filtertek.dk DNS records

🖥️ Nameservers2 records 208ms

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 Records1 records 225ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.178	3599s	linux19.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records4 records 247ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mx01.hornetsecurity.com	94.100.132.8	mx01.hornetsecurity.com	AS25394 MK Netzdienste GmbH & Co. KG
20	43200s	mx02.hornetsecurity.com	94.100.136.8	mx02.hornetsecurity.com	AS24679 kyberio GmbH
30	43200s	mx03.hornetsecurity.com	94.100.134.8	mx03.hornetsecurity.com	AS12676 HKN GmbH
40	43200s	mx04.hornetsecurity.com	94.100.136.7	mx04.hornetsecurity.com	AS24679 kyberio GmbH

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscoverredirect.sfp-net.com → 212.53.208.152
🔶 Autoconfig	185.21.41.178

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records3 records 593ms

TXT Record
v=spf1 a mx include:spf.sfp-net.com ~all
v=spf1 include:spf.curanet.dk
v=spf1 include:spf.magepartner.net mx ip4:83.246.65.0/24 ip4:217.64.175.0/24 ip4:94.100.128.0/20 ~all

✉️ SPF

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

Policy	Record (filtertek.dk)
~all (soft fail)	v=spf1 a mx include:spf.sfp-net.com ~all
no all — incomplete SPF	v=spf1 include:spf.curanet.dk
~all (soft fail)	v=spf1 include:spf.magepartner.net mx ip4:83.246.65.0/24 ip4:217.64.175.0/24 ip4:94.100.128.0/20 ~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

🔗 TLSA / DANE

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

🔐 DNSSEC414ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081802
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 — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

208ms

A

225ms

MX

247ms

AAAA

234ms

TXT

593ms

CAA

305ms

HTTPS

288ms

TLSA

392ms

SOA

0ms

MTA-STS

281ms

DNSSEC

414ms

SRV

341ms

Total

3286ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-25 13:02:08	4807ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-08-19 18:21:32	1930ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-08-18 18:18:23	3286ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-23 16:44:07	702ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-20 06:17:49	797ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-17 09:48:46	792ms	2 NS 1 A 4 MX	🔒 Secure	View