schoollab.dk

Records from scan: 2026-10-21 23:42:21  ·  2374ms total  ·  last checked 2026-10-23 01:53 (unchanged)
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

schoollab.dk is a .dk domain served by 2 nameservers (arya.ns.cloudflare.com, logan.ns.cloudflare.com). It was registered on 23 April 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.11.145 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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#

2 records   69ms
NameserverIP addressesPTRASN / ISP
arya.ns.cloudflare.com 108.162.192.70
172.64.32.70
173.245.58.70
2606:4700:50::adf5:3a46
2803:f800:50::6ca2:c046
2a06:98c1:50::ac40:2046		 arya.ns.cloudflare.com
arya.ns.cloudflare.com
arya.ns.cloudflare.com
arya.ns.cloudflare.com
arya.ns.cloudflare.com
arya.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
logan.ns.cloudflare.com 108.162.193.198
172.64.33.198
173.245.59.198
2606:4700:58::adf5:3bc6
2803:f800:50::6ca2:c1c6
2a06:98c1:50::ac40:21c6		 logan.ns.cloudflare.com
logan.ns.cloudflare.com
logan.ns.cloudflare.com
logan.ns.cloudflare.com
logan.ns.cloudflare.com
logan.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   97ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.11.145 300s — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.149.121 300s — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —

📧 MX Records#

1 records   110ms
PriorityTTLMail ServerIP addressesPTRASN
10 300s mx.simply.com 94.231.103.108
94.231.106.20		 mx.simply.com
mx.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover104.21.11.145
🔶 Autoconfigmaildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

2 records   96ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3030::ac43:9579 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3037::6815:b91 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   137ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.11.145,172.67.149.121 ech=AEX+DQBB1wAgACCVK7dxef0HPWWW7h08zU/OBeDGZzvqyphWOCCCJWrccAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:9579,2606:4700:3037::6815:b91

🔌 SRV Records#

1 records   199ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 maildiscover.simply.com

📝 TXT Records#

3 records   365ms
TXT Record
detectify-verification=0d4619ea4d27973440b2f39b24df3c10
google-site-verification=SkQaEVVq0g0dKAPGS5_rAL4PgFSMUXc8KXpEmQ_HR4g
v=spf1 include:_spf.mailersend.net include:spf.simply.com -all

✉️ SPF#

PolicyRecord (schoollab.dk)
-all (hard fail) v=spf1 include:_spf.mailersend.net include:spf.simply.com -all

📨 DMARC#

PolicyRecord (_dmarc.schoollab.dk)
p=none (monitor only) v=DMARC1; p=none

📬 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 2026-10-21 23:42:21
www104.21.11.145 172.67.149.121 2606:4700:3030::ac43:9579 2606:4700:3037::6815:b91 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

2 records   955ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 4B949F05A63FED95FC94B3A83DD70167…

🔐 DNSSEC#

294ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

72ms
FieldValue
Serial2417822250
Primary NS (MNAME)arya.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-19 14:53:29
FieldValue
RegistrarSimply.com A/S
Registered2021-04-23
Expires2027-04-30 (189d)

🔗 Same registrant#

5 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
ajejlogin.dkPunktum dk A/S (direct)
lobsterlab.dkSimply.com A/S
platformizer.dkSimply.com A/S
pmz.dkSimply.com A/S
pmzlogin.dkSimply.com A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
69ms
A
97ms
MX
110ms
AAAA
96ms
TXT
365ms
CAA
79ms
HTTPS
137ms
TLSA
955ms
SOA
72ms
MTA-STS
197ms
DNSSEC
294ms
SRV
199ms
Total
2374ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-21 23:42:21 shown 2374ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-20 19:10:14 2532ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-19 14:41:37 495ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-05 03:18:26 507ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-24 01:11:11 636ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-23 00:17:13 1899ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-13 22:10:58 1794ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-21 03:09:00 1193ms 2 NS 2 A 1 MX 🔓 Insecure
2026-08-04 21:12:23 986ms 2 NS 2 A 1 MX 🔓 Insecure
2026-07-17 11:30:10 935ms 2 NS 2 A 1 MX 🔓 Insecure
2026-07-03 01:22:20 1192ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-22 15:32:46 3101ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-18 16:59:17 906ms 2 NS 2 A 1 MX 🔓 Insecure
2026-06-18 01:50:16 708ms 2 NS 2 A 1 MX 🔓 Insecure
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