fdf.dk DNS records

🖥️ Nameservers2 records 68ms

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 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.45	600s	linux28.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records5 records 60ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	173.194.222.27 2a00:1450:4010:c1c::1b	lo-in-f27.1e100.net la-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1a	lcdels-in-f26.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1a	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1b	tp-in-f27.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.56

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 79ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 208ms

TXT Record
facebook-domain-verification=o0q5mhs5kd7xctwm6jpjbpooq5soj3
v=spf1 include:spf.protection.outlook.com include:_spf.google.com ip4:46.31.17.0/24 ip4:83.151.133.21/32 ip4:217.74.213.4/32 ip4:217.74.213.0/24 include:servers.mcsv.net include:spf.smtp2go.com include:steingabelgaard.dk include:spectra-systems.eu -all

✉️ SPF

Policy	Record (fdf.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:_spf.google.com ip4:46.31.17.0/24 ip4:83.151.133.21/32 ip4:217.74.213.4/32 ip4:217.74.213.0/24 include:servers.mcsv.net include:spf.smtp2go.com include:steingabelgaard.dk include:spectra-systems.eu -all

📨 DMARC

Policy	Record (_dmarc.fdf.dk)
p=quarantine	v=DMARC1; p=quarantine; sp=reject; pct=100; fo=1;

📬 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.fdf.dk	Ip4JEvcc86optduzzFcsWC8RWTZrN9eVVcouUHTadgM

🔗 TLSA / DANE

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

🔐 DNSSEC110ms

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

🏷️ SOA0ms

Field	Value
Serial	2026032401
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

68ms

A

41ms

MX

60ms

AAAA

68ms

TXT

208ms

CAA

73ms

HTTPS

56ms

TLSA

76ms

SOA

0ms

MTA-STS

97ms

DNSSEC

110ms

SRV

79ms

Total

716ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 00:14:16	716ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-26 07:38:52	683ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-16 00:59:27	5173ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-14 00:04:29	6991ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-17 10:15:59	742ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-17 10:14:49	4734ms	2 NS 1 A 5 MX	🔒 Secure	View