4a.dk

📜 Historical scan 2026-08-27 14:31:56 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4a.dk is a .dk domain served by 4 nameservers (ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com and 1 more). It was registered on 25 June 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 80.92.65.188 is hosted by Datacenter Luxembourg S.A. (AS24611) in Luxembourg. Mail is handled by 4a-dk.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#

4 records 71ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.eurodns.com	199.167.66.107 2610:1c8:b002::107	ns1.eurodns.com ns1.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns2.eurodns.com	104.37.178.107 2610:1c8:b001::107	ns2.eurodns.com ns2.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns3.eurodns.com	199.167.66.108 2610:1c8:b002::108	ns3.eurodns.com ns3.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC
ns4.eurodns.com	104.37.178.108 2610:1c8:b001::108	ns4.eurodns.com ns4.eurodns.com	AS23393 NuCDN LLC AS23393 NuCDN LLC

🌍 A Records#

1 records 62ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
80.92.65.188	600s	80-92-65-188.ip.dclux.com	AS24611	Datacenter Luxembourg S.A.	80.92.64.0/19	🇱🇺 Luxembourg	Luxembourg

📧 MX Records#

1 records 90ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	4a-dk.mail.protection.outlook.com	2a01:111:f403:ca04::a 2a01:111:f403:ca04::c 2a01:111:f403:ca09::20 2a01:111:f403:ca09::c 52.101.73.12 52.101.73.123 52.101.73.126 52.101.73.6	mail-du0pr03cu00102.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-am8pr83cu00106.inbound.protection.outlook.com mail-am6pr04cu00306.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 → 40.104.116.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 291ms

TXT Record
7h+Vm9FBiRKIqMvoDza6xwhXpWebVz7g1Gi1MniOr+pENve8MFgB557H/FO+2Jq/B/SYzQR75N+MkV+79q7NwQ==
MS=ms83721365
v=spf1 -all

✉️ SPF#

Policy	Record (4a.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC#

Policy	Record (_dmarc.4a.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:mvb73pgw@ag.eu.dmarcian.com;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

Status	Report address (rua)
✓ Enabled	mailto:mvb73pgw@tls.eu.dmarcian.com

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-15 00:03:28

www	80.92.65.188 (AS24611) (address records, no CNAME)
www vs bare domain	Same network 4a.dk: 80.92.65.188 (AS24611) www.4a.dk: 80.92.65.188 (AS24611)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-4a-dk._domainkey.starkworkspace.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-4a-dk._domainkey.starkworkspace.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: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

73ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2025072373
Primary NS (MNAME)	ns1.eurodns.com
Responsible (RNAME)	hostmaster@eurodns.com
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-05 03:44:15

Field	Value
Registrar	Eurodns S.A
Registered	1997-06-25
Expires	2027-06-30 (256d)

📋 WHOIS#

⏱️ Lookup Timing#

71ms

62ms

90ms

AAAA

73ms

TXT

291ms

CAA

66ms

HTTPS

41ms

TLSA

363ms

SOA

0ms

MTA-STS

75ms

DNSSEC

73ms

SRV

129ms

Total

1154ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 03:41:07	2930ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-03 03:12:49	3345ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-30 02:59:50	1256ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-29 15:36:03	1682ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-27 06:02:50	898ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-24 00:14:22	1853ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-17 00:01:55	1534ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-28 15:22:57	1258ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-27 14:31:56 shown	1154ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-26 14:24:03	1385ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-10 16:13:29	25116ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-09 15:32:54	9195ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-25 12:28:45	1116ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-23 11:15:45	1237ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-22 06:05:33	1120ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-20 21:52:43	10420ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-04 13:44:26	1827ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-03 12:22:42	10024ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-23 21:00:37	5433ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-23 11:40:29	844ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-22 07:04:39	925ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 13:14:20	1077ms	4 NS 1 A 1 MX	🔒 Secure