flexnu.dk DNS records

🖥️ Nameservers2 records 38ms

Nameserver	IP addresses	PTR	ASN / ISP
byron.ns.cloudflare.com	108.162.195.67 162.159.44.67 172.64.35.67 2606:4700:58::a29f:2c43 2803:f800:50::6ca2:c343 2a06:98c1:50::ac40:2343	byron.ns.cloudflare.com byron.ns.cloudflare.com byron.ns.cloudflare.com byron.ns.cloudflare.com byron.ns.cloudflare.com byron.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
ursula.ns.cloudflare.com	108.162.194.191 162.159.38.191 172.64.34.191 2606:4700:50::a29f:26bf 2803:f800:50::6ca2:c2bf 2a06:98c1:50::ac40:22bf	ursula.ns.cloudflare.com ursula.ns.cloudflare.com ursula.ns.cloudflare.com ursula.ns.cloudflare.com ursula.ns.cloudflare.com ursula.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records1 records 35ms

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 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	flexnu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::8 2a01:111:f403:ca04::b 2a01:111:f403:ca04::e 52.101.68.15 52.101.68.16 52.101.68.36 52.101.73.19	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-db8pr02cu00106.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-as8pr04cu00803.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

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.154.136

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 182ms

TXT Record
MS=ms43221920
v=spf1 include:spf.protection.outlook.com include:amazonses.com include:send.flexnu.dk ~all

✉️ SPF

Policy	Record (flexnu.dk)
~all (soft fail)	v=spf1 include:spf.protection.outlook.com include:amazonses.com include:send.flexnu.dk ~all

📨 DMARC

Policy	Record (_dmarc.flexnu.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 Records11 records 58ms

Flags	Tag	Value
0	iodef	mailto:aa@keyton.dk
0	issue	comodoca.com
0	issue	digicert.com; cansignhttpexchanges=yes
0	issue	letsencrypt.org
0	issue	pki.goog; cansignhttpexchanges=yes
0	issue	ssl.com
0	issuewild	comodoca.com
0	issuewild	digicert.com; cansignhttpexchanges=yes
0	issuewild	letsencrypt.org
0	issuewild	pki.goog; cansignhttpexchanges=yes
0	issuewild	ssl.com

🔗 TLSA / DANE

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

🔐 DNSSEC141ms

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

🏷️ SOA0ms

Field	Value
Serial	2408037915
Primary NS (MNAME)	byron.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

38ms

A

35ms

MX

44ms

AAAA

53ms

TXT

182ms

CAA

58ms

HTTPS

40ms

TLSA

217ms

SOA

0ms

MTA-STS

61ms

DNSSEC

141ms

SRV

87ms

Total

1307ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 07:33:54	1284ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-08-27 15:55:40	1166ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-08-26 14:36:00	1604ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-08-14 01:08:38	7627ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-08-07 13:03:23	3458ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-07-31 14:37:14	17417ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-07-18 10:31:17	9798ms	2 NS 3 A 1 MX	❓ Unknown	View
2026-07-13 22:19:09	10470ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-07-08 16:42:51	3712ms	2 NS 3 A 1 MX	🔓 Insecure	View
2026-07-06 13:33:20	7536ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-07-01 21:55:44	5390ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-27 11:25:26	1307ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-25 17:47:29	966ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-17 09:25:50	1070ms	2 NS 1 A 1 MX	🔓 Insecure	View