perfk.dk DNS records

🖥️ Nameservers2 records 48ms

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 39ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
199.36.158.100	3600s	—	AS54113	Fastly, Inc.	199.36.158.0/24	🇺🇸 United States	—

📧 MX Records5 records 65ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	172.253.152.27 2a00:1450:4010:c08::1a 2a00:1450:4010:c08::1a	yulpptr-in-f27.1e100.net lg-in-f26.1e100.net lg-in-x1a.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.aspmx.l.google.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1a	mad01s14-in-f27.1e100.net yukulwh-in-f27.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	3600s	alt3.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	alt4.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1a	tp-in-f27.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	perfk.dk → 199.36.158.100
🔶 Autoconfig	perfk.dk → 199.36.158.100

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 191ms

TXT Record
google-site-verification=swKiVimtOe-5wHhBsuBfxdnVIThGudk4e0OdGX8SCWM
v=spf1 include:_spf.google.com include:_custspf.one.com ~all

✉️ SPF

Policy	Record (perfk.dk)
~all (soft fail)	v=spf1 include:_spf.google.com include:_custspf.one.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.perfk.dk	perfk.dk

🔗 TLSA / DANE

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

🔐 DNSSEC88ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081101
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

48ms

A

39ms

MX

65ms

AAAA

31ms

TXT

191ms

CAA

45ms

HTTPS

41ms

TLSA

167ms

SOA

0ms

MTA-STS

61ms

DNSSEC

88ms

SRV

72ms

Total

3117ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-03 22:41:01	775ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-25 04:31:59	3117ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-12 02:49:44	4836ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-10 20:46:30	5370ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-17 23:35:49	1822ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-14 14:59:11	5318ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-12 08:19:33	1441ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-03 12:52:21	4786ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-20 00:12:45	1089ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-17 14:34:55	2222ms	2 NS 1 A 5 MX	🔒 Secure	View