serum.dk DNS records

🖥️ Nameservers2 records 116ms

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 91ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
40.68.148.255	3600s	—	AS8075	Microsoft Corporation	40.68.0.0/14	🇳🇱 The Netherlands	Amsterdam

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 549ms

TXT Record
v=spf1 -all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.serum.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

🔗 TLSA / DANE

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

🔐 DNSSEC242ms

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

🏷️ SOA0ms

Field	Value
Serial	1881
Primary NS (MNAME)	sit-dhcp001.prod.sitad.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

116ms

A

91ms

MX

114ms

AAAA

130ms

TXT

549ms

CAA

101ms

HTTPS

77ms

TLSA

201ms

SOA

0ms

MTA-STS

194ms

DNSSEC

242ms

SRV

208ms

Total

2047ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 06:19:22	2047ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-29 17:45:02	17089ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-28 09:22:58	5647ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-28 00:52:45	1472ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-26 23:38:44	9372ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-25 21:52:04	1221ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-24 20:01:53	2315ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-23 19:40:58	18150ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-22 13:51:44	6476ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-21 13:25:00	9494ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-20 13:16:04	5000ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-19 11:26:05	1543ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-18 11:25:15	2058ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-17 02:57:31	5589ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-15 19:09:51	3792ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-14 09:08:52	7666ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-11 21:19:48	2956ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-10 12:16:38	6833ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-09 06:14:01	3674ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-08-01 23:59:59	16924ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-28 13:02:46	9754ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-27 06:32:02	13878ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-26 05:54:04	17225ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-25 05:30:34	17241ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-24 05:09:09	17448ms	2 NS 1 A 0 MX	🔒 Secure	View