heiberg-sp.dk

Records from scan: 2026-09-25 17:40:58 · 1105ms total · last checked 2026-10-19 14:47 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

heiberg-sp.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 4 April 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.51.2.4 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by heibergsp-dk01i.mail.protection.outlook.com. 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 39ms

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
87.51.2.4	900s	—	AS3292	TDC Holding A/S	87.48.0.0/13	🇩🇰 Denmark	Aarhus

📧 MX Records#

1 records 28ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	heibergsp-dk01i.mail.protection.outlook.com	2a01:111:f403:c967::8 2a01:111:f403:ca04::f 2a01:111:f403:ca21::c 2a01:111:f403:ca38::a 52.101.185.24 52.101.68.12 52.101.91.153 52.101.91.156	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-wa4pr05cu00102.inbound.protection.outlook.com mail-zrxpr07cu00100.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-matpr04cu00101.inbound.protection.outlook.com mail-maspr04cu00104.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 → 40.104.116.56
🔶 Autoconfig	87.51.2.4

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 76ms

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

📝 TXT Records#

2 records 136ms

TXT Record
MS=ms83544817
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (heiberg-sp.dk)
-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 2026-10-13 08:08:17

www	87.51.2.4 (AS3292) (address records, no CNAME)
www vs bare domain	Same network heiberg-sp.dk: 87.51.2.4 (AS3292) www.heiberg-sp.dk: 87.51.2.4 (AS3292)
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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

72ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2021111801
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 2026-10-09 13:05:09

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2001-04-04
Expires	2027-06-30 (253d)

📋 WHOIS#

⏱️ Lookup Timing#

39ms

34ms

28ms

AAAA

30ms

TXT

136ms

CAA

31ms

HTTPS

20ms

TLSA

647ms

SOA

0ms

MTA-STS

48ms

DNSSEC

72ms

SRV

76ms

Total

1105ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-25 17:40:58 shown	1105ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 19:08:29	986ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 01:46:01	1218ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 19:41:23	1148ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 19:29:46	1108ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 10:58:09	1423ms	2 NS 1 A 1 MX	🔒 Secure