4box.dk

Records from scan: 2026-09-29 18:40:22 · 414ms total · last checked 2026-10-16 13:12 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

4box.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 51.89.99.87 is hosted by OVH SAS (AS16276) in United Kingdom. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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 34ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
51.89.99.87	3600s	ns3163776.ip-51-89-99.eu	AS16276	OVH SAS	51.89.0.0/16	🇬🇧 United Kingdom	London

📧 MX Records#

2 records 42ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	3600s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 137ms

TXT Record
v=spf1 include:spf.onlinemail.io -all

✉️ SPF#

Policy	Record (4box.dk)
-all (hard fail)	v=spf1 include:spf.onlinemail.io -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 07:21:41

www	51.89.99.87 (AS16276) (address records, no CNAME)
www vs bare domain	Same network 4box.dk: 51.89.99.87 (AS16276) www.4box.dk: 51.89.99.87 (AS16276)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

77ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2025011801
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

34ms

35ms

42ms

AAAA

40ms

TXT

137ms

CAA

32ms

HTTPS

34ms

TLSA

64ms

SOA

0ms

MTA-STS

46ms

DNSSEC

77ms

SRV

47ms

Total

414ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 18:40:22 shown	414ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-16 18:08:27	6892ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-25 03:19:11	755ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-23 18:33:45	1148ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 12:51:44	1316ms	2 NS 1 A 2 MX	🔒 Secure