schoollab.dk

📜 Historical scan 2026-06-22 15:32:46  ·  ← Latest scan
⬇ 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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   165ms
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   184ms
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   183ms
PriorityTTLMail ServerIP addressesPTRASN
10 300s mx.simply.com 94.231.106.20 mx.simply.com 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   259ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3031::6815:b91 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3031::ac43:9579 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   131ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.11.145,172.67.149.121 ech=AEX+DQBBIwAgACDj9aMTM9rYGGutNorsxuIpZxCDAv16YxX4SW1Ew+u2KQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:b91,2606:4700:3031::ac43:9579

🔌 SRV Records#

1 records   440ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 maildiscover.simply.com

📝 TXT Records#

3 records   649ms
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#

latest probe, not this scan · checked 2026-10-19 14:41:37
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   131ms
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 A9D603AF4D7ED6B9246B4B68500CD6F2…

🔐 DNSSEC#

443ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2407620791
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 (192d)

🔗 Same registrant#

3 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
pmz.dkSimply.com A/S
📋 WHOIS#

⏱️ Lookup Timing#

NS
165ms
A
184ms
MX
183ms
AAAA
259ms
TXT
649ms
CAA
183ms
HTTPS
131ms
TLSA
131ms
SOA
0ms
MTA-STS
169ms
DNSSEC
443ms
SRV
440ms
Total
3101ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
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 shown 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
dhd.dk [/] search Domains, Hosts & DNS — .dk zone