atcomp.cz

.cz crawl dns

First seen 2026-05-29 · Last seen 2026-05-31 · ok HTTP/1.1 200 1324 ms crawled 2026-05-31

CZ · 81.30.226.132 · AS15935 ha-vel internet s.r.o.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: AT Computers
Language: en

Technology

Server: Microsoft-IIS
ASP.NET: 4.0.30319
jQuery: 1.9.1 known XSS (<3.5)
Stack: ASP.NET

Analytics

Google Tag Manager

Third-party hosts loaded (2)

www.google.com×1
www.googletagmanager.com×1

Social

Contact

Email

obchod@atcomp.cz

Phone

DNS records live

NS

ns2.ha-vel.cz
ns3.ha-vel.com
ns6.atcomp.cz

MX

10 mx5.atcomp.cz
20 mx3.atcomp.cz

TXT

MS=C0D7EABD1BBEE7A268113A0FBDA597D6A5ADEE47

Verified for

Apple
Cisco
Google
Microsoft 365

Email authentication partial

SPF: v=spf1 ip4:81.30.228.34 ip4:193.85.25.25 include:spf.smartemailing.cz include:spf.protection.outlook.com a mx ~all
softfail (~all)
DMARC: v=DMARC1; p=none; rua=mailto:dmarc+10068@smartemailing.cz; fo=1; aspf=r
policy: none (monitoring only)
DKIM: no key found at common selectors

Certificate (current)

DigiCert EV RSA CA G2

from 2025-12-01 to 2026-12-23

Expires in 205 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.atcomp.cz/AtcHomeSite/Index

present

strict-transport-security
content-security-policy
x-frame-options

findings

weak frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: SAMEORIGIN, SAMEORIGIN
content-security-policy: frame-ancestors 'self'
strict-transport-security: max-age=31536000; includeSubDomains