f-construction.dk

📜 Historical scan 2026-10-12 02:53:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

f-construction.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 18 April 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.221.196.224 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by fconstruction-dk0c.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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 36ms

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 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
91.221.196.224	3600s	—	AS51468	One.com A/S	91.221.196.0/23	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 30ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	fconstruction-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04::f 2a01:111:f403:ca09::20 2a01:111:f403:ca09::28 2a01:111:f403:ca48::c 52.101.68.27 52.101.68.29 52.101.91.153 52.101.91.162	mail-db7pr03cu00507.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-matpr04cu00101.inbound.protection.outlook.com mail-matpr04cu00302.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 → 52.98.154.136
🔶 Autoconfig	91.221.196.224

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 88ms

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

📝 TXT Records#

2 records 155ms

TXT Record
MS=ms63822287
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (f-construction.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-18 07:21:38

www	91.221.196.224 (AS51468) (address records, no CNAME)
www vs bare domain	Same network f-construction.dk: 91.221.196.224 (AS51468) www.f-construction.dk: 91.221.196.224 (AS51468)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 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#

106ms

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

🏷️ SOA#

32ms

Field	Value
Serial	2026101101
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 2026-10-12 03:03:56

Field	Value
Registrar	ONE.COM A/S
Registered	2020-04-18
Expires	2028-04-30 (560d)

🔗 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#

36ms

30ms

AAAA

37ms

TXT

155ms

CAA

35ms

HTTPS

35ms

TLSA

780ms

SOA

32ms

MTA-STS

59ms

DNSSEC

106ms

SRV

88ms

Total

1428ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-18 07:21:38	1071ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-12 02:53:48 shown	1428ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-03 12:23:48	943ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-01 03:03:19	1392ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-15 12:42:22	1353ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 21:54:04	888ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 04:18:43	1323ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-14 16:09:27	1953ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-14 15:34:27	10375ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-02 00:46:10	836ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 09:09:51	1387ms	2 NS 1 A 1 MX	🔒 Secure