jacobsen-byg.dk

📜 Historical scan 2026-09-30 10:36:43 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jacobsen-byg.dk is a .dk domain served by 2 nameservers (asa.ns.cloudflare.com, cleo.ns.cloudflare.com). It was registered on 14 February 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.74.102 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 46ms

Nameserver	IP addresses	PTR	ASN / ISP
asa.ns.cloudflare.com	108.162.192.246 172.64.32.246 173.245.58.246 2606:4700:50::adf5:3af6 2803:f800:50::6ca2:c0f6 2a06:98c1:50::ac40:20f6	asa.ns.cloudflare.com asa.ns.cloudflare.com asa.ns.cloudflare.com asa.ns.cloudflare.com asa.ns.cloudflare.com asa.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
cleo.ns.cloudflare.com	108.162.193.89 172.64.33.89 173.245.59.89 2606:4700:58::adf5:3b59 2803:f800:50::6ca2:c159 2a06:98c1:50::ac40:2159	cleo.ns.cloudflare.com cleo.ns.cloudflare.com cleo.ns.cloudflare.com cleo.ns.cloudflare.com cleo.ns.cloudflare.com cleo.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 19ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.74.102	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.157.48	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 42ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:4a66	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:9d30	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 47ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.74.102,172.67.157.48 ech=AEX+DQBBtQAgACAAdwTQLbqYK0sdUVDib5ozbHMmbrXTrcXDS27YbwHRBgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:4a66,2606:4700:3037::ac43:9d30

📝 TXT Records#

2 records 177ms

TXT Record
google-site-verification=I1UXV7NGo-cGMOYEwDa9XCW1oWGKIAmNGhKSqOi7M-U
v=spf1 ip4:185.26.104.0/22 ~all

✉️ SPF#

Policy	Record (jacobsen-byg.dk)
~all (soft fail)	v=spf1 ip4:185.26.104.0/22 ~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 2026-10-11 22:27:50

www	104.21.74.102 172.67.157.48 2606:4700:3034::6815:4a66 2606:4700:3037::ac43:9d30 (AS13335) (address records, no CNAME)
www vs bare domain	Same network jacobsen-byg.dk: 104.21.74.102 172.67.157.48 2606:4700:3034::6815:4a66 2606:4700:3037::ac43:9d30 (AS13335) www.jacobsen-byg.dk: 104.21.74.102 172.67.157.48 2606:4700:3034::6815:4a66 2606:4700:3037::ac43:9d30 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

68ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

47ms

Field	Value
Serial	2412068164
Primary NS (MNAME)	asa.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-05 11:38:47

Field	Value
Registrar	NETIM
Registered	2026-02-14
Expires	2027-02-13 (113d)

📋 WHOIS#

⏱️ Lookup Timing#

46ms

19ms

31ms

AAAA

42ms

TXT

177ms

CAA

50ms

HTTPS

47ms

TLSA

62ms

SOA

47ms

MTA-STS

49ms

DNSSEC

68ms

SRV

63ms

Total

425ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 22:27:50	624ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-05 11:02:16	1242ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-30 10:36:43 shown	425ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-26 19:04:49	585ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-13 10:03:25	8762ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-07 21:55:58	9726ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-22 05:02:20	564ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-18 02:18:30	1360ms	2 NS 2 A 0 MX	🔓 Insecure