teoriundervisning.dk DNS records

🖥️ Nameservers4 records 93ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.nhl-data.dk	185.136.96.11 2a06:fb00:1::1:11	ns1.nhl-data.dk ns1.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns2.nhl-data.dk	185.136.97.11 2a06:fb00:1::2:11	ns2.nhl-data.dk ns2.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns3.nhl-data.dk	185.136.98.11 2a06:fb00:1::3:11	ns3.nhl-data.dk ns3.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd
ns4.nhl-data.dk	185.136.99.11 2a06:fb00:1::4:11	ns4.nhl-data.dk ns4.nhl-data.dk	AS203391 Cloud DNS Ltd AS203391 Cloud DNS Ltd

🌍 A Records1 records 91ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
76.76.21.21	300s	—	AS16509	Amazon.com, Inc.	76.76.21.0/24	🇺🇸 United States	Walnut

📧 MX Records1 records 85ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.nhl-data.dk	87.116.7.13	mail.nhl-data.dk	AS31027 GlobalConnect A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	76.76.21.21
🔶 Autoconfig	76.76.21.21

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records4 records 320ms

TXT Record
12lf2rz0ywrwhfym1jzlq3mbyvzkf7sr
google-site-verification=1apr0lCgx79yXnlkkb0Gj8P-U8T285JuxId2MMCyZQM
google-site-verification=p9_Se2CCg2BCfIIp2x9J1vxZkO5JiDv_teLFjAg6plk
v=spf1 include:spf.mandrillapp.com include:spf.nhl-data.dk ip4:159.135.136.4 ip4:159.135.137.168 ip4:159.135.137.175 ip4:159.135.138.235 ip4:159.135.138.236 ip4:159.135.138.237 ip4:159.135.138.238 ip4:159.135.138.239 ip4:159.135.141.254 ip4:159.135.141.255 -all

✉️ SPF

Policy	Record (teoriundervisning.dk)
-all (hard fail)	v=spf1 include:spf.mandrillapp.com include:spf.nhl-data.dk ip4:159.135.136.4 ip4:159.135.137.168 ip4:159.135.137.175 ip4:159.135.138.235 ip4:159.135.138.236 ip4:159.135.138.237 ip4:159.135.138.238 ip4:159.135.138.239 ip4:159.135.141.254 ip4:159.135.141.255 -all

📨 DMARC

Policy	Record (_dmarc.teoriundervisning.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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)

🔐 DNSSEC282ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026082318
Primary NS (MNAME)	ns1.nhl-data.dk
Responsible (RNAME)	hostmaster@nhl-data.dk
Refresh	10800s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

93ms

A

91ms

MX

85ms

AAAA

84ms

TXT

320ms

CAA

93ms

HTTPS

106ms

TLSA

128ms

SOA

0ms

MTA-STS

115ms

DNSSEC

282ms

SRV

150ms

Total

3448ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-24 12:41:40	3448ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-24 19:24:54	2273ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-20 15:53:37	362ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-20 13:34:54	578ms	4 NS 1 A 1 MX	🔓 Insecure	View
2026-06-18 08:06:47	714ms	4 NS 1 A 1 MX	🔓 Insecure	View