udacity.dk

📜 Historical scan 2026-08-20 14:30:52 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

udacity.dk is a .dk domain served by 2 nameservers (ingrid.ns.cloudflare.com, kai.ns.cloudflare.com). It was registered on 14 November 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.15.49 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. The zone is not DNSSEC-signed, 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 282ms

Nameserver	IP addresses	PTR	ASN / ISP
ingrid.ns.cloudflare.com	108.162.192.165 172.64.32.165 173.245.58.165 2606:4700:50::adf5:3aa5 2803:f800:50::6ca2:c0a5 2a06:98c1:50::ac40:20a5	ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kai.ns.cloudflare.com	108.162.193.188 172.64.33.188 173.245.59.188 2606:4700:58::adf5:3bbc 2803:f800:50::6ca2:c1bc 2a06:98c1:50::ac40:21bc	kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 215ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.15.49	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.161.178	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 210ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

2 records 290ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:a1b2	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:f31	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 304ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.15.49,172.67.161.178 ech=AEX+DQBB6AAgACAwsc0hfuR6HiPPTqS0Gwbxm8sB/0+sgsSQ8FIOLF1vQQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:a1b2,2606:4700:3036::6815:f31

📝 TXT Records#

1 records 648ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (udacity.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.udacity.dk)
p=reject	v=DMARC1; p=reject; rua=; ruf=;

📬 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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-19 03:58:07

www	NXDOMAIN
www vs bare domain	www does not resolve udacity.dk: 104.21.15.49 172.67.161.178 2606:4700:3033::ac43:a1b2 2606:4700:3036::6815:f31 (AS13335) www.udacity.dk: no address (all like this)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

469ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2412701011
Primary NS (MNAME)	ingrid.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-20 04:47:32

Field	Value
Registrar	MarkMonitor Inc.
Registered	2013-11-14
Expires	2026-11-30 (41d)

🔗 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
nanodegree.dk	MarkMonitor Inc.
nanodegrees.dk	MarkMonitor Inc.

📋 WHOIS#

⏱️ Lookup Timing#

282ms

215ms

210ms

AAAA

290ms

TXT

648ms

CAA

275ms

HTTPS

304ms

TLSA

230ms

SOA

0ms

MTA-STS

335ms

DNSSEC

469ms

SRV

330ms

Total

6481ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-19 03:58:07	2617ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-27 06:05:13	1031ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-09 01:47:46	1847ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-20 14:30:52 shown	6481ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-03 04:58:46	843ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-24 22:42:44	784ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-22 08:01:27	3257ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 13:53:09	2643ms	2 NS 2 A 0 MX	🔓 Insecure