effective-learning.dk

📜 Historical scan 2026-08-28 13:13:57  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

effective-learning.dk is a .dk domain served by 2 nameservers (aragorn.ns.cloudflare.com, brianna.ns.cloudflare.com). It was registered on 16 July 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.9.175 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no 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#

2 records   28ms
NameserverIP addressesPTRASN / ISP
aragorn.ns.cloudflare.com 108.162.193.67
172.64.33.67
173.245.59.67
2606:4700:58::adf5:3b43
2803:f800:50::6ca2:c143
2a06:98c1:50::ac40:2143		 aragorn.ns.cloudflare.com
aragorn.ns.cloudflare.com
aragorn.ns.cloudflare.com
aragorn.ns.cloudflare.com
aragorn.ns.cloudflare.com
aragorn.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
brianna.ns.cloudflare.com 108.162.192.245
172.64.32.245
173.245.58.245
2606:4700:50::adf5:3af5
2803:f800:50::6ca2:c0f5
2a06:98c1:50::ac40:20f5		 brianna.ns.cloudflare.com
brianna.ns.cloudflare.com
brianna.ns.cloudflare.com
brianna.ns.cloudflare.com
brianna.ns.cloudflare.com
brianna.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.

🌍 A Records#

2 records   34ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.9.175 300s — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.161.35 300s — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —

📧 MX Records#

📧
No MX records found

🔷 AAAA Records (IPv6)#

2 records   27ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3030::6815:9af 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3037::ac43:a123 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   37ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.9.175,172.67.161.35 ech=AEX+DQBBjQAgACBSh8QW+XqlJXROM9FqAwq4DhVtV7x48NVL/eUjcZ0oNAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:9af,2606:4700:3037::ac43:a123

📝 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 2026-10-15 11:47:31
www104.21.9.175 172.67.161.35 2606:4700:3030::6815:9af 2606:4700:3037::ac43:a123 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceCompact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEYDelete signal: the zone asks the registry to remove its DS (go insecure) 1 CDS, 1 CDNSKEY

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.effective-learning.dk O2mUnA341Kg7XTNBzx0j6thRVp6cov359X0tfBuRdhs
TXT _acme-challenge.effective-learning.dk UpBLtlVV6T3JVJSSlASmhHdnGd5vbhvooOcAEPJgbDw

🔗 TLSA / DANE#

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

🔐 DNSSEC#

98ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✓ Found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2413371039
Primary NS (MNAME)aragorn.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-18 05:24:42
FieldValue
RegistrarAbion AB
Registered2018-07-16
Expires2027-07-31 (285d)

🔗 Same registrant#

25 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
alsidig.dkAbion AB
dchnykobing-rorvig.dkAbion AB
flyfromhamburg.dkAbion AB
gershoejkro.dkAbion AB
indbetalingsbonusser.dkAbion AB
induetime.dkAbion AB
kbh-taido.dkAbion AB
kunstforeningen-pakhuset.dkAbion AB
linedance-kalender.dkAbion AB
maritimt-center.dkAbion AB
mccurdies.dkAbion AB
miljoetransport.dkAbion AB
ms-portalen.dkAbion AB
musikuddannelser.dkAbion AB
odensedataplatform.dkAbion AB
pedelarsen.dkAbion AB
pers-kaktus.dkAbion AB
runners-shop.dkAbion AB
safesurf.dkAbion AB
sis-denmark.dkAbion AB
skibby-kommune.dkAbion AB
skive-egnen.dkAbion AB
thecolomergroup.dkAbion AB
wdch-pony-07.dkAbion AB
zoomtv.dkAbion AB
📋 WHOIS#

⏱️ Lookup Timing#

NS
28ms
A
34ms
MX
33ms
AAAA
27ms
TXT
166ms
CAA
29ms
HTTPS
37ms
TLSA
53ms
SOA
0ms
MTA-STS
54ms
DNSSEC
98ms
SRV
54ms
Total
539ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-15 11:47:30 1240ms 2 NS 2 A 0 MX 🔓 Insecure
2026-10-03 14:51:06 973ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-30 14:46:31 954ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-29 14:38:56 848ms 1 NS 0 A 0 MX ❓ Unknown
2026-09-21 17:24:45 1286ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-15 01:26:25 842ms 2 NS 2 A 0 MX 🔓 Insecure
2026-09-07 12:01:25 1648ms 2 NS 2 A 0 MX 🔓 Insecure
2026-08-28 13:13:57 shown 539ms 2 NS 2 A 0 MX 🔓 Insecure
2026-08-24 20:03:14 2689ms 2 NS 2 A 0 MX 🔓 Insecure
2026-08-08 07:22:15 788ms 2 NS 2 A 0 MX 🔓 Insecure
2026-07-13 05:50:18 900ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-24 21:28:51 859ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-24 11:42:14 761ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-19 23:18:07 699ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-17 06:16:05 10376ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-17 06:06:03 1463ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-17 06:02:57 308ms 2 NS 2 A 0 MX 🔓 Insecure
2026-06-17 06:00:39 389ms 2 NS 2 A 0 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone