4-b.dk

📜 Historical scan 2026-07-21 20:01:36  ·  ← 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   29ms
NameserverIP addressesPTRASN / 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   29ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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   29ms
PriorityTTLMail ServerIP addressesPTRASN
0 3600s 4b-dk0c.mail.protection.outlook.com 2a01:111:f403:ca04::1
2a01:111:f403:ca04::8
2a01:111:f403:ca04::e
2a01:111:f403:ca09::5
52.101.68.15
52.101.68.27
52.101.73.15
52.101.73.4		 mail-db7pr03cu00401.inbound.protection.outlook.com
mail-db5pr02cu00100.inbound.protection.outlook.com
mail-db8pr02cu00106.inbound.protection.outlook.com
mail-am1pr04cu00105.inbound.protection.outlook.com
mail-db6pr03cu00107.inbound.protection.outlook.com
mail-db7pr03cu00503.inbound.protection.outlook.com
mail-am9pr04cu00107.inbound.protection.outlook.com
mail-am0pr83cu00404.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#

ServiceCNAME / IP
🔷 Autodiscoverautodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

1 records   29ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
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   77ms
ServicePriorityWeightPortTarget
_sipfederationtls._tcp 100 1 5061 sipfed.online.lync.com

📝 TXT Records#

1 records   158ms
TXT Record
v=spf1 include:spf.catglobe.com include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF#

PolicyRecord (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
www77.111.240.199 2a02:2350:5:101:38:38b6:fbdb:4488 (AS51468) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceNSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEYNone 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#

50ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2026072101
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s

📋 Registration#

WHOIS fetched 2026-10-10 03:46:54
FieldValue
RegistrarONE.COM A/S
Registered2003-10-13
Expires2030-10-31 (1474d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
29ms
A
29ms
MX
29ms
AAAA
29ms
TXT
158ms
CAA
29ms
HTTPS
30ms
TLSA
399ms
SOA
0ms
MTA-STS
39ms
DNSSEC
50ms
SRV
77ms
Total
1283ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
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 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 shown 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
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