gdf.dk

📜 Historical scan 2026-06-17 10:16:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

gdf.dk is a .dk domain served by 2 nameservers (ivan.ns.cloudflare.com, janet.ns.cloudflare.com). It was registered on 30 April 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.26.10.180 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, aspmx3.googlemail.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 41ms

Nameserver	IP addresses	PTR	ASN / ISP
ivan.ns.cloudflare.com	108.162.193.120 172.64.33.120 173.245.59.120 2606:4700:58::adf5:3b78 2803:f800:50::6ca2:c178 2a06:98c1:50::ac40:2178	ivan.ns.cloudflare.com ivan.ns.cloudflare.com ivan.ns.cloudflare.com ivan.ns.cloudflare.com ivan.ns.cloudflare.com ivan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
janet.ns.cloudflare.com	108.162.192.169 172.64.32.169 173.245.58.169 2606:4700:50::adf5:3aa9 2803:f800:50::6ca2:c0a9 2a06:98c1:50::ac40:20a9	janet.ns.cloudflare.com janet.ns.cloudflare.com janet.ns.cloudflare.com janet.ns.cloudflare.com janet.ns.cloudflare.com janet.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

3 records 53ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.26.10.180	—	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
104.26.11.180	—	—	AS13335	Cloudflare, Inc.	104.26.0.0/20	—	—
172.67.75.168	—	—	AS13335	Cloudflare, Inc.	172.67.64.0/18	—	—

📧 MX Records#

5 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	—	aspmx.l.google.com	108.177.14.27 2a00:1450:4010:c1e::1a	lt-in-f27.1e100.net lb-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
1	—	aspmx3.googlemail.com	108.177.125.26 2404:6800:4008:c01::1a	tp-in-f26.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	—	alt1.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1b	lcbomp-in-f27.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	—	alt2.aspmx.l.google.com	108.177.125.26 2404:6800:4003:c26::1a	tp-in-f26.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	—	aspmx2.googlemail.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

🔷 AAAA Records (IPv6)#

3 records 68ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:20::681a:ab4	—	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::681a:bb4	—	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—
2606:4700:20::ac43:4ba8	—	—	AS13335	Cloudflare, Inc.	2606:4700:0:0:0:0:0:0/41	—	—

🔐 HTTPS Records#

1 records 64ms

Priority	Target	SvcParams
1 service	.	alpn="h2" ipv4hint=104.26.10.180,104.26.11.180,172.67.75.168 ipv6hint=2606:4700:20::681a:ab4,2606:4700:20::681a:bb4,2606:4700:20::ac43:4ba8

📝 TXT Records#

2 records 219ms

TXT Record
google-site-verification=3-VchqQaA3gwjczy3dLrkXmiQQyegaFn-3sY37Powcs
v=spf1 mx ip4:185.223.26.234 include:sendgrid.net ~all

✉️ SPF#

Policy	Record (gdf.dk)
~all (soft fail)	v=spf1 mx ip4:185.223.26.234 include:sendgrid.net ~all

📨 DMARC#

Policy	Record (_dmarc.gdf.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:acbac897ff1c48f9816a28a2bfc25632@dmarc-reports.cloudflare.net;

📬 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 2026-10-14 04:17:19

www	104.26.10.180 104.26.11.180 172.67.75.168 2606:4700:20::681a:ab4 2606:4700:20::681a:bb4 2606:4700:20::ac43:4ba8 (AS13335) (address records, no CNAME)
www vs bare domain	Same network gdf.dk: 104.26.10.180 104.26.11.180 172.67.75.168 2606:4700:20::681a:ab4 (AS13335) www.gdf.dk: 104.26.10.180 104.26.11.180 172.67.75.168 2606:4700:20::681a:ab4 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
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: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

186ms

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

🏷️ SOA#

55ms

Field	Value
Serial	2407135652
Primary NS (MNAME)	ivan.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 11:39:36

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-04-30
Expires	2031-04-30 (1653d)

🔗 Same registrant#

25 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
aflever.dk	Simply.com A/S
e-study.dk	Simply.com A/S
erdetstudenteruge.dk	Simply.com A/S
godekarakterer.dk	Simply.com A/S
grammatikbog.dk	Punktum dk A/S (direct)
guldnoter.dk	Punktum dk A/S (direct)
gymhjælpen.dk	Simply.com A/S
kildekritik.dk	Simply.com A/S
laerogleg.dk	Simply.com A/S
lektieportal.dk	Simply.com A/S
lærerstuderende.dk	Simply.com A/S
lærogleg.dk	Simply.com A/S
notenet.dk	Simply.com A/S
paedagogstuderende.dk	Simply.com A/S
privatlaerer.dk	Simply.com A/S
rettenøgle.dk	Punktum dk A/S (direct)
schulhilfeverlag.dk	Simply.com A/S
skolehjaelpen.dk	Punktum dk A/S (direct)
srp-bog.dk	Simply.com A/S
srp-bogen.dk	Simply.com A/S
srpbog.dk	Simply.com A/S
studentmedia.dk	Simply.com A/S
studentmediagroup.dk	Simply.com A/S
studieportalen.dk	Punktum dk A/S (direct)
studieweb.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

41ms

53ms

40ms

AAAA

68ms

TXT

219ms

CAA

45ms

HTTPS

64ms

TLSA

231ms

SOA

55ms

MTA-STS

108ms

DNSSEC

186ms

SRV

0ms

Total

3957ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 04:17:18	2672ms	2 NS 3 A 5 MX	🔒 Secure
2026-10-14 04:16:36	679ms	2 NS 3 A 5 MX	🔒 Secure
2026-10-01 17:01:15	3029ms	2 NS 3 A 5 MX	🔒 Secure
2026-09-30 16:46:41	735ms	2 NS 3 A 5 MX	🔒 Secure
2026-09-23 21:59:39	919ms	2 NS 3 A 5 MX	🔒 Secure
2026-09-18 03:03:15	1199ms	2 NS 3 A 5 MX	🔒 Secure
2026-09-11 12:49:27	1249ms	2 NS 3 A 5 MX	🔒 Secure
2026-09-07 11:03:51	775ms	2 NS 3 A 5 MX	🔒 Secure
2026-08-28 09:16:22	2089ms	2 NS 3 A 5 MX	🔒 Secure
2026-08-26 21:40:10	765ms	2 NS 3 A 5 MX	🔒 Secure
2026-08-06 15:44:12	1582ms	2 NS 3 A 5 MX	🔒 Secure
2026-07-28 18:28:46	1491ms	2 NS 3 A 5 MX	🔒 Secure
2026-07-17 12:05:29	1321ms	2 NS 3 A 5 MX	🔒 Secure
2026-07-09 21:33:59	1278ms	2 NS 3 A 5 MX	🔒 Secure
2026-07-03 13:38:21	1370ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-27 05:26:39	932ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-26 08:35:22	2220ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-24 14:56:22	2424ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-21 09:33:12	2826ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-19 08:55:37	1170ms	2 NS 3 A 5 MX	🔒 Secure
2026-06-17 10:16:49 shown	3957ms	2 NS 3 A 5 MX	🔒 Secure