helsinge-realskole.dk

📜 Historical scan 2026-06-17 11:14:32 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

helsinge-realskole.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 18 June 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.98 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by helsingerealskole-dk02b.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a 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 48ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 101ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.98	—	linux26.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 30ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	helsingerealskole-dk02b.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca04::6 2a01:111:f403:ca04::a 2a01:111:f403:ca09::7 52.101.68.16 52.101.68.36 52.101.73.30 52.101.73.4	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com mail-am0pr83cu00404.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 158ms

TXT Record
v=spf1 ip4:87.116.2.122 ip4:185.163.189.22 ip4:89.221.167.1/24 include:spf.protection.outlook.com include:web.shared.mysmtp.com -all

✉️ SPF#

Policy	Record (helsinge-realskole.dk)
-all (hard fail)	v=spf1 ip4:87.116.2.122 ip4:185.163.189.22 ip4:89.221.167.1/24 include:spf.protection.outlook.com include:web.shared.mysmtp.com -all

📨 DMARC#

Policy	Record (_dmarc.helsinge-realskole.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:it@helsinge-realskole.dk; ruf=mailto:it@helsinge-realskole.dk; fo=1

📬 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 2026-10-16 18:37:47

www	185.21.41.98 (AS48854) (address records, no CNAME)
www vs bare domain	Same network helsinge-realskole.dk: 185.21.41.98 (AS48854) www.helsinge-realskole.dk: 185.21.41.98 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-helsingerealskole-dk02b._domainkey.helsingerealskole.onmicrosoft.com	RSA · ~1024 bit below 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: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

60ms

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

🏷️ SOA#

99ms

Field	Value
Serial	2026021801
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-05 21:37:51

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2002-06-18
Expires	2027-06-30 (246d)

📋 WHOIS#

⏱️ Lookup Timing#

48ms

101ms

30ms

AAAA

30ms

TXT

158ms

CAA

30ms

HTTPS

43ms

TLSA

986ms

SOA

99ms

MTA-STS

105ms

DNSSEC

60ms

SRV

0ms

Total

1547ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-08-26 18:19:27	694ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-02 18:23:45	800ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 07:38:42	714ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 11:14:32 shown	1547ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 11:11:53	1040ms	2 NS 1 A 1 MX	🔒 Secure