t-byg.dk

📜 Historical scan 2026-10-03 16:25:54 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

t-byg.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 24 October 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.47.247.18 is hosted by One.com A/S (AS51468). Mail is handled by tbyg-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 33ms

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 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.47.247.18	3600s	one.com.webforward.g1i.one	AS51468	One.com A/S	195.47.247.0/24	—	—

📧 MX Records#

1 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	tbyg-dk0c.mail.protection.outlook.com	2a01:111:f403:ca09::20 2a01:111:f403:ca21::c 2a01:111:f403:ca38::8 2a01:111:f403:ca38::a 52.101.103.140 52.101.68.15 52.101.68.21 52.101.73.145	mail-as8pr05cu00400.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-wa4pr05cu00102.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-am6pr02cu00301.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 → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 145ms

TXT Record
MS=ms94660456
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (t-byg.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 2026-10-27 02:28:26

www	46.30.215.177 2a02:2350:5:106:808c:96a1:62c9:f4a8 (AS51468) (address records, no CNAME)
www vs bare domain	Same network t-byg.dk: 195.47.247.18 (AS51468) www.t-byg.dk: 46.30.215.177 2a02:2350:5:106:808c:96a1:62c9:f4a8 (AS51468)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
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#

52ms

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

🏷️ SOA#

19ms

Field	Value
Serial	2026090401
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 2026-10-27 02:53:48

Field	Value
Registrar	ONE.COM A/S
Registered	2019-10-24
Expires	2026-10-31 (4d)

🔗 Same registrant#

3 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
bsinvest.dk	ONE.COM A/S
t-el.dk	Punktum dk A/S (direct)
t-energi.dk	ONE.COM A/S

📋 WHOIS#

⏱️ Lookup Timing#

33ms

38ms

39ms

AAAA

36ms

TXT

145ms

CAA

37ms

HTTPS

36ms

TLSA

636ms

SOA

19ms

MTA-STS

44ms

DNSSEC

52ms

SRV

66ms

Total

970ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-27 02:28:26	682ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-20 16:43:36	471ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-06 18:26:49	898ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-03 16:25:54 shown	970ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-05 20:52:38	661ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 01:36:12	867ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-21 16:59:03	7529ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-07 09:18:30	1616ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 23:44:20	1351ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 00:29:19	3459ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 00:10:33	3465ms	2 NS 1 A 1 MX	🔒 Secure