sero.dk

📜 Historical scan 2026-09-23 22:27:04 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sero.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 23 July 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 85.218.177.103 is hosted by Sinal A/S (AS39642) in Denmark. 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#

2 records 67ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 47ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
85.218.177.103	3600s	sorresiig.dk	AS39642	Sinal A/S	85.218.128.0/17	🇩🇰 Denmark	Silkeborg

📧 MX Records#

📧

No MX records found

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	sero.dk → 85.218.177.103
🔶 Autoconfig	sero.dk → 85.218.177.103

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 195ms

TXT Record
v=DMARC1; p=quarantine; pct=100;
v=spf1 mx -all

✉️ SPF#

Policy	Record (sero.dk)
-all (hard fail)	v=spf1 mx -all

📨 DMARC#

Policy	Record (_dmarc.sero.dk)
p=quarantine	v=DMARC1; p=quarantine; pct=100;

📬 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 2026-10-08 05:46:58

www CNAME	sero.dk (all on sero.dk) → 85.218.177.103 (AS39642)
www vs bare domain	Same network sero.dk: 85.218.177.103 (AS39642) www.sero.dk: 85.218.177.103 (AS39642)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.sero.dk	sero.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

141ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026092101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-06 01:00:23

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2002-07-23
Expires	2027-09-30 (340d)

📋 WHOIS#

⏱️ Lookup Timing#

67ms

47ms

73ms

AAAA

69ms

TXT

195ms

CAA

72ms

HTTPS

68ms

TLSA

154ms

SOA

0ms

MTA-STS

97ms

DNSSEC

141ms

SRV

86ms

Total

1295ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-06 00:37:55	393ms	2 NS 1 A 0 MX	🔒 Secure
2026-09-23 22:27:04 shown	1295ms	2 NS 1 A 0 MX	🔒 Secure
2026-09-07 07:35:38	560ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-08 20:09:32	4841ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-05 19:46:05	681ms	2 NS 1 A 0 MX	🔒 Secure
2026-07-04 23:01:02	4624ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-18 09:13:09	2701ms	2 NS 1 A 0 MX	🔒 Secure