fels.dk DNS records

🖥️ Nameservers2 records 45ms

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 47ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
152.115.49.15	600s	—	AS31027	GlobalConnect A/S	152.115.0.0/16	🇩🇰 Denmark	Copenhagen

📧 MX Records2 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	43200s	mailfilter0.rackhosting.com	77.247.73.194 77.247.73.195 77.247.73.196 77.247.73.197	mailfilter-se0.rackhosting.com mailfilter-se1.rackhosting.com mailfilter-se2.rackhosting.com mailfilter-se3.rackhosting.com	AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS
20	43200s	mailfilter1.rackhosting.com	77.247.73.198 77.247.73.199 77.247.73.200 77.247.73.201	mailfilter-se0-1.rackhosting.com mailfilter-se1-1.rackhosting.com mailfilter-se2-1.rackhosting.com mailfilter-se3-1.rackhosting.com	AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS AS31590 Rackhosting.com ApS

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 189ms

TXT Record
v=spf1 include:spf.rackhosting.com -all

✉️ SPF

Policy	Record (fels.dk)
-all (hard fail)	v=spf1 include:spf.rackhosting.com -all

📨 DMARC

Policy	Record (_dmarc.fels.dk)
p=reject	v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc@fak.dk;

📬 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)

🔐 DNSSEC90ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081201
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

45ms

A

47ms

MX

45ms

AAAA

54ms

TXT

189ms

CAA

39ms

HTTPS

63ms

TLSA

92ms

SOA

0ms

MTA-STS

67ms

DNSSEC

90ms

SRV

71ms

Total

707ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 09:28:37	707ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-21 13:48:30	4991ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-12 19:41:15	5367ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-18 18:49:25	1425ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-17 07:31:32	1087ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-13 22:27:03	1289ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-07 04:49:20	4590ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-20 02:13:21	2621ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 09:30:11	1134ms	2 NS 1 A 2 MX	🔒 Secure	View