28721038.dk

📜 Historical scan 2026-09-11 01:52:22 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

28721038.dk is a .dk domain served by 2 nameservers (etta.ns.cloudflare.com, lee.ns.cloudflare.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 104.21.31.235 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by 28721038-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 106ms

Nameserver	IP addresses	PTR	ASN / ISP
etta.ns.cloudflare.com	108.162.192.156 172.64.32.156 173.245.58.156 2606:4700:50::adf5:3a9c 2803:f800:50::6ca2:c09c 2a06:98c1:50::ac40:209c	etta.ns.cloudflare.com etta.ns.cloudflare.com etta.ns.cloudflare.com etta.ns.cloudflare.com etta.ns.cloudflare.com etta.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
lee.ns.cloudflare.com	108.162.193.129 172.64.33.129 173.245.59.129 2606:4700:58::adf5:3b81 2803:f800:50::6ca2:c181 2a06:98c1:50::ac40:2181	lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.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 141ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.31.235	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.180.192	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 110ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	28721038-dk.mail.protection.outlook.com	2a01:111:f403:ca04::c 2a01:111:f403:ca04::d 2a01:111:f403:ca09::28 2a01:111:f403:ca38::8 52.101.103.39 52.101.68.10 52.101.68.27 52.101.68.8	mail-db9pr02cu00204.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-wa4pr04cu00100.inbound.protection.outlook.com mail-miypr05cu00207.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-du0pr03cu00100.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	104.21.31.235
🔶 Autoconfig	172.67.180.192

🔷 AAAA Records (IPv6)#

2 records 131ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:1feb	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::ac43:b4c0	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 97ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.31.235,172.67.180.192 ech=AEX+DQBBGwAgACAMWwufpVMwBvNnybbLXwcl83lDeOkFYI9kR3gB/+chOwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:1feb,2606:4700:3036::ac43:b4c0

📝 TXT Records#

2 records 282ms

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#

341ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2414451443
Primary NS (MNAME)	etta.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 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 (219d)

🔗 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#

106ms

141ms

110ms

AAAA

131ms

TXT

282ms

CAA

98ms

HTTPS

97ms

TLSA

366ms

SOA

0ms

MTA-STS

121ms

DNSSEC

341ms

SRV

144ms

Total

1940ms

🕐 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 shown	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	1110ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:38:53	715ms	2 NS 1 A 1 MX	🔒 Secure