byco.dk

📜 Historical scan 2026-06-27 11:00:39 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

byco.dk is a .dk domain served by 3 nameservers (ns4.dns-123.net, ns5.dns-123.net, ns6.dns-123.net). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.103.46.102 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by ASPMX.L.GOOGLE.COM, ALT1.ASPMX.L.GOOGLE.COM and 5 more. The zone is DNSSEC-signed and validates, publishes a 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#

3 records 254ms

Nameserver	IP addresses	PTR	ASN / ISP
ns4.dns-123.net	35.198.132.83	83.132.198.35.bc.googleusercontent.com	AS396982 Google LLC
ns5.dns-123.net	35.187.184.173	173.184.187.35.bc.googleusercontent.com	AS396982 Google LLC
ns6.dns-123.net	35.228.54.1	1.54.228.35.bc.googleusercontent.com	AS396982 Google LLC

🌍 A Records#

1 records 232ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.103.46.102	7200s	server6102.serverpark.dk	AS44869	FIBIA P/S	5.103.0.0/16	🇩🇰 Denmark	Holbæk

📧 MX Records#

7 records 243ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	7200s	ASPMX.L.GOOGLE.COM	142.251.127.27 2a00:1450:400c:c0a::1b 2a00:1450:400c:c0a::1b	lcfrai-in-f27.1e100.net wl-in-f27.1e100.net wl-in-x1b.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
20	7200s	ALT1.ASPMX.L.GOOGLE.COM	172.253.152.27 2a00:1450:4010:c22::1b	yulpptr-in-f27.1e100.net yulpptr-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
20	7200s	ALT2.ASPMX.L.GOOGLE.COM	192.178.211.26 2404:6800:4000:1025::1a	lcbomp-in-f26.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	7200s	ASPMX2.GOOGLEMAIL.COM	172.253.152.27 2a00:1450:4010:c22::1a	yulpptr-in-f27.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	7200s	ASPMX3.GOOGLEMAIL.COM	192.178.211.27 2404:6800:4000:1025::1b	lcbomp-in-f27.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	7200s	ASPMX4.GOOGLEMAIL.COM	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	7200s	ASPMX5.GOOGLEMAIL.COM	172.253.152.27 2a00:1450:4010:c22::1a	yulpptr-in-f27.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	5.103.46.102
🔶 Autoconfig	5.103.46.102

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 611ms

TXT Record
v=spf1 a mx include:_spf.serverpark.dk ~all

✉️ SPF#

Policy	Record (byco.dk)
~all (soft fail)	v=spf1 a mx include:_spf.serverpark.dk ~all

📨 DMARC#

Policy	Record (_dmarc.byco.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-09 09:34:39

www	5.103.46.102 (AS44869) (address records, no CNAME)
www vs bare domain	Same network byco.dk: 5.103.46.102 (AS44869) www.byco.dk: 5.103.46.102 (AS44869)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

575ms

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

🏷️ SOA#

237ms

Field	Value
Serial	2012103313
Primary NS (MNAME)	ns4.dns-123.net
Responsible (RNAME)	admin@dns-123.net
Refresh	28800s
Retry	7200s
Expire	604800s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

254ms

232ms

243ms

AAAA

259ms

TXT

611ms

CAA

254ms

HTTPS

264ms

TLSA

310ms

SOA

237ms

MTA-STS

262ms

DNSSEC

575ms

SRV

398ms

Total

1910ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 09:34:39	957ms	3 NS 1 A 7 MX	🔒 Secure
2026-10-02 09:48:35	832ms	3 NS 1 A 7 MX	🔒 Secure
2026-09-30 14:58:28	1041ms	3 NS 1 A 7 MX	🔒 Secure
2026-09-27 17:49:14	997ms	3 NS 1 A 7 MX	🔒 Secure
2026-08-27 22:49:41	1299ms	3 NS 1 A 7 MX	🔒 Secure
2026-08-26 16:54:37	9722ms	3 NS 1 A 7 MX	🔒 Secure
2026-08-25 18:31:03	1410ms	3 NS 1 A 7 MX	🔒 Secure
2026-06-28 16:40:37	1192ms	3 NS 1 A 7 MX	🔒 Secure
2026-06-27 11:00:39 shown	1910ms	3 NS 1 A 7 MX	🔒 Secure
2026-06-26 09:02:26	1008ms	3 NS 1 A 7 MX	🔒 Secure
2026-06-16 18:05:04	991ms	3 NS 1 A 7 MX	🔒 Secure