optom.dk

📜 Historical scan 2026-06-17 14:40:49  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

optom.dk is a .dk domain served by 4 nameservers (ns1.dotserv.com, ns1.dotserv.net, ns2.dotserv.com and 1 more). It was registered on 8 April 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.216.97 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by mail.optom.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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#

4 records   49ms
NameserverIP addressesPTRASN / ISP
ns1.dotserv.com 178.20.218.61
2a01:7cc0:101:ffff::51		 ns1.dotserv.com
ns1.dotserv.com		 AS21060 Atea A/S
AS21060 Atea A/S
ns1.dotserv.net 178.20.217.29
2a01:7cc0:101:ffff::52		 ns1.dotserv.net
ns2.dotserv.com		 AS21060 Atea A/S
AS21060 Atea A/S
ns2.dotserv.com 193.180.214.21 — AS44803 Webdock.io ApS
ns2.dotserv.net 162.19.249.51
2001:41d0:701:1100::c89e		 ns2.dotserv.net
ns2.dotserv.net		 AS16276 OVH SAS
AS16276 OVH SAS

🌍 A Records#

1 records   48ms
IPTTLPTRASNISP / OrgCIDRCountryCity
178.20.216.97 — s0.enavn.dk AS21060 Atea A/S 178.20.216.0/23 🇩🇰 Denmark —

📧 MX Records#

1 records   42ms
PriorityTTLMail ServerIP addressesPTRASN
10 — mail.optom.dk 178.20.216.97
2a01:7cc0:101:ffff::1:12		 s0.enavn.dk
—		 AS21060 Atea A/S
AS21060 Atea A/S

🔷 AAAA Records (IPv6)#

1 records   41ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2a01:7cc0:101:ffff::1:12 — — AS21060 Atea A/S 2a01:7cc0:100:0:0:0:0:0/40 🇩🇰 Denmark —

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   149ms
TXT Record
v=spf1 include:_spf.protection.outlook.com -all

✉️ SPF#

PolicyRecord (optom.dk)
-all (hard fail) v=spf1 include:_spf.protection.outlook.com -all

📨 DMARC#

PolicyRecord (_dmarc.optom.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#

latest probe, not this scan · checked 2026-10-26 07:03:26
www178.20.216.97 2a01:7cc0:101:ffff::1:12 (AS21060) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceNSEC zone can be walked (all names enumerable)
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found
SelectorCNAMEKey
default — RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

  • error include:_spf.protection.outlook.com has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

152ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✓ Found
Flagsunsigned answer

🏷️ SOA#

46ms
FieldValue
Serial2020032503
Primary NS (MNAME)ns1.dotserv.com
Responsible (RNAME)hostmaster@dotserv.com
Refresh3600s
Retry7200s
Expire1209600s
Minimum (neg-cache TTL)900s

📋 Registration#

WHOIS fetched 2026-10-10 16:27:06
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2008-04-08
Expires2027-04-30 (184d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
49ms
A
48ms
MX
42ms
AAAA
41ms
TXT
149ms
CAA
45ms
HTTPS
36ms
TLSA
215ms
SOA
46ms
MTA-STS
121ms
DNSSEC
152ms
SRV
0ms
Total
1411ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-26 07:03:26 1041ms 4 NS 1 A 1 MX 🔓 Insecure
2026-09-30 04:26:12 575ms 4 NS 1 A 1 MX 🔓 Insecure
2026-08-26 16:56:19 793ms 4 NS 1 A 1 MX 🔓 Insecure
2026-06-27 16:37:57 895ms 4 NS 1 A 1 MX 🔓 Insecure
2026-06-17 14:40:49 shown 1411ms 4 NS 1 A 1 MX 🔓 Insecure
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