erhvervsdykkerskolen.dk

Records from scan: 2026-09-29 13:44:09 · 949ms total · last checked 2026-10-20 12:34 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

erhvervsdykkerskolen.dk is a .dk domain served by 2 nameservers (jacqueline.ns.cloudflare.com, phil.ns.cloudflare.com). It was registered on 26 February 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.62.252 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by erhvervsdykkerskolen-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 48ms

Nameserver	IP addresses	PTR	ASN / ISP
jacqueline.ns.cloudflare.com	108.162.194.132 162.159.38.132 172.64.34.132 2606:4700:50::a29f:2684 2803:f800:50::6ca2:c284 2a06:98c1:50::ac40:2284	jacqueline.ns.cloudflare.com jacqueline.ns.cloudflare.com jacqueline.ns.cloudflare.com jacqueline.ns.cloudflare.com jacqueline.ns.cloudflare.com jacqueline.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
phil.ns.cloudflare.com	108.162.193.137 172.64.33.137 173.245.59.137 2606:4700:58::adf5:3b89 2803:f800:50::6ca2:c189 2a06:98c1:50::ac40:2189	phil.ns.cloudflare.com phil.ns.cloudflare.com phil.ns.cloudflare.com phil.ns.cloudflare.com phil.ns.cloudflare.com phil.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 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.62.252	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.141.61	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	erhvervsdykkerskolen-dk.mail.protection.outlook.com	2a01:111:f403:ca04::a 2a01:111:f403:ca09::20 2a01:111:f403:ca21::e 2a01:111:f403:ca3c::a 52.101.103.39 52.101.185.24 52.101.68.15 52.101.68.25	mail-du0pr03cu00102.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-matpr04cu00306.inbound.protection.outlook.com mail-zrxpr07cu00102.inbound.protection.outlook.com mail-miypr05cu00207.inbound.protection.outlook.com mail-zrxpr07cu00100.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24
🔶 Autoconfig	104.21.62.252

🔷 AAAA Records (IPv6)#

2 records 46ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:8d3d	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:3efc	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 33ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.62.252,172.67.141.61 ech=AEX+DQBB4wAgACBxLzCVt58u0238+KpWIyBCwB3Sd6EJvNsgsS4+2o/FSQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:8d3d,2606:4700:3036::6815:3efc

🔌 SRV Records#

1 records 85ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

1 records 206ms

TXT Record
v=spf1 +a +mx +ip4:209.124.66.7 ip4:23.83.208.0/20 include:spf.a2hosting.com include:spf.protection.outlook.com include:send.heyloyalty.com include:relay.mailchannels.net ~all

✉️ SPF#

Policy	Record (erhvervsdykkerskolen.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:209.124.66.7 ip4:23.83.208.0/20 include:spf.a2hosting.com include:spf.protection.outlook.com include:send.heyloyalty.com include:relay.mailchannels.net ~all

📨 DMARC#

Policy	Record (_dmarc.erhvervsdykkerskolen.dk)
p=none (monitor only)	v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;rua=mailto:kontakt@erhvervsdykkerskolen.dk;ruf=mailto:kontakt@erhvervsdykkerskolen.dk

📬 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 2026-10-02 14:02:22

www	Address record (no CNAME)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.erhvervsdykkerskolen.dk	3PuDVS2oX5YX4mJX0QezvTLeBsNl4VM5eVJY0Nj_Rb8

🔗 TLSA / DANE#

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

🔐 DNSSEC#

123ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2416085167
Primary NS (MNAME)	jacqueline.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-14 14:47:26

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2024-02-26
Expires	2027-02-25 (127d)

🔗 Same registrant#

22 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).

Domain	Registrar
danskdykning.dk	Punktum dk A/S (direct)
divers-event.dk	Punktum dk A/S (direct)
divetheworld.dk	Punktum dk A/S (direct)
dyk-auktion.dk	Punktum dk A/S (direct)
dyk-fyn.dk	Punktum dk A/S (direct)
dykfyn.dk	Punktum dk A/S (direct)
dykkergear.dk	Punktum dk A/S (direct)
fritidsdykkerskolen.dk	Punktum dk A/S (direct)
godiving.dk	Punktum dk A/S (direct)
justdive.dk	Punktum dk A/S (direct)
oceanadventures.dk	Punktum dk A/S (direct)
odense-vaerket.dk	Punktum dk A/S (direct)
odensefridykkerklub.dk	Punktum dk A/S (direct)
odenseværket.dk	Punktum dk A/S (direct)
oxydive.dk	Punktum dk A/S (direct)
oxywell.dk	Punktum dk A/S (direct)
place2scuba.dk	Punktum dk A/S (direct)
place4diver.dk	Punktum dk A/S (direct)
sport-fritid2000.dk	Punktum dk A/S (direct)
subgear.dk	Punktum dk A/S (direct)
uvjagt-fyn.dk	Punktum dk A/S (direct)
worlddiving.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

48ms

38ms

44ms

AAAA

46ms

TXT

206ms

CAA

40ms

HTTPS

33ms

TLSA

181ms

SOA

0ms

MTA-STS

79ms

DNSSEC

123ms

SRV

85ms

Total

949ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 13:44:09 shown	949ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-28 13:32:15	1158ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-27 13:21:43	1077ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-26 13:13:30	1877ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-06 18:37:52	1395ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-11 18:30:28	2480ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-04 14:29:43	2649ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-19 07:45:16	2372ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-26 17:27:21	1625ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-19 20:13:45	1300ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-17 08:05:20	1120ms	2 NS 2 A 1 MX	🔒 Secure