bluestudy.dk

📜 Historical scan 2026-06-16 15:03:08  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

bluestudy.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 18 April 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.simply.com. 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#

4 records   391ms
NameserverIP addressesPTRASN / ISP
ns1.simply.com — — —
ns2.simply.com — — —
ns3.simply.com — — —
ns4.simply.com — — —

🌍 A Records#

1 records   375ms
IPTTLPTRASNISP / OrgCIDRCountryCity
94.231.103.180 — linux159.unoeuro.com AS48854 — — — —

📧 MX Records#

1 records   364ms
PriorityTTLMail ServerIP addressesPTRASN
10 — mx.simply.com 94.231.106.20 mx.simply.com AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   721ms
TXT Record
v=spf1 a mx include:_spf.mlsend.com ?all

✉️ SPF#

PolicyRecord (bluestudy.dk)
?all (neutral) v=spf1 a mx include:_spf.mlsend.com ?all

📨 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 2026-10-11 21:29:16
www94.231.103.180 (AS48854) (address records, no CNAME)
www vs bare domainSame network
bluestudy.dk: 94.231.103.180 (AS48854)
www.bluestudy.dk: 94.231.103.180 (AS48854)
WildcardYes: any name under the zone resolves
Denial of existenceNSEC zone can be walked (all names enumerable)
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ?all

  • warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

2 records   310ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 A9D603AF4D7ED6B9246B4B68500CD6F2…
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 97A3BA009F39C761BFFB6574340E8138…

🔐 DNSSEC#

566ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

323ms
FieldValue
Serial2025042300
Primary NS (MNAME)ns1.simply.com
Responsible (RNAME)hostmaster@simply.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-07 11:49:40
FieldValue
RegistrarSimply.com A/S
Registered2018-04-18
Expires2027-04-30 (195d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
391ms
A
375ms
MX
364ms
AAAA
344ms
TXT
721ms
CAA
297ms
HTTPS
349ms
TLSA
310ms
SOA
323ms
MTA-STS
376ms
DNSSEC
566ms
SRV
0ms
Total
2630ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-01 16:35:08 771ms 4 NS 1 A 1 MX 🔒 Secure
2026-09-26 15:41:55 520ms 4 NS 1 A 1 MX 🔒 Secure
2026-06-20 12:22:18 518ms 4 NS 1 A 1 MX 🔒 Secure
2026-06-16 15:05:48 1477ms 4 NS 1 A 1 MX 🔒 Secure
2026-06-16 15:03:08 shown 2630ms 4 NS 1 A 1 MX 🔒 Secure
2026-06-16 15:01:30 487ms 4 NS 1 A 1 MX 🔒 Secure
2026-06-16 15:00:05 674ms 4 NS 1 A 1 MX 🔒 Secure
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