grefta.dk DNS records

🖥️ Nameservers2 records 260ms

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 251ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.130.181.250	600s	mail1.klikpost.dk	AS24940	Hetzner Online GmbH	94.130.0.0/16	🇩🇪 Germany	Nuremberg

📧 MX Records5 records 230ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	mx1.mtaroutes.com	149.13.75.27 2001:978:2:2c::137:100	fe1-r3-in.fra02.l.antispamcloud.com fe2-r3-in.ams14.l.antispamcloud.com	AS16633 N-able Technologies, Inc. AS174 Cogent Communications, LLC
20	600s	mx2.mtaroutes.com	149.13.75.27 2001:978:2:7::162:100	fe1-r3-in.fra02.l.antispamcloud.com fe1-r3-in.fra02.l.antispamcloud.com	AS16633 N-able Technologies, Inc. AS174 Cogent Communications, LLC
30	600s	mx3.mtaroutes.com	154.59.104.23 2001:978:2:2c::137:100	fe2-r3-in.ams14.l.antispamcloud.com fe2-r3-in.ams14.l.antispamcloud.com	AS43054 N-able Acquisition Company B.V. AS174 Cogent Communications, LLC
40	600s	mx4.mtaroutes.com	154.59.193.124 2001:978:2:6::f:124	fe3-r3-in.du01.l.antispamcloud.com fe3-r3-in.du01.l.antispamcloud.com	AS16633 N-able Technologies, Inc. AS174 Cogent Communications, LLC
50	600s	mx5.mtaroutes.com	—	—	—

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	grefta.dk → 94.130.181.250
🔶 Autoconfig	grefta.dk → 94.130.181.250

🔷 AAAA Records (IPv6)1 records 249ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:1c0c:41f4::1	600s	mail1.klikpost.dk	AS24940	Hetzner Online GmbH	2a01:4f8:0:0:0:0:0:0/31	🇩🇪 Germany	Nuremberg

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 680ms

TXT Record
f690bb92025c53db79fbd945360cbc220a23795ad216155cf83436dc075f60e5
v=spf1 ip6:2a01:4f8:1c0c:41f4::1 a mx include:spf-partner.lasertryk.dk include:spf.mtaroutes.com -all

✉️ SPF

Policy	Record (grefta.dk)
-all (hard fail)	v=spf1 ip6:2a01:4f8:1c0c:41f4::1 a mx include:spf-partner.lasertryk.dk include:spf.mtaroutes.com -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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.grefta.dk	grefta.dk
TXT	grefta.dk	f690bb92025c53db79fbd945360cbc220a23795ad216155cf83436dc075f60e5

🔗 TLSA / DANE4 records 553ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.mtaroutes.com	DANE-EE · SPKI · SHA-256	A10EC56F992E0E0C5B5A3860F281ADAF…
SMTP _25._tcp.mx2.mtaroutes.com	DANE-EE · SPKI · SHA-256	A10EC56F992E0E0C5B5A3860F281ADAF…
SMTP _25._tcp.mx3.mtaroutes.com	DANE-EE · SPKI · SHA-256	A10EC56F992E0E0C5B5A3860F281ADAF…
SMTP _25._tcp.mx4.mtaroutes.com	DANE-EE · SPKI · SHA-256	A10EC56F992E0E0C5B5A3860F281ADAF…

🔐 DNSSEC523ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082001
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

260ms

A

251ms

MX

230ms

AAAA

249ms

TXT

680ms

CAA

259ms

HTTPS

306ms

TLSA

553ms

SOA

0ms

MTA-STS

367ms

DNSSEC

523ms

SRV

323ms

Total

11097ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-20 12:25:00	11097ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-20 09:45:18	1296ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-25 04:43:42	951ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-22 04:19:27	906ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-20 06:55:36	1329ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-20 03:59:06	2917ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-19 16:19:54	2865ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-18 17:33:42	1312ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-17 09:27:37	843ms	2 NS 1 A 5 MX	🔒 Secure	View