bycoltau.dk

📜 Historical scan 2026-06-21 09:20:39 · ← 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 122ms

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 97ms

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 120ms

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 500ms

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#

227ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2407441579
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 (246d)

📋 WHOIS#

⏱️ Lookup Timing#

122ms

97ms

120ms

AAAA

96ms

TXT

500ms

CAA

150ms

HTTPS

91ms

TLSA

142ms

SOA

0ms

MTA-STS

134ms

DNSSEC

227ms

SRV

211ms

Total

1193ms

🕐 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	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 shown	1193ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-16 18:05:41	515ms	2 NS 1 A 3 MX	🔓 Insecure