blackcats.dk DNS records

🖥️ Nameservers2 records 62ms

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
195.47.247.18	3600s	one.com.webforward.g1i.one	AS51468	One.com A/S	195.47.247.0/24	—	—

📧 MX Records2 records 61ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	1600s	mx1.improvmx.com	13.37.195.136 15.236.236.160 2a05:d012:412:e201:88aa:e7b9:7a43:12d7 2a05:d012:412:e202:f36:2c1f:1a49:d38a 2a05:d012:412:e203:373a:f51a:4a85:1d25 35.181.18.45	ec2-13-37-195-136.eu-west-3.compute.amazonaws.com ec2-15-236-236-160.eu-west-3.compute.amazonaws.com — — — ec2-35-181-18-45.eu-west-3.compute.amazonaws.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
20	1800s	mx2.improvmx.com	13.36.107.63 13.36.222.39 15.236.61.92 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678 2a05:d012:412:e202:e81e:cc44:3b53:8a3d 2a05:d012:412:e203:7e33:3d9c:28d7:ee20	ec2-13-36-107-63.eu-west-3.compute.amazonaws.com ec2-13-36-222-39.eu-west-3.compute.amazonaws.com ec2-15-236-61-92.eu-west-3.compute.amazonaws.com — — —	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	195.47.247.18
🔶 Autoconfig	195.47.247.18

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 250ms

TXT Record
v=spf1 include:spf.improvmx.com ~all

✉️ SPF

Policy	Record (blackcats.dk)
~all (soft fail)	v=spf1 include:spf.improvmx.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

🔗 TLSA / DANE

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

🔐 DNSSEC141ms

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

62ms

A

39ms

MX

61ms

AAAA

65ms

TXT

250ms

CAA

75ms

HTTPS

46ms

TLSA

82ms

SOA

0ms

MTA-STS

88ms

DNSSEC

141ms

SRV

85ms

Total

1100ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 05:26:44	1100ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-13 10:50:50	2466ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-11 08:36:44	5564ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-18 08:02:50	1776ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-16 01:31:22	1270ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-07 01:18:11	1781ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-25 00:53:52	9736ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-22 21:02:12	732ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-20 02:06:15	500ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-16 14:45:43	2547ms	2 NS 1 A 2 MX	🔒 Secure	View