matematiktræning.dk DNS records

🖥️ Nameservers2 records 33ms

Nameserver	IP addresses	PTR	ASN / ISP
cortney.ns.cloudflare.com	108.162.192.87 172.64.32.87 173.245.58.87 2606:4700:50::adf5:3a57 2803:f800:50::6ca2:c057 2a06:98c1:50::ac40:2057	cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
eric.ns.cloudflare.com	108.162.193.112 172.64.33.112 173.245.59.112 2606:4700:58::adf5:3b70 2803:f800:50::6ca2:c170 2a06:98c1:50::ac40:2170	eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records4 records 64ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
18.173.5.20	60s	server-18-173-5-20.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	18.173.0.0/21	🇺🇸 United States	—
18.173.5.50	60s	server-18-173-5-50.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	18.173.0.0/21	🇺🇸 United States	—
18.173.5.67	60s	server-18-173-5-67.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	18.173.0.0/21	🇺🇸 United States	—
18.173.5.98	60s	server-18-173-5-98.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	18.173.0.0/21	🇺🇸 United States	—

📧 MX Records1 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	alinea-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::9 2a01:111:f403:ca09:: 2a01:111:f403:ca09::8 52.101.68.27 52.101.68.36 52.101.68.39 52.101.73.8	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-am0pr04cu00500.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)8 records 54ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2600:9000:2574:1e00:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:3000:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:3800:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:8000:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:b800:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:c200:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:ce00:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:2574:e400:1f:83b1:83c0:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—

🔐 HTTPS Records1 records 50ms

Priority	Target	SvcParams
1 service	.	alpn="h2"

📝 TXT Records17 records 209ms

TXT Record
202107230656073ple1u2lacs20rzzf5m8d3gpspmj9l1hlicdfuv68x4zx87awc
amazonses:+nvRC8ri1xQhAu7XuMPBMFRMAy9UejDBsikJHTK8tWs=
amazonses:j+3GPrPCmOsjFdiJ08oduYqHU4jrj9BfDdBJMj0E7vU=
asv=472d20b56e7d03af04a8a11ccf132cfe
eefu7uvlbpn556fcpeum8n8h4u
facebook-domain-verification=blfuq39udl63ysvjzs403xkho49f9g
fajb3ptkvdo7uu5kp8kia7vg4a
google-site-verification=5M0-Tf98s5KL5x4V1ulKXRRdqaozs0wmJhDNY3wJEuc
google-site-verification=EjgOsZEWzoURiNqOABg5KMsndnqkQ4XgfMen5Q3g8v0
google-site-verification=kf7_x2zTEyDeloLO-2-Dn5UvWc-UK_blYvIMpUXhPTA
google-site-verification=sCaNbt8WoMn-b6Z_swdOiTz5l4uP5hUSresv2gn80bU
google-site-verification=u0UFsdGHmTV6Ixm5Wx8Oae9zea0AdsUMuUCEvo_irng
j9b6csvk1i2l4lj3l8l6ui3pqh
mouve26tlld9drao4phct1qnoc
MS=ms48016087
s9dpvvkjduia2bu4v2n22cm6ep
v=spf1 mx ip4:167.89.108.1 ip4:167.89.108.13 ip4:167.89.92.35 ip4:199.7.202.99 ip4:193.3.130.30 ip4:54.76.140.170 ip4:91.215.162.0/24 include:mail.zendesk.com include:spf1.egmont.com include:spf.mandrillapp.com include:spf.dixa.io include:25645903.spf01.hubspotemail.net -all

✉️ SPF

Policy	Record (matematiktræning.dk)
-all (hard fail)	v=spf1 mx ip4:167.89.108.1 ip4:167.89.108.13 ip4:167.89.92.35 ip4:199.7.202.99 ip4:193.3.130.30 ip4:54.76.140.170 ip4:91.215.162.0/24 include:mail.zendesk.com include:spf1.egmont.com include:spf.mandrillapp.com include:spf.dixa.io include:25645903.spf01.hubspotemail.net -all

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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)

🔐 DNSSEC137ms

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	2410273457
Primary NS (MNAME)	cortney.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

33ms

A

64ms

MX

35ms

AAAA

54ms

TXT

209ms

CAA

38ms

HTTPS

50ms

TLSA

1124ms

SOA

0ms

MTA-STS

56ms

DNSSEC

137ms

SRV

44ms

Total

2874ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-07-24 03:02:06	2874ms	2 NS 4 A 1 MX	🔓 Insecure	View
2026-07-13 08:45:38	1653ms	2 NS 4 A 1 MX	🔓 Insecure	View
2026-06-26 23:02:03	4759ms	2 NS 4 A 1 MX	❓ Unknown	View
2026-06-23 12:13:54	5637ms	2 NS 4 A 1 MX	❓ Unknown	View
2026-06-22 13:24:17	996ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 12:11:01	3560ms	2 NS 4 A 1 MX	🔒 Secure	View