4-b.dk

📜 Historical scan 2026-08-09 15:08:25 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4-b.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 13 October 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.199 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by 4b-dk0c.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 266ms

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 207ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
77.111.240.199	3600s	webcluster1.wordpresspod1-cph3.one.com	AS51468	One.com A/S	77.111.240.0/22	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 239ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	4b-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::a 2a01:111:f403:ca09::7 2a01:111:f403:ca09::e 52.101.68.16 52.101.73.1 52.101.73.153 52.101.73.30	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-am3pr04cu00501.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

1 records 235ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:101:38:38b6:fbdb:4488	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

🔌 SRV Records#

1 records 301ms

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

📝 TXT Records#

1 records 475ms

TXT Record
v=spf1 include:spf.catglobe.com include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF#

Policy	Record (4-b.dk)
-all (hard fail)	v=spf1 include:spf.catglobe.com include:spf.protection.outlook.com include:_custspf.one.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 2026-10-10 03:20:35

www	77.111.240.199 2a02:2350:5:101:38:38b6:fbdb:4488 (AS51468) (address records, no CNAME)
www vs bare domain	Same network 4-b.dk: 77.111.240.199 2a02:2350:5:101:38:38b6:fbdb:4488 (AS51468) www.4-b.dk: 77.111.240.199 2a02:2350:5:101:38:38b6:fbdb:4488 (AS51468)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

378ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026080901
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 2026-10-10 03:46:54

Field	Value
Registrar	ONE.COM A/S
Registered	2003-10-13
Expires	2030-10-31 (1474d)

📋 WHOIS#

⏱️ Lookup Timing#

266ms

207ms

239ms

AAAA

235ms

TXT

475ms

CAA

236ms

HTTPS

233ms

TLSA

524ms

SOA

0ms

MTA-STS

285ms

DNSSEC

378ms

SRV

301ms

Total

4512ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 03:20:35	1778ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-23 20:01:53	1091ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-14 00:29:41	2465ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-31 16:42:02	2447ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-30 14:50:46	748ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-09 15:08:25 shown	4512ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-06 16:51:51	1802ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-04 12:34:06	1828ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-28 02:05:33	1794ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-27 01:38:06	9116ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-26 01:19:47	3003ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-25 01:03:14	9643ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-23 22:33:16	3210ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-22 22:01:26	9567ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-21 20:01:36	1283ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-20 09:48:16	9237ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-19 02:07:57	1703ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-17 23:12:48	3436ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-16 16:56:10	1162ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-14 14:10:32	1072ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-09 05:40:56	4610ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-06 10:15:46	4978ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-04 20:49:35	2617ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-03 19:55:52	4908ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-01 20:51:04	1012ms	2 NS 1 A 1 MX	🔒 Secure