sem.dk DNS records

🖥️ Nameservers2 records 32ms

Nameserver	IP addresses	PTR	ASN / ISP
dee.ns.cloudflare.com	108.162.192.93 172.64.32.93 173.245.58.93 2606:4700:50::adf5:3a5d 2803:f800:50::6ca2:c05d 2a06:98c1:50::ac40:205d	dee.ns.cloudflare.com dee.ns.cloudflare.com dee.ns.cloudflare.com dee.ns.cloudflare.com dee.ns.cloudflare.com dee.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
marty.ns.cloudflare.com	108.162.193.204 172.64.33.204 173.245.59.204 2606:4700:58::adf5:3bcc 2803:f800:50::6ca2:c1cc 2a06:98c1:50::ac40:21cc	marty.ns.cloudflare.com marty.ns.cloudflare.com marty.ns.cloudflare.com marty.ns.cloudflare.com marty.ns.cloudflare.com marty.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.59.215	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.184.23	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records3 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
40	300s	route2.mx.cloudflare.net	162.159.205.17 162.159.205.18 162.159.205.19 2606:4700:f5::10 2606:4700:f5::e 2606:4700:f5::f	route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net route2.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
46	300s	route3.mx.cloudflare.net	162.159.205.23 162.159.205.24 162.159.205.25 2606:4700:f5::11 2606:4700:f5::12 2606:4700:f5::13	route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net route3.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
95	300s	route1.mx.cloudflare.net	162.159.205.11 162.159.205.12 162.159.205.13 2606:4700:f5::b 2606:4700:f5::c 2606:4700:f5::d	route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net route1.mx.cloudflare.net	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🔷 AAAA Records (IPv6)2 records 31ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::6815:3bd7	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:b817	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 26ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.59.215,172.67.184.23 ech=AEX+DQBB7wAgACBE1Eqlr/7DkDPvKduVzDj+mly51qFBYNzqLjPAl1sZfQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:3bd7,2606:4700:3037::ac43:b817

📝 TXT Records1 records 170ms

TXT Record
v=spf1 include:_spf.mx.cloudflare.net ~all

✉️ SPF

Policy	Record (sem.dk)
~all (soft fail)	v=spf1 include:_spf.mx.cloudflare.net ~all

📨 DMARC

Policy	Record (_dmarc.sem.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:b4816397728449039222dc095e0cd30c@dmarc-reports.cloudflare.net

📬 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
TXT	_acme-challenge.sem.dk	cezcweF01Jgwcvup9qbIezHDFh8T56i3qK4rdx_om-w
TXT	_acme-challenge.sem.dk	oM2CPK5cwTLvr9UIltbs6vohuP7aWQPJeGgw-osYBK0

🔗 TLSA / DANE9 records 61ms

Service / Owner	Type	Cert association
SMTP _25._tcp.route1.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…
SMTP _25._tcp.route1.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.route1.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…
SMTP _25._tcp.route2.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.route2.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…
SMTP _25._tcp.route2.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…
SMTP _25._tcp.route3.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	9BE5B7D47F9EFF930C11EB04D27CAE6B…
SMTP _25._tcp.route3.mx.cloudflare.net	DANE-TA · SPKI · SHA-256	59E738E674221702AF1EDB87C5200C1A…
SMTP _25._tcp.route3.mx.cloudflare.net	DANE-EE · SPKI · SHA-256	0F0C6C164A36F97E7B4C5A5B69D6F4F2…

🔐 DNSSEC108ms

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

🏷️ SOA0ms

Field	Value
Serial	2413281219
Primary NS (MNAME)	dee.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

32ms

A

30ms

MX

39ms

AAAA

31ms

TXT

170ms

CAA

41ms

HTTPS

26ms

TLSA

61ms

SOA

0ms

MTA-STS

51ms

DNSSEC

108ms

SRV

61ms

Total

1101ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 20:16:19	2172ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-08-27 19:15:31	1101ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-08-26 19:02:39	1020ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-08-14 13:21:47	9772ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-07-26 22:21:26	1783ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-07-21 13:23:11	9839ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-06-26 21:36:57	913ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-06-26 05:41:28	1297ms	2 NS 2 A 3 MX	🔒 Secure	View
2026-06-18 04:02:32	1409ms	2 NS 2 A 3 MX	🔒 Secure	View