dup.dk

📜 Historical scan 2026-10-09 00:59:53 · ← 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 148ms

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 126ms

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 124ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.250.147.26 2a00:1450:4025:c03::1b	rd-in-f26.1e100.net rc-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.179.20.26 2404:6800:4000:1027::1b	ncboms-in-f26.1e100.net ncboms-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1a	lcdels-in-f27.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1a	mad01s14-in-f27.1e100.net yukulwh-in-f27.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.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 142ms

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 123ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.2.192,172.67.129.148 ech=AEX+DQBBeQAgACCIFva+SPJw91pRq+RpqDJWoq9DwcLqtSX+rsnWB4v/MwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:8194,2606:4700:3035::6815:2c0

📝 TXT Records#

2 records 258ms

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 113ms

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#

193ms

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

🏷️ SOA#

87ms

Field	Value
Serial	2416981088
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 (2500d)

📋 WHOIS#

⏱️ Lookup Timing#

148ms

126ms

124ms

AAAA

142ms

TXT

258ms

CAA

113ms

HTTPS

123ms

TLSA

749ms

SOA

87ms

MTA-STS

129ms

DNSSEC

193ms

SRV

147ms

Total

2330ms

🕐 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 shown	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	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