derfor.dk

📜 Historical scan 2026-07-16 23:33:20 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

derfor.dk is a .dk domain served by 2 nameservers (imani.ns.cloudflare.com, kianchau.ns.cloudflare.com). It was registered on 11 December 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.31.96 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 5 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 30ms

Nameserver	IP addresses	PTR	ASN / ISP
imani.ns.cloudflare.com	108.162.194.62 162.159.38.62 172.64.34.62 2606:4700:50::a29f:263e 2803:f800:50::6ca2:c23e 2a06:98c1:50::ac40:223e	imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kianchau.ns.cloudflare.com	108.162.195.179 162.159.44.179 172.64.35.179 2606:4700:58::a29f:2cb3 2803:f800:50::6ca2:c3b3 2a06:98c1:50::ac40:23b3	kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.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 51ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.31.96	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.176.46	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

7 records 32ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	43200s	aspmx.l.google.com	209.85.233.26 2a00:1450:4010:c07::1b 2a00:1450:4010:c07::1b	lr-in-f26.1e100.net lf-in-x1b.1e100.net lf-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	43200s	alt1.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
5	43200s	alt2.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx2.googlemail.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	43200s	aspmx3.googlemail.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx4.googlemail.com	108.177.125.27 2404:6800:4008:c01::1a	tp-in-f27.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx5.googlemail.com	192.178.230.26 2404:6800:400b:c01b::1a	yunrtab-in-f26.1e100.net yunrtab-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.21.31.96
🔶 Autoconfig	104.21.31.96

🔷 AAAA Records (IPv6)#

2 records 50ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3037::6815:1f60	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:b02e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 35ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.31.96,172.67.176.46 ech=AEX+DQBB6wAgACAPL1XAqgtdgmLAB/Y6aVEP8Hft4edI+e5+G0thDIrtKgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3037::6815:1f60,2606:4700:3037::ac43:b02e

📝 TXT Records#

4 records 250ms

TXT Record
google-site-verification=1nFo3sFf_62hcsEnb92vT3Z9baG_aoKXRsieqKlTZIQ
google-site-verification=oTTP2cu3yfWgaLK9w1_E9FyK6wu9eQMHgiUmyUxDJZA
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhWJDkvqtYmZq19EA1Z4yUKnj36H/W7pfmBBwSkRPUAVjOX+G2hat1CH+MASwmKVxwhQxGRT4fRmfvPVzrp/wDA/ZxMo09fe08UVo2tW6Q/uE++zSikDTYgQLGubHLM1wcFjrcDBaCEVkkXaXscoqZfHcZn9mB4h4oclHP2d10rQIDAQAB
v=spf1 include:_spf.google.com ~all

✉️ SPF#

Policy	Record (derfor.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.derfor.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc-reports@derfor.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

10 records 47ms

Flags	Tag	Value
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 2026-10-14 04:25:01

www	104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335) (address records, no CNAME)
www vs bare domain	Same network derfor.dk: 104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335) www.derfor.dk: 104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335)
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

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.derfor.dk	Qyybh423CzF5ZGob3kcXo_B1mGmWvM2FdMhDaQg0QHw

🔗 TLSA / DANE#

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

🔐 DNSSEC#

9061ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2409676979
Primary NS (MNAME)	imani.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-11 00:25:31

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2004-12-11
Expires	2031-12-31 (1901d)

📋 WHOIS#

⏱️ Lookup Timing#

30ms

51ms

32ms

AAAA

50ms

TXT

250ms

CAA

47ms

HTTPS

35ms

TLSA

65ms

SOA

0ms

MTA-STS

53ms

DNSSEC

9061ms

SRV

85ms

Total

10672ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 04:25:01	3456ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-13 03:46:34	1710ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-12 02:49:33	2725ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-10 23:59:44	749ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-26 17:06:51	1209ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-14 11:04:27	2719ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-08 05:54:42	2307ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-27 05:44:50	2103ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-19 23:22:13	14352ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-16 10:12:44	5760ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-12 06:02:38	10802ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-10 03:31:31	10887ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-29 18:08:48	3939ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-22 05:14:52	1968ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-16 23:33:20 shown	10672ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-09 01:32:07	10213ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-03 11:10:59	1143ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-25 18:52:32	1065ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-19 12:54:26	2622ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-17 02:05:55	943ms	2 NS 2 A 7 MX	🔒 Secure