256.dk

📜 Historical scan 2026-09-17 00:00:30 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

256.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx01.mail.icloud.com, mx02.mail.icloud.com. The zone is DNSSEC-signed and validates, has no 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#

2 records 127ms

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#

🌍

No A records found

📧 MX Records#

2 records 136ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mx01.mail.icloud.com	17.42.251.62 17.42.251.62 17.42.251.62 17.56.9.31 17.56.9.31 17.57.152.5 17.57.152.5 17.57.152.5 17.57.152.5 17.57.154.33 17.57.154.33 17.57.155.25 17.57.155.25 17.57.156.30 17.57.156.30	mx01.mail.icloud.com mx02.mail.icloud.com mx3.mail.icloud.com mx02.mail.icloud.com mx01.mail.icloud.com smtp1.ic4-privaterelay.appleid.com mx02.mail.icloud.com mx01.mail.icloud.com ic4-privaterelay.appleid.com mx02.mail.icloud.com mx01.mail.icloud.com mx01.mail.icloud.com mx02.mail.icloud.com mx01.mail.icloud.com mx02.mail.icloud.com	AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc.
10	43200s	mx02.mail.icloud.com	17.42.251.62 17.42.251.62 17.42.251.62 17.56.9.31 17.56.9.31 17.57.152.5 17.57.152.5 17.57.152.5 17.57.152.5 17.57.154.33 17.57.154.33 17.57.155.25 17.57.155.25 17.57.156.30 17.57.156.30	mx3.mail.icloud.com mx02.mail.icloud.com mx01.mail.icloud.com mx02.mail.icloud.com mx01.mail.icloud.com ic4-privaterelay.appleid.com mx01.mail.icloud.com mx02.mail.icloud.com smtp1.ic4-privaterelay.appleid.com mx02.mail.icloud.com mx01.mail.icloud.com mx01.mail.icloud.com mx02.mail.icloud.com mx01.mail.icloud.com mx02.mail.icloud.com	AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc. AS714 Apple Inc.

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 243ms

TXT Record
apple-domain=zfhsDNFtbeChU5Pr
v=spf1 include:icloud.com ~all
v=spf1 redirect=spf.runbox.com

✉️ SPF#

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (256.dk)
~all (soft fail)	v=spf1 include:icloud.com ~all
redirect=spf.runbox.com	v=spf1 redirect=spf.runbox.com

📨 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 2026-10-13 06:49:30

www	46.30.211.38 (AS51468) (address records, no CNAME)
www vs bare domain	Only www resolves 256.dk: no address www.256.dk: 46.30.211.38 (AS51468) (all like this)
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: 5/10 · policy: ~all

error 2 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

161ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

0ms

Field	Value
Serial	2026091101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

127ms

116ms

136ms

AAAA

109ms

TXT

243ms

CAA

108ms

HTTPS

94ms

TLSA

54ms

SOA

0ms

MTA-STS

137ms

DNSSEC

161ms

SRV

154ms

Total

993ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 06:49:30	728ms	2 NS 0 A 2 MX	🔒 Secure
2026-10-08 18:33:20	534ms	2 NS 0 A 2 MX	🔒 Secure
2026-10-01 07:06:32	444ms	2 NS 0 A 2 MX	🔒 Secure
2026-09-30 07:46:26	486ms	2 NS 0 A 2 MX	🔒 Secure
2026-09-23 15:47:57	2552ms	2 NS 0 A 2 MX	🔒 Secure
2026-09-17 00:00:30 shown	993ms	2 NS 0 A 2 MX	🔒 Secure
2026-08-27 23:16:08	659ms	2 NS 0 A 2 MX	🔒 Secure
2026-08-18 13:21:21	5261ms	2 NS 0 A 2 MX	🔒 Secure
2026-08-14 16:27:00	1285ms	2 NS 0 A 2 MX	🔒 Secure
2026-07-19 17:17:53	5097ms	2 NS 0 A 2 MX	🔒 Secure
2026-07-13 13:38:31	3019ms	2 NS 0 A 2 MX	🔒 Secure
2026-07-02 00:34:07	710ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 13:13:07	961ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 13:12:44	14579ms	2 NS 0 A 2 MX	🔒 Secure