flexnu.dk

📜 Historical scan 2026-07-18 10:31:17 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

flexnu.dk is a .dk domain served by 2 nameservers (byron.ns.cloudflare.com, ursula.ns.cloudflare.com). It was registered on 6 February 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.26.10.10 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by flexnu-dk.mail.protection.outlook.com. The zone is of unknown DNSSEC status, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 41ms

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 Records#

3 records 45ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.26.10.10	300s	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
104.26.11.10	300s	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
172.67.69.17	300s	—	AS13335	Cloudflare, Inc.	172.67.64.0/18	—	—

📧 MX Records#

1 records 49ms

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::7 2a01:111:f403:ca09::1 2a01:111:f403:ca09::3 52.101.68.12 52.101.68.36 52.101.73.12 52.101.73.26	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as9pr05cu01302.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 → 52.98.149.184

🔷 AAAA Records (IPv6)#

3 records 48ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:20::681a:a0a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::681a:b0a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::ac43:4511	300s	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—

🔐 HTTPS Records#

1 records 43ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.26.10.10,104.26.11.10,172.67.69.17 ipv6hint=2606:4700:20::681a:a0a,2606:4700:20::681a:b0a,2606:4700:20::ac43:4511

📝 TXT Records#

3 records 207ms

TXT Record
google-site-verification=PzEjmQbbU3IQsa9f27GhwC_gN2btLgjcqLGuoJKmz2I
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 Records#

11 records 44ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-15 10:48:10

www CNAME	989151ff894d6797.vercel-dns-016.com (all on vercel-dns-016.com) → 216.150.1.1 216.150.16.1 (AS16509)
www vs bare domain	Different networks flexnu.dk: 104.26.10.10 104.26.11.10 172.67.69.17 2606:4700:20::681a:a0a (AS13335) www.flexnu.dk: 216.150.1.1 216.150.16.1 (AS16509) (all like this)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-flexnu-dk._domainkey.keytondk.a-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-flexnu-dk._domainkey.keytondk.a-v1.dkim.mail.microsoft	RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

127ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	broken trust chain resolving 'flexnu.dk/DNSKEY/IN': 127.0.0.1#53

🏷️ SOA#

0ms

Field	Value
Serial	2409761832
Primary NS (MNAME)	byron.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-15 03:31:42

Field	Value
Registrar	ONE.COM A/S
Registered	2026-02-06
Expires	2027-02-05 (111d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
findtilladelser.dk	ONE.COM A/S
ymg.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

41ms

45ms

49ms

AAAA

48ms

TXT

207ms

CAA

44ms

HTTPS

43ms

TLSA

140ms

SOA

0ms

MTA-STS

89ms

DNSSEC

127ms

SRV

256ms

Total

9798ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 10:48:10	1376ms	2 NS 3 A 1 MX	🔓 Insecure
2026-10-05 23:19:30	1585ms	2 NS 3 A 1 MX	🔓 Insecure
2026-09-23 19:53:12	1834ms	2 NS 3 A 1 MX	🔓 Insecure
2026-09-18 14:33:30	1968ms	2 NS 3 A 1 MX	🔓 Insecure
2026-09-15 01:18:33	2191ms	2 NS 3 A 1 MX	🔓 Insecure
2026-09-12 12:00:11	11300ms	2 NS 3 A 1 MX	🔓 Insecure
2026-08-28 07:33:54	1284ms	2 NS 3 A 1 MX	🔓 Insecure
2026-08-27 15:55:40	1166ms	2 NS 3 A 1 MX	🔓 Insecure
2026-08-26 14:36:00	1604ms	2 NS 3 A 1 MX	🔓 Insecure
2026-08-14 01:08:38	7627ms	2 NS 3 A 1 MX	🔓 Insecure
2026-08-07 13:03:23	3458ms	2 NS 3 A 1 MX	🔓 Insecure
2026-07-31 14:37:14	17417ms	2 NS 3 A 1 MX	🔓 Insecure
2026-07-18 10:31:17 shown	9798ms	2 NS 3 A 1 MX	❓ Unknown
2026-07-13 22:19:09	10470ms	2 NS 3 A 1 MX	🔓 Insecure
2026-07-08 16:42:51	3712ms	2 NS 3 A 1 MX	🔓 Insecure
2026-07-06 13:33:20	7536ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-01 21:55:44	5390ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 11:25:26	1307ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-25 17:47:29	966ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-17 09:25:50	1070ms	2 NS 1 A 1 MX	🔓 Insecure