seffiber.dk

📜 Historical scan 2026-06-19 17:52:48 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

seffiber.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 23 April 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.148 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by web6.netplads.dk. The zone is DNSSEC-signed and validates, 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 46ms

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 78ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.148	3600s	linux101.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 76ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	web6.netplads.dk	91.221.196.224	—	AS51468 One.com A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝

No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-09 04:51:59

www	185.21.41.148 (AS48854) (address records, no CNAME)
www vs bare domain	Same network seffiber.dk: 185.21.41.148 (AS48854) www.seffiber.dk: 185.21.41.148 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔗 TLSA / DANE#

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

🔐 DNSSEC#

121ms

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

🏷️ SOA#

74ms

Field	Value
Serial	2026053101
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 2026-10-03 04:27:12

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2020-04-23
Expires	2027-04-30 (194d)

📋 WHOIS#

⏱️ Lookup Timing#

46ms

78ms

76ms

AAAA

82ms

TXT

210ms

CAA

71ms

HTTPS

36ms

TLSA

303ms

SOA

74ms

MTA-STS

53ms

DNSSEC

121ms

SRV

147ms

Total

780ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-03 04:03:59	978ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-01 03:54:31	576ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-23 10:18:21	871ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-04 23:31:28	1140ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-02 02:01:10	8642ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-01 02:28:16	535ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 17:52:48 shown	780ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 13:52:49	1657ms	2 NS 1 A 1 MX	🔒 Secure