3840.dk

Records from scan: 2026-10-04 07:51:19 · 2663ms total · last checked 2026-10-17 00:23 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3840.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 14 April 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.213.77 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by 3840-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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 120ms

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 112ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.213.77	3600s	webcluster1.webpod13-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 66ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	3840-dk.mail.protection.outlook.com	2a01:111:f403:c967::8 2a01:111:f403:c967::a 2a01:111:f403:c967::c 2a01:111:f403:ca3c::a 52.101.103.162 52.101.73.126 52.101.73.155 52.101.91.156	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-cpjpr05cu00102.inbound.protection.outlook.com mail-cpjpr05cu00204.inbound.protection.outlook.com mail-zrxpr07cu00102.inbound.protection.outlook.com mail-miypr03cu00202.inbound.protection.outlook.com mail-am8pr83cu00106.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 52.98.154.136

🔷 AAAA Records (IPv6)#

1 records 138ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:10b:6a:a02d:f271:fe0e	3600s	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 384ms

TXT Record
google-site-verification=qQpH_pspXSmTEKk2zOSyNfSzfmxLEt-27PxaQnSz4Uw
MS=ms28705897
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (3840.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 2026-10-11 10:49:11

www	46.30.213.77 2a02:2350:5:10b:6a:a02d:f271:fe0e (AS51468) (address records, no CNAME)
www vs bare domain	Same network 3840.dk: 46.30.213.77 2a02:2350:5:10b:6a:a02d:f271:fe0e (AS51468) www.3840.dk: 46.30.213.77 2a02:2350:5:10b:6a:a02d:f271:fe0e (AS51468)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-3840-dk._domainkey.systemit3840.w-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-3840-dk._domainkey.systemit3840.w-v1.dkim.mail.microsoft	RSA · ~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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

254ms

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

🏷️ SOA#

111ms

Field	Value
Serial	2026100301
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 2026-10-04 08:21:05

Field	Value
Registrar	ONE.COM A/S
Registered	2022-04-14
Expires	2027-04-13 (178d)

📋 WHOIS#

⏱️ Lookup Timing#

120ms

112ms

66ms

AAAA

138ms

TXT

384ms

CAA

96ms

HTTPS

128ms

TLSA

958ms

SOA

111ms

MTA-STS

152ms

DNSSEC

254ms

SRV

160ms

Total

2663ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 07:51:19 shown	2663ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-01 07:41:07	1224ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-29 20:53:52	630ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 04:20:21	1061ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-24 00:43:18	1014ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-21 13:17:44	941ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-24 08:13:13	5303ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-21 02:32:37	1995ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-11 05:57:02	5933ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-21 18:04:32	1143ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 00:07:29	1373ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:53:29	2318ms	2 NS 1 A 1 MX	🔒 Secure