energi-isolering.dk

Records from scan: 2026-09-27 03:53:26 · 3186ms total · last checked 2026-10-16 23:16 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

energi-isolering.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 14 September 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.251 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by energiisolering-dk01e.mail.protection.outlook.com, mx1.onlinemail.io and 1 more. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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 33ms

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 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.251	360s	linux8.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

3 records 48ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	energiisolering-dk01e.mail.protection.outlook.com	2a01:111:f403:ca09::24 2a01:111:f403:ca21::a 2a01:111:f403:ca21::e 2a01:111:f403:ca48::8 52.101.103.137 52.101.91.156 52.101.91.159 52.101.91.21	mail-am6pr02cu00204.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-matpr04cu00306.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-maspr04cu00104.inbound.protection.outlook.com mail-matpr04cu00207.inbound.protection.outlook.com mail-matpr05cu00105.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
10	3600s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	3600s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.149.152
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

4 records 124ms

TXT Record
google-site-verification=kXRSnOrWTYwJqEJpG131AK8hgXalyTAM2P6rbp1Eq8w
MS=ms95488127
v=spf1 a include:spf.protection.outlook.com include:spf.curanet.dk ~all
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (energi-isolering.dk)
~all (soft fail)	v=spf1 a include:spf.protection.outlook.com include:spf.curanet.dk ~all
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 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#

checked 2026-10-14 21:46:09

www	185.21.40.251 (AS48854) (address records, no CNAME)
www vs bare domain	Same network energi-isolering.dk: 185.21.40.251 (AS48854) www.energi-isolering.dk: 185.21.40.251 (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

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: ~all

error 2 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

2052ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026051801
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 2026-10-16 18:50:24

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2008-09-14
Expires	2030-09-30 (1444d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

33ms

34ms

48ms

AAAA

31ms

TXT

124ms

CAA

38ms

HTTPS

35ms

TLSA

738ms

SOA

0ms

MTA-STS

49ms

DNSSEC

2052ms

SRV

53ms

Total

3186ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-27 03:53:26 shown	3186ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-14 00:12:01	1231ms	2 NS 1 A 3 MX	🔒 Secure
2026-07-02 04:13:51	1761ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-17 07:25:45	714ms	2 NS 1 A 3 MX	🔒 Secure