TLSA

313ms

SOA

0ms

MTA-STS

79ms

DNSSEC

141ms

SRV

162ms

Total

9162ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 22:53:52	9162ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-30 21:36:26	18570ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-29 19:33:48	18201ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-28 17:15:22	9379ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-27 14:09:34	1317ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-26 12:50:10	9365ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-24 19:25:25	5295ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-23 18:27:47	7059ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-22 17:01:22	7114ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-21 16:58:24	9459ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-20 16:54:23	17629ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-19 14:40:20	7963ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-18 14:36:59	3575ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-17 13:46:56	1451ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-16 05:37:03	17374ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-15 04:20:17	9400ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-14 02:51:14	6473ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-13 01:39:27	3658ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-11 12:02:35	7071ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-10 01:15:24	14073ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-03 08:43:45	19127ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-29 22:12:40	5358ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-28 21:29:25	5798ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-27 17:43:13	5445ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-26 17:05:36	9082ms	2 NS 1 A 1 MX	🔒 Secure	View