bycoltau.dk

📜 Historical scan 2026-10-08 07:37:19 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

bycoltau.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, justin.ns.cloudflare.com). It was registered on 30 June 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 23.88.110.211 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.bycoltau.dk, mx1.onlinemail.io and 1 more. The zone is not DNSSEC-signed, 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 28ms

Nameserver	IP addresses	PTR	ASN / ISP
barbara.ns.cloudflare.com	108.162.192.248 172.64.32.248 173.245.58.248 2606:4700:50::adf5:3af8 2803:f800:50::6ca2:c0f8 2a06:98c1:50::ac40:20f8	barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
justin.ns.cloudflare.com	108.162.193.187 172.64.33.187 173.245.59.187 2606:4700:58::adf5:3bbb 2803:f800:50::6ca2:c1bb 2a06:98c1:50::ac40:21bb	justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

1 records 32ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
23.88.110.211	300s	static.211.110.88.23.clients.your-server.de	AS24940	Hetzner Online GmbH	23.88.0.0/17	🇩🇪 Germany	Nuremberg

📧 MX Records#

3 records 31ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	mail.bycoltau.dk	23.88.110.211	static.211.110.88.23.clients.your-server.de	AS24940 Hetzner Online GmbH
10	300s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	300s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 161ms

TXT Record
v=spf1 a include:spf.curanet.dk ~all
v=spf1 a mx ~all

✉️ SPF#

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (bycoltau.dk)
~all (soft fail)	v=spf1 a include:spf.curanet.dk ~all
~all (soft fail)	v=spf1 a mx ~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 2026-10-16 19:43:24

www CNAME	bycoltau.dk (all on bycoltau.dk) → 23.88.110.211 (AS24940)
www vs bare domain	Same network bycoltau.dk: 23.88.110.211 (AS24940) www.bycoltau.dk: 23.88.110.211 (AS24940)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

error 2 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

61ms

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

🏷️ SOA#

27ms

Field	Value
Serial	2416804018
Primary NS (MNAME)	barbara.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-06 20:33:35

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2020-06-30
Expires	2027-06-30 (247d)

📋 WHOIS#

⏱️ Lookup Timing#

28ms

32ms

31ms

AAAA

30ms

TXT

161ms

CAA

39ms

HTTPS

31ms

TLSA

83ms

SOA

27ms

MTA-STS

55ms

DNSSEC

61ms

SRV

51ms

Total

469ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 19:43:24	1914ms	2 NS 1 A 3 MX	🔓 Insecure
2026-10-08 07:37:19 shown	469ms	2 NS 1 A 3 MX	🔓 Insecure
2026-10-07 20:24:52	3064ms	2 NS 1 A 3 MX	🔓 Insecure
2026-10-06 20:20:15	601ms	2 NS 1 A 3 MX	🔓 Insecure
2026-09-26 18:55:20	9528ms	2 NS 1 A 3 MX	🔓 Insecure
2026-08-19 07:14:21	5002ms	2 NS 1 A 3 MX	🔓 Insecure
2026-08-06 16:58:50	2159ms	2 NS 1 A 3 MX	🔓 Insecure
2026-07-01 18:50:42	862ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-25 10:34:43	3592ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-22 05:22:15	613ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-21 09:20:39	1193ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-16 18:05:41	515ms	2 NS 1 A 3 MX	🔓 Insecure