rs4.dk

📜 Historical scan 2026-09-07 04:20:16  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rs4.dk is a .dk domain served by 2 nameservers (ns1.dns.services, ns2.dns.services). It was registered on 5 December 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.7.163.195 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mail.rs4.dk. The zone is not DNSSEC-signed, 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   39ms
NameserverIP addressesPTRASN / ISP
ns1.dns.services 195.242.131.6
2001:67c:564:ffff::11		 ns1.dns.services
ns1.dns.services		 AS62121 Christian Ebsen ApS
AS62121 Christian Ebsen ApS
ns2.dns.services 2a00:1b18:2:3:3::2
62.69.152.37		 ns2.dns.services
ns2.dns.services		 AS47527 DLX A/S
AS47527 DLX A/S

🌍 A Records#

1 records   34ms
IPTTLPTRASNISP / OrgCIDRCountryCity
81.7.163.195 3600s — AS47292 Sentia Denmark A/S 81.7.160.0/21 🇩🇰 Denmark —

📧 MX Records#

1 records   36ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mail.rs4.dk 81.7.132.82 safeweb.dk AS47292 Sentia Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscoverrs4.dk → 81.7.163.195
🔶 Autoconfigrs4.dk → 81.7.163.195

🔷 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 2026-10-13 07:25:54
www81.7.163.195 (AS47292) (address records, no CNAME)
www vs bare domainSame network
rs4.dk: 81.7.163.195 (AS47292)
www.rs4.dk: 81.7.163.195 (AS47292)
WildcardYes: any name under the zone resolves

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.rs4.dk rs4.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

81ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2022072802
Primary NS (MNAME)ns1.dns.services
Responsible (RNAME)hostmaster@comasys.dk
Refresh10800s
Retry3600s
Expire2419000s
Minimum (neg-cache TTL)43200s

📋 Registration#

WHOIS fetched 2026-10-18 17:04:32
FieldValue
RegistrarNamehost by CoMaSys ApS
Registered2007-12-05
Expires2026-12-31 (73d)

🔗 Same registrant#

32 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
adspau.dkNamehost by CoMaSys ApS
aex.dkNamehost by CoMaSys ApS
au2.dkNamehost by CoMaSys ApS
backupdenmark.dkNamehost by CoMaSys ApS
bimi.dkNamehost by CoMaSys ApS
book-bord.dkNamehost by CoMaSys ApS
bookbord.dkNamehost by CoMaSys ApS
broderjensen.dkNamehost by CoMaSys ApS
camping-wifi.dkNamehost by CoMaSys ApS
cmssite.dkNamehost by CoMaSys ApS
danskcloud.dkNamehost by CoMaSys ApS
devino.dkNamehost by CoMaSys ApS
dinerobackup.dkNamehost by CoMaSys ApS
dkimtest.dkNamehost by CoMaSys ApS
dmarc-monitor.dkNamehost by CoMaSys ApS
erhvervsinternet.dkNamehost by CoMaSys ApS
fiber-internet.dkNamehost by CoMaSys ApS
hooligans-register.dkNamehost by CoMaSys ApS
hooligansregister.dkNamehost by CoMaSys ApS
hotelwifi.dkNamehost by CoMaSys ApS
industrytravellers.dkNamehost by CoMaSys ApS
it-gennemgang.dkNamehost by CoMaSys ApS
kampens-spiller.dkNamehost by CoMaSys ApS
mailforward.dkNamehost by CoMaSys ApS
min-backup.dkNamehost by CoMaSys ApS
safetycam.dkNamehost by CoMaSys ApS
safeweb.dkNamehost by CoMaSys ApS
serversikring.dkNamehost by CoMaSys ApS
studie-pc.dkNamehost by CoMaSys ApS
wifiasaservice.dkNamehost by CoMaSys ApS
wifiservice.dkNamehost by CoMaSys ApS
ønskerne.dkNamehost by CoMaSys ApS
📋 WHOIS#

⏱️ Lookup Timing#

NS
39ms
A
34ms
MX
36ms
AAAA
30ms
TXT
121ms
CAA
34ms
HTTPS
30ms
TLSA
56ms
SOA
0ms
MTA-STS
64ms
DNSSEC
81ms
SRV
52ms
Total
544ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-03 21:42:20 496ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-30 05:53:47 487ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-16 21:29:43 1082ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-07 04:20:16 shown 544ms 2 NS 1 A 1 MX 🔓 Insecure
2026-07-29 09:22:33 4720ms 2 NS 1 A 1 MX 🔓 Insecure
2026-07-02 10:04:15 774ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-18 04:54:18 3746ms 2 NS 1 A 1 MX 🔓 Insecure
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