dup.dk

📜 Historical scan 2026-08-11 06:29:53 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dup.dk is a .dk domain served by 2 nameservers (maisie.ns.cloudflare.com, tadeo.ns.cloudflare.com). It was registered on 27 August 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.2.192 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is DNSSEC-signed and validates, 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 172ms

Nameserver	IP addresses	PTR	ASN / ISP
maisie.ns.cloudflare.com	108.162.194.89 162.159.38.89 172.64.34.89 2606:4700:50::a29f:2659 2803:f800:50::6ca2:c259 2a06:98c1:50::ac40:2259	maisie.ns.cloudflare.com maisie.ns.cloudflare.com maisie.ns.cloudflare.com maisie.ns.cloudflare.com maisie.ns.cloudflare.com maisie.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
tadeo.ns.cloudflare.com	108.162.195.197 162.159.44.197 172.64.35.197 2606:4700:58::a29f:2cc5 2803:f800:50::6ca2:c3c5 2a06:98c1:50::ac40:23c5	tadeo.ns.cloudflare.com tadeo.ns.cloudflare.com tadeo.ns.cloudflare.com tadeo.ns.cloudflare.com tadeo.ns.cloudflare.com tadeo.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 236ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.2.192	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.129.148	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

5 records 171ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.251.127.27 2a00:1450:4001:c21::1a	lcfrai-in-f27.1e100.net lcfrai-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	142.250.147.27 2a00:1450:4025:c01::1a	rd-in-f27.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	172.253.152.26 2a00:1450:4010:c22::1a	yulpptr-in-f26.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1a	lcbomp-in-f27.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	213.32.244.49
🔶 Autoconfig	213.32.244.49

🔷 AAAA Records (IPv6)#

2 records 151ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::ac43:8194	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:2c0	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 214ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.2.192,172.67.129.148 ech=AEX+DQBBJAAgACC+zRqtYyb8M+l5xwOMcxnCDKmzJHZ34NfqtEW4JoSfVAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:8194,2606:4700:3035::6815:2c0

📝 TXT Records#

2 records 539ms

TXT Record
google-site-verification=RUda63CFhSckxpvApoLHPz3_6rKfdNmINUQRotvdrOw
v=spf1 include:_spf.google.com -all

✉️ SPF#

Policy	Record (dup.dk)
-all (hard fail)	v=spf1 include:_spf.google.com -all

📨 DMARC#

Policy	Record (_dmarc.dup.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:ec8550e2077b4e03b4cd2255911b2fbd@dmarc-reports.cloudflare.net; rf=afrf; pct=100;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

11 records 242ms

Flags	Tag	Value
0	iodef	mailto:henrik@gpsleg.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 2026-10-10 02:31:12

www	213.32.244.49 (AS203953) (address records, no CNAME)
www vs bare domain	Different networks dup.dk: 104.21.2.192 172.67.129.148 2606:4700:3034::ac43:8194 2606:4700:3035::6815:2c0 (AS13335) www.dup.dk: 213.32.244.49 (AS203953) (all like this)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
google	—	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

317ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2411804745
Primary NS (MNAME)	maisie.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-14 18:16:12

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-08-27
Expires	2033-08-31 (2502d)

📋 WHOIS#

⏱️ Lookup Timing#

172ms

236ms

171ms

AAAA

151ms

TXT

539ms

CAA

242ms

HTTPS

214ms

TLSA

399ms

SOA

0ms

MTA-STS

248ms

DNSSEC

317ms

SRV

283ms

Total

3896ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 02:31:12	3377ms	2 NS 2 A 5 MX	🔒 Secure
2026-10-09 00:59:53	2330ms	2 NS 2 A 5 MX	🔒 Secure
2026-10-04 20:26:40	807ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-30 20:15:22	770ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-29 16:15:46	709ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-27 01:59:02	1438ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-22 18:16:09	10435ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-18 11:24:24	1053ms	2 NS 2 A 5 MX	🔒 Secure
2026-09-01 01:55:56	3549ms	2 NS 2 A 5 MX	🔒 Secure
2026-08-22 18:11:59	17747ms	2 NS 2 A 5 MX	🔒 Secure
2026-08-11 06:29:53 shown	3896ms	2 NS 2 A 5 MX	🔒 Secure
2026-08-07 07:57:05	1622ms	2 NS 2 A 5 MX	🔒 Secure
2026-08-02 04:38:35	1723ms	2 NS 2 A 5 MX	🔒 Secure
2026-07-05 18:52:56	2341ms	2 NS 2 A 5 MX	🔒 Secure
2026-06-19 13:11:49	14200ms	2 NS 2 A 5 MX	🔒 Secure
2026-06-17 05:15:51	18436ms	2 NS 2 A 5 MX	🔒 Secure
2026-06-17 05:07:15	3208ms	2 NS 2 A 5 MX	⚠️ Bogus
2026-06-17 05:04:21	937ms	2 NS 2 A 5 MX	🔒 Secure
2026-06-17 05:01:03	1565ms	2 NS 2 A 5 MX	🔒 Secure