The Achtcijfers scanner

Achtcijfers shows what a company does and uses, under its KVK number. For that, our scanner looks at Dutch websites the way a visitor sees them.

You can tell it by this user agent:

achtcijfers-scanner/0.1 (+https://achtcijfers.nl/scanner; abuse: [abuse-adres])

We are still choosing the abuse address. Until then it is shown here in brackets.

A few public pages per site, and no more:

• the start page;
• at most six pages where a company puts its details: contact, about, terms, privacy, imprint, vacancies and team;
• robots.txt and the sitemaps;
• a vacancy feed the site itself links to;
• the domain's DNS records and the site's certificate.

From a team page we only count how many people are on it, without names.

We look at an active site about once a month. A parked site, or one that doesn't answer, less often.

The scanner sends at most three requests at a time to one server, with a short pause between them. If your server asks us to slow down, with a 429 or a 503, we wait. After that, the server gets one request at a time, at least two seconds apart.

• Log in.
• Fill in or submit forms.
• Run JavaScript: it reads the HTML as your server sends it.
• Build profiles of people.

An e-mail address a site hides, for example as info(at)example.nl, is kept only when it is a generic address such as info@. Never a personal one.

The scanner reads your robots.txt and records what it allows. It does not follow it yet.

[Our robots.txt policy, after the legal review.]

Want to be sure we skip your domain? Mail us, as described below.

Seeing more traffic from us than this page describes, or something you don't expect? Mail [abuse-adres] with your domain and the time. We reply within [period].

How we handle information about companies is on Trust.