ktbyg.dk

Records from scan: 2026-10-13 21:06:13 · 2600ms total · last checked 2026-10-19 02:02 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ktbyg.dk is a .dk domain served by 2 nameservers (ada.ns.cloudflare.com, tom.ns.cloudflare.com). It was registered on 26 February 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.79.48 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by ktbyg-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 40ms

Nameserver	IP addresses	PTR	ASN / ISP
ada.ns.cloudflare.com	108.162.192.54 172.64.32.54 173.245.58.54 2606:4700:50::adf5:3a36 2803:f800:50::6ca2:c036 2a06:98c1:50::ac40:2036	ada.ns.cloudflare.com ada.ns.cloudflare.com ada.ns.cloudflare.com ada.ns.cloudflare.com ada.ns.cloudflare.com ada.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
tom.ns.cloudflare.com	108.162.193.147 172.64.33.147 173.245.59.147 2606:4700:58::adf5:3b93 2803:f800:50::6ca2:c193 2a06:98c1:50::ac40:2193	tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.79.48	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.142.4	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	ktbyg-dk.mail.protection.outlook.com	2a01:111:f403:ca04::b 2a01:111:f403:ca04::d 2a01:111:f403:ca09::20 2a01:111:f403:ca21::e 52.101.103.39 52.101.181.153 52.101.185.21 52.101.68.39	mail-dbbpr03cu00103.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-matpr04cu00306.inbound.protection.outlook.com mail-miypr05cu00207.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-db7pr03cu00607.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

2 records 32ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:8e04	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:4f30	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 46ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.79.48,172.67.142.4 ech=AEX+DQBBRwAgACBa5pJ9ggD44siUUMenDvOC+TAO226ge+8xLI0J9SSndAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:8e04,2606:4700:3037::6815:4f30

🔌 SRV Records#

1 records 112ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 192ms

TXT Record
MS=ms64755753
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.ktbyg.dk)
p=reject	v=DMARC1; p=reject; pct=100; rua=mailto:dmarc_agg@vali.email;

📬 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 2026-10-13 21:06:13

www	104.21.79.48 172.67.142.4 2606:4700:3035::ac43:8e04 2606:4700:3037::6815:4f30 (AS13335) (address records, no CNAME)
www vs bare domain	Same network ktbyg.dk: 104.21.79.48 172.67.142.4 2606:4700:3035::ac43:8e04 2606:4700:3037::6815:4f30 (AS13335) www.ktbyg.dk: 104.21.79.48 172.67.142.4 2606:4700:3035::ac43:8e04 2606:4700:3037::6815:4f30 (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

🔎 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#

110ms

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

🏷️ SOA#

34ms

Field	Value
Serial	2417371541
Primary NS (MNAME)	ada.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-07 04:26:47

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2024-02-26
Expires	2030-02-25 (1224d)

📋 WHOIS#

⏱️ Lookup Timing#

40ms

35ms

34ms

AAAA

32ms

TXT

192ms

CAA

42ms

HTTPS

46ms

TLSA

950ms

SOA

34ms

MTA-STS

57ms

DNSSEC

110ms

SRV

112ms

Total

2600ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 21:06:13 shown	2600ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-30 11:07:02	884ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-29 14:05:21	1481ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-21 07:55:43	1900ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-07 07:08:10	2202ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-31 05:16:54	2279ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-27 10:24:19	1379ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-26 10:21:44	1243ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-09 15:21:03	2095ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-02 08:20:38	9617ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-09 19:37:18	11044ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-30 18:23:43	1602ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-25 11:21:27	3708ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-25 10:40:02	2152ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-24 14:22:27	2419ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-20 03:33:22	1320ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-17 15:20:59	1130ms	2 NS 2 A 1 MX	🔒 Secure