28721038.dk

📜 Historical scan 2026-06-20 02:49:41 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

28721038.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 March 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.116.232.227 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by 28721038-dk.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 37ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 37ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
217.116.232.227	43200s	227.giga-ptr.232.116.217.in-addr.arpa	AS47292	Sentia Denmark A/S	217.116.224.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	28721038-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::c 2a01:111:f403:ca09::2 2a01:111:f403:ca09::4 52.101.68.15 52.101.73.11 52.101.73.153 52.101.73.30	mail-db4pr02cu00307.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-as8pr05cu00401.inbound.protection.outlook.com mail-am7pr05cu00306.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 → 52.97.174.8
🔶 Autoconfig	217.116.232.227

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 699ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 546ms

TXT Record
MS=ms92105549
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (28721038.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#

latest probe, not this scan · checked 2026-10-22 10:21:46

www	104.21.31.235 172.67.180.192 2606:4700:3031::6815:1feb 2606:4700:3036::ac43:b4c0 (AS13335) (address records, no CNAME)
www vs bare domain	Same network 28721038.dk: 104.21.31.235 172.67.180.192 2606:4700:3031::6815:1feb 2606:4700:3036::ac43:b4c0 (AS13335) www.28721038.dk: 104.21.31.235 172.67.180.192 2606:4700:3031::6815:1feb 2606:4700:3036::ac43:b4c0 (AS13335)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.28721038.dk	qGGCunl1wvW3AMDdCUIgoEImxKj_jUc2JPacEYoqQQg

🔗 TLSA / DANE#

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

🔐 DNSSEC#

405ms

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

🏷️ SOA#

49ms

Field	Value
Serial	2026030301
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-20 15:46:10

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2011-03-26
Expires	2027-05-31 (221d)

🔗 Same registrant#

2 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
nyborgbrand.dk	Punktum dk A/S (direct)
rw-foto.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

37ms

40ms

AAAA

39ms

TXT

546ms

CAA

34ms

HTTPS

35ms

TLSA

138ms

SOA

49ms

MTA-STS

37ms

DNSSEC

405ms

SRV

699ms

Total

1110ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 22:36:28	904ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-11 01:52:22	1940ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-12 18:37:37	1302ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 02:49:41 shown	1110ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:38:53	715ms	2 NS 1 A 1 MX	🔒 Secure