x400.dk

📜 Historical scan 2026-06-25 14:48:26 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

x400.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 11 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by x400-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 70ms

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#

🌍

No A records found

📧 MX Records#

1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	x400-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::a 2a01:111:f403:ca04::c 2a01:111:f403:ca09::5 52.101.68.27 52.101.73.12 52.101.73.28 52.101.73.6	mail-du2pr03cu00102.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am7pr05cu00204.inbound.protection.outlook.com mail-am6pr04cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.151.88

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 82ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

4 records 208ms

TXT Record
MS=ms64205839
rhkokhfpmd5of7ka9tj42oclpk
SGLg/yVs38y1ncNhDgUAgUp+bbhiDengJPba+7ex/FTZtjOg2/XO0DLZMlq82Dv3bGX0/FmwxvNNOn8rasySnw==
v=spf1 ip4:85.218.153.165 include:spf.protection.outlook.com include:spf-b.saxobank.com -all

✉️ SPF#

Policy	Record (x400.dk)
-all (hard fail)	v=spf1 ip4:85.218.153.165 include:spf.protection.outlook.com include:spf-b.saxobank.com -all

📨 DMARC#

Policy	Record (_dmarc.x400.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#

latest probe, not this scan · checked 2026-10-10 22:43:51

www	46.30.211.38 (AS51468) (address records, no CNAME)
www vs bare domain	Only www resolves x400.dk: no address www.x400.dk: 46.30.211.38 (AS51468) (all like this)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u42426164.wl165.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u42426164.wl165.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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

73ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

48ms

Field	Value
Serial	2026062401
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 2026-10-20 09:07:42

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2017-02-11
Expires	2027-02-28 (131d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

70ms

68ms

38ms

AAAA

67ms

TXT

208ms

CAA

68ms

HTTPS

66ms

TLSA

1050ms

SOA

48ms

MTA-STS

77ms

DNSSEC

73ms

SRV

82ms

Total

1638ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 15:39:06	1549ms	2 NS 0 A 1 MX	🔒 Secure
2026-09-26 04:13:32	766ms	2 NS 0 A 1 MX	🔒 Secure
2026-09-21 16:16:57	1828ms	2 NS 0 A 1 MX	🔒 Secure
2026-08-27 20:48:29	775ms	2 NS 0 A 1 MX	🔒 Secure
2026-08-25 22:59:40	1894ms	2 NS 0 A 1 MX	🔒 Secure
2026-08-17 02:24:48	5340ms	2 NS 0 A 1 MX	🔒 Secure
2026-07-25 19:28:16	1792ms	2 NS 0 A 1 MX	🔒 Secure
2026-06-25 14:48:26 shown	1638ms	2 NS 0 A 1 MX	🔒 Secure
2026-06-19 21:52:54	979ms	2 NS 0 A 1 MX	🔒 Secure
2026-06-17 13:58:25	5915ms	2 NS 0 A 1 MX	🔒 Secure