byholger.dk

Records from scan: 2026-10-03 01:37:57  ·  1149ms total  ·  last checked 2026-10-16 06:02 (unchanged)
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

byholger.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.171 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.simply.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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#

3 records   77ms
NameserverIP addressesPTRASN / ISP
ns1.simply.com 2a02:2339:1:15c::4562:4562
91.197.248.78		 ns1.simply.com
ns1.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns2.simply.com 185.25.141.15
2a02:2339:4006:101::4562:4562		 ns2.simply.com
ns2.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns3.simply.com 91.197.248.79 ns3.simply.com AS48854 team.blue Denmark A/S

🌍 A Records#

1 records   118ms
IPTTLPTRASNISP / OrgCIDRCountryCity
94.231.103.171 3600s linux152.unoeuro.com AS48854 team.blue Denmark A/S 94.231.96.0/20 🇩🇰 Denmark —

📧 MX Records#

1 records   128ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mx.simply.com 94.231.106.20 mx.simply.com AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover94.231.103.171
🔶 Autoconfigmaildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records   186ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 maildiscover.simply.com

📝 TXT Records#

1 records   271ms
TXT Record
v=spf1 include:spf.simply.com -all

✉️ SPF#

PolicyRecord (byholger.dk)
-all (hard fail) v=spf1 include:spf.simply.com -all

📨 DMARC#

PolicyRecord (_dmarc.byholger.dk)
p=reject v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;

📬 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 2026-10-12 22:55:24
www94.231.103.171 (AS48854) (address records, no CNAME)
www vs bare domainSame network
byholger.dk: 94.231.103.171 (AS48854)
www.byholger.dk: 94.231.103.171 (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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

3 records   214ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 4B949F05A63FED95FC94B3A83DD70167…
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 A9D603AF4D7ED6B9246B4B68500CD6F2…

🔐 DNSSEC#

238ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

78ms
FieldValue
Serial2026100200
Primary NS (MNAME)ns1.simply.com
Responsible (RNAME)hostmaster@simply.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup
📋 WHOIS#

⏱️ Lookup Timing#

NS
77ms
A
118ms
MX
128ms
AAAA
118ms
TXT
271ms
CAA
113ms
HTTPS
101ms
TLSA
214ms
SOA
78ms
MTA-STS
181ms
DNSSEC
238ms
SRV
186ms
Total
1149ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-03 01:37:57 shown 1149ms 3 NS 1 A 1 MX 🔒 Secure
2026-10-01 01:15:08 500ms 3 NS 1 A 1 MX 🔒 Secure
2026-09-27 11:39:05 567ms 3 NS 1 A 1 MX 🔒 Secure
2026-08-27 22:06:18 662ms 3 NS 1 A 1 MX 🔒 Secure
2026-08-26 17:55:10 630ms 3 NS 1 A 1 MX 🔒 Secure
2026-07-27 03:29:06 1026ms 3 NS 1 A 1 MX 🔒 Secure
2026-07-26 02:41:05 9658ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-25 02:16:39 10035ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-23 23:58:51 1246ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-22 23:34:14 1634ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-21 20:32:28 10202ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-20 14:35:47 3299ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-19 06:42:38 9198ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-18 03:14:34 9165ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-17 00:56:25 1228ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-15 05:21:34 1258ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-12 08:40:36 3224ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-08 19:37:39 1400ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-06 08:06:43 3204ms 3 NS 0 A 0 MX ⚠️ Bogus
2026-07-04 23:09:27 854ms 3 NS 1 A 1 MX 🔒 Secure
2026-06-24 06:34:35 734ms 3 NS 1 A 1 MX ⚠️ Bogus
2026-06-24 02:07:09 630ms 3 NS 1 A 1 MX ⚠️ Bogus
2026-06-20 17:31:21 929ms 3 NS 1 A 1 MX 🔒 Secure
2026-06-16 18:22:03 530ms 3 NS 1 A 1 MX 🔒 Secure
2026-06-16 18:20:18 567ms 3 NS 1 A 1 MX 🔒 Secure
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