1class.dk

📜 Historical scan 2026-10-13 18:59:01  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

1class.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 8 April 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 191.235.208.12 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by .. 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   34ms
NameserverIP addressesPTRASN / 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   34ms
IPTTLPTRASNISP / OrgCIDRCountryCity
191.235.208.12 43200s — AS8075 Microsoft Corporation 191.232.0.0/13 🇮🇪 Ireland Dublin

📧 MX Records#

1 records   40ms
PriorityTTLMail ServerIP addressesPTRASN
0 300s .  Null MX — domain accepts no email (RFC 7505)

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscovereditor4u.azurewebsites.net → 40.112.90.244
🔶 Autoconfigeditor4u.azurewebsites.net → 40.112.90.244

🔷 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 2026-10-14 19:23:08
www CNAMEeditor4u.azurewebsites.net (all on azurewebsites.net)
www vs bare domainSame network
1class.dk: 191.235.208.12 (AS8075)
www.1class.dk: 40.112.90.244 (AS8075)
WildcardYes: any name under the zone resolves
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.1class.dk editor4u.azurewebsites.net

🔗 TLSA / DANE#

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

🔐 DNSSEC#

114ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

28ms
FieldValue
Serial2026101301
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s

📋 Registration#

WHOIS fetched 2026-10-09 02:45:23
FieldValue
RegistrarPunktum dk A/S (direct)
Registered1999-04-08
Expires2027-06-30 (256d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
34ms
A
34ms
MX
40ms
AAAA
31ms
TXT
188ms
CAA
31ms
HTTPS
35ms
TLSA
981ms
SOA
28ms
MTA-STS
119ms
DNSSEC
114ms
SRV
111ms
Total
1841ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-14 19:23:08 1252ms 2 NS 1 A 1 MX 🔒 Secure
2026-10-13 18:59:01 shown 1841ms 2 NS 1 A 1 MX 🔒 Secure
2026-10-01 04:04:44 802ms 2 NS 1 A 4 MX 🔒 Secure
2026-09-16 22:43:54 1251ms 2 NS 1 A 4 MX 🔒 Secure
2026-09-04 04:40:08 726ms 2 NS 1 A 4 MX 🔒 Secure
2026-08-26 12:00:05 1752ms 2 NS 1 A 4 MX 🔒 Secure
2026-07-01 13:42:14 932ms 2 NS 1 A 4 MX 🔒 Secure
2026-06-16 12:42:14 917ms 2 NS 1 A 4 MX 🔒 Secure
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