optu.dk

Records from scan: 2026-10-18 03:51:35  ·  562ms total  ·  last checked 2026-10-19 04:44 (unchanged)
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

optu.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 8 September 2026 (WHOIS) and first appeared in the .dk zone on 9 September 2026. Its website address 46.30.215.228 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by mx1.mailpod16-cph3.g1i.one.com, mx2.mailpod16-cph3.g1i.one.com and 2 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   35ms
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   30ms
IPTTLPTRASNISP / OrgCIDRCountryCity
46.30.215.228 3600s webcluster2.webpod18-cph3.g1i.one AS51468 One.com A/S 46.30.208.0/21 🇩🇰 Denmark Copenhagen

📧 MX Records#

4 records   43ms
PriorityTTLMail ServerIP addressesPTRASN
10 10800s mx1.mailpod16-cph3.g1i.one.com 5.249.232.33 mx1.mailpod16-cph3.g1i.one.com AS51468 One.com A/S
10 10800s mx2.mailpod16-cph3.g1i.one.com 5.249.232.34 mx2.mailpod16-cph3.g1i.one.com AS51468 One.com A/S
10 10800s mx3.mailpod16-cph3.g1i.one.com 5.249.232.35 mx3.mailpod16-cph3.g1i.one.com AS51468 One.com A/S
10 10800s mx4.mailpod16-cph3.g1i.one.com 5.249.232.36 mx4.mailpod16-cph3.g1i.one.com AS51468 One.com A/S

🔷 AAAA Records (IPv6)#

1 records   25ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a02:2350:5:108:8021:1f8d:b293:5e0 3600s — AS51468 One.com A/S 2a02:2350:0:0:0:0:0:0/32 🇩🇰 Denmark Copenhagen

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   148ms
TXT Record
v=spf1 include:_custspf.one.com ~all

✉️ SPF#

PolicyRecord (optu.dk)
~all (soft fail) v=spf1 include:_custspf.one.com ~all

📨 DMARC#

PolicyRecord (_dmarc.optu.dk)
p=reject v=DMARC1; p=reject

📬 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#

checked 2026-10-18 03:51:35
www46.30.215.228 2a02:2350:5:108:8021:1f8d:b293:5e0 (AS51468) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceNSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

4 records   83ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx1.mailpod16-cph3.g1i.one.com DANE-EE · SPKI · SHA-256 2362DFAC1BB9F66402E0636BDEF478E5…
SMTP _25._tcp.mx2.mailpod16-cph3.g1i.one.com DANE-EE · SPKI · SHA-256 2362DFAC1BB9F66402E0636BDEF478E5…
SMTP _25._tcp.mx3.mailpod16-cph3.g1i.one.com DANE-EE · SPKI · SHA-256 2362DFAC1BB9F66402E0636BDEF478E5…
SMTP _25._tcp.mx4.mailpod16-cph3.g1i.one.com DANE-EE · SPKI · SHA-256 2362DFAC1BB9F66402E0636BDEF478E5…

🔐 DNSSEC#

56ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

41ms
FieldValue
Serial2026101721
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s

📋 Registration#

WHOIS fetched 2026-10-17 02:58:39
FieldValue
RegistrarONE.COM A/S
Registered2026-09-08
Expires2027-09-07 (322d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

DomainRegistrar
ffstudio.dkONE.COM A/S
nightnight.dkONE.COM A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
35ms
A
30ms
MX
43ms
AAAA
25ms
TXT
148ms
CAA
44ms
HTTPS
39ms
TLSA
83ms
SOA
41ms
MTA-STS
44ms
DNSSEC
56ms
SRV
50ms
Total
562ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-18 03:51:35 shown 562ms 2 NS 1 A 4 MX 🔒 Secure
2026-10-17 02:39:44 479ms 2 NS 1 A 1 MX 🔒 Secure
2026-10-06 03:58:11 622ms 2 NS 1 A 1 MX 🔓 Insecure
2026-10-05 03:54:38 128ms 1 NS 0 A 0 MX ❓ Unknown
2026-10-04 03:49:43 215ms 1 NS 0 A 0 MX ❓ Unknown
2026-10-03 03:48:07 156ms 1 NS 0 A 0 MX ❓ Unknown
2026-10-02 03:47:37 773ms 1 NS 0 A 0 MX ❓ Unknown
2026-10-01 03:30:23 237ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-30 03:25:42 763ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-29 15:13:09 336ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-28 14:59:45 229ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-27 14:53:31 214ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-26 14:32:29 220ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-25 14:26:42 247ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-24 14:12:15 2683ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-24 11:27:45 237ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-23 11:13:20 215ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-16 09:31:11 238ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-09 09:08:23 1122ms 1 NS 0 A 0 MX ❓ Unknown
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