byens-byg.dk

📜 Historical scan 2026-06-16 18:05:37 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

byens-byg.dk is a .dk domain served by 2 nameservers (meiling.ns.cloudflare.com, sullivan.ns.cloudflare.com). It was registered on 14 January 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.96.61 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by byensbyg-dk01c.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a 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 44ms

Nameserver	IP addresses	PTR	ASN / ISP
meiling.ns.cloudflare.com	—	—	—
sullivan.ns.cloudflare.com	—	—	—

🌍 A Records#

2 records 65ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.96.61	—	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.173.155	—	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	byensbyg-dk01c.mail.protection.outlook.com	52.101.68.32 52.101.68.39 52.101.68.5 52.101.73.26	mail-db3pr0202cu00200.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)#

2 records 80ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:ad9b	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:603d	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 49ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.96.61,172.67.173.155 ech=AEX+DQBB6gAgACBAk7biNGguDhfElDNDlBhA4bndbZdx+H8iOS6FUr6nJQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:ad9b,2606:4700:3035::6815:603d

📝 TXT Records#

2 records 153ms

TXT Record
MS=ms46981915
v=spf1 include:sendgrid.net include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF#

Policy	Record (byens-byg.dk)
-all (hard fail)	v=spf1 include:sendgrid.net include:spf.protection.outlook.com include:_custspf.one.com -all

📨 DMARC#

Policy	Record (_dmarc.byens-byg.dk)
p=reject	v=DMARC1; p=reject;rua=mailto:tjmpklk7@ag.eu.dmarcian.com; ruf=mailto:tjmpklk7@fr.eu.dmarcian.com

📬 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 16:49:02

www	104.21.96.61 172.67.173.155 2606:4700:3033::ac43:ad9b 2606:4700:3037::6815:603d (AS13335) (address records, no CNAME)
www vs bare domain	Same network byens-byg.dk: 104.21.96.61 172.67.173.155 2606:4700:3033::ac43:ad9b 2606:4700:3037::6815:603d (AS13335) www.byens-byg.dk: 104.21.96.61 172.67.173.155 2606:4700:3033::ac43:ad9b 2606:4700:3037::6815:603d (AS13335)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

4 found

Selector	CNAME	Key
s1	s1.domainkey.u24356317.wl068.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u24356317.wl068.sendgrid.net	RSA · ~2048 bit
selector1	selector1-byensbyg-dk01c._domainkey.byensbyg.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-byensbyg-dk01c._domainkey.byensbyg.onmicrosoft.com	RSA · ~1024 bit below 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: 4/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

155ms

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

🏷️ SOA#

52ms

Field	Value
Serial	2406677662
Primary NS (MNAME)	meiling.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-21 11:03:58

Field	Value
Registrar	ONE.COM A/S
Registered	2020-01-14
Expires	2027-01-31 (95d)

🔗 Same registrant#

2 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
byens-byggerådgivning.dk	Domeneshop AS
byensbyggeraadgivning.dk	ONE.COM A/S

📋 WHOIS#

⏱️ Lookup Timing#

44ms

65ms

52ms

AAAA

80ms

TXT

153ms

CAA

48ms

HTTPS

49ms

TLSA

858ms

SOA

52ms

MTA-STS

32ms

DNSSEC

155ms

SRV

0ms

Total

1418ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-06 11:37:17	2384ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-01 08:33:21	584ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-14 15:27:46	2342ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-09 10:27:25	2159ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-16 22:05:23	9082ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-26 18:51:44	1498ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-24 20:52:58	1127ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 18:05:37 shown	1418ms	2 NS 2 A 1 MX	🔓 Insecure