fsck.dk

Records from scan: 2026-10-05 23:30:26 · 1313ms total · last checked 2026-10-27 03:33 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

fsck.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 29 April 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 3.125.146.6 is hosted by Amazon.com, Inc. (AS16509) in Germany. 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 has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 32ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 40ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
3.125.146.6	43200s	ec2-3-125-146-6.eu-central-1.compute.amazonaws.com	AS16509	Amazon.com, Inc.	3.96.0.0/11	🇩🇪 Germany	Frankfurt am Main

📧 MX Records#

5 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	43200s	aspmx.l.google.com	108.177.14.26 2a00:1450:4010:c03::1a 2a00:1450:4010:c03::1a	lt-in-f26.1e100.net lr-in-f26.1e100.net lr-in-x1a.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	43200s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	43200s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1a	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	43200s	alt3.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
10	43200s	alt4.aspmx.l.google.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

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	fsck.dk → 3.125.146.6
🔶 Autoconfig	fsck.dk → 3.125.146.6

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 139ms

TXT Record
google-site-verification=cSwyJJ2ethk59-DGMKJ2TfW5uLVIr-EUdtlNihUWzo0
v=spf1 include:_spf.google.com ~all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.fsck.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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#

checked 2026-10-11 11:51:39

www CNAME	fsck.dk (all on fsck.dk) → 3.125.146.6 (AS16509)
www vs bare domain	Same network fsck.dk: 3.125.146.6 (AS16509) www.fsck.dk: 3.125.146.6 (AS16509)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

3 found

Selector	CNAME	Key
google	—	RSA · ~2048 bit
s1	s1.domainkey.u56015248.wl249.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u56015248.wl249.sendgrid.net	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

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.fsck.dk	fsck.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

106ms

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

🏷️ SOA#

46ms

Field	Value
Serial	2026100501
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-09 10:26:50

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2000-04-29
Expires	2027-06-30 (245d)

📋 WHOIS#

⏱️ Lookup Timing#

32ms

40ms

38ms

AAAA

38ms

TXT

139ms

CAA

40ms

HTTPS

38ms

TLSA

123ms

SOA

46ms

MTA-STS

46ms

DNSSEC

106ms

SRV

49ms

Total

1313ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 23:30:26 shown	1313ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-29 23:01:47	722ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-26 06:27:19	816ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-04 11:40:49	888ms	2 NS 1 A 5 MX	🔒 Secure
2026-08-30 01:50:16	1258ms	2 NS 1 A 5 MX	🔒 Secure
2026-08-24 23:44:21	941ms	2 NS 1 A 5 MX	🔒 Secure
2026-08-05 08:02:06	1323ms	2 NS 1 A 5 MX	🔒 Secure
2026-07-29 06:13:32	7289ms	2 NS 1 A 5 MX	🔒 Secure
2026-07-05 20:00:03	25744ms	2 NS 1 A 5 MX	🔒 Secure
2026-07-02 00:55:11	1081ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-17 09:52:32	727ms	2 NS 1 A 5 MX	🔒 Secure