dup.dk

📜 Historical scan 2026-06-17 05:01:03 · ← 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 38ms

Nameserver	IP addresses	PTR	ASN / ISP
maisie.ns.cloudflare.com	—	—	—
tadeo.ns.cloudflare.com	—	—	—

🌍 A Records#

2 records 46ms

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

📧 MX Records#

5 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	—	aspmx.l.google.com	64.233.165.26	lg-in-f26.1e100.net	AS15169 Google LLC
5	—	alt1.aspmx.l.google.com	172.253.158.27	so-in-f27.1e100.net	AS15169 Google LLC
5	—	alt2.aspmx.l.google.com	172.253.158.26	so-in-f26.1e100.net	AS15169 Google LLC
10	—	alt3.aspmx.l.google.com	172.253.158.26	so-in-f26.1e100.net	AS15169 Google LLC
10	—	alt4.aspmx.l.google.com	192.178.230.27	yunrtab-in-f27.1e100.net	AS15169 Google LLC

🔷 AAAA Records (IPv6)#

2 records 46ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:8194	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:2c0	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 45ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.2.192,172.67.129.148 ech=AEX+DQBBTgAgACBkv//ZxP4Vaum9fERkUVoG+f/WeY8RgzuorCx9S5g9PgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:8194,2606:4700:3036::6815:2c0

📝 TXT Records#

2 records 251ms

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 46ms

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#

187ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2406651229
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 (2503d)

📋 WHOIS#

⏱️ Lookup Timing#

38ms

46ms

AAAA

46ms

TXT

251ms

CAA

46ms

HTTPS

45ms

TLSA

106ms

SOA

48ms

MTA-STS

49ms

DNSSEC

187ms

SRV

0ms

Total

1565ms

🕐 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	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 shown	1565ms	2 NS 2 A 5 MX	🔒 Secure