[{"data":1,"prerenderedAt":206},["ShallowReactive",2],{"page:\u002Fen\u002Fscanner":3},{"id":4,"title":5,"body":6,"description":197,"extension":198,"meta":199,"navigation":200,"noindex":201,"path":202,"seo":203,"stem":204,"__hash__":205},"pages\u002Fen\u002Fscanner.md","The Achtcijfers scanner",{"type":7,"value":8,"toc":194},"minimark",[9,30,56,88,101,129,145,172],[10,11,13,20],"page-head",{"updated":12},"24 October 2026",[14,15,17],"template",{"v-slot:title":16},"",[18,19,5],"p",{},[14,21,22],{"v-slot:lead":16},[18,23,24,25,29],{},"Saw ",[26,27,28],"code",{},"achtcijfers-scanner"," in your logs? That's us. Here is what the scanner reads and how to keep your domain out.",[31,32,33,38,41,44,53],"page-section",{},[14,34,35],{"v-slot:title":16},[18,36,37],{},"What the scanner is",[18,39,40],{},"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.",[18,42,43],{},"You can tell it by this user agent:",[45,46,51],"pre",{"className":47,"code":49,"language":50,"meta":16},[48],"language-text","achtcijfers-scanner\u002F0.1 (+https:\u002F\u002Fachtcijfers.nl\u002Fscanner; abuse: [abuse-adres])\n","text",[26,52,49],{"__ignoreMap":16},[18,54,55],{},"We are still choosing the abuse address. Until then it is shown here in brackets.",[31,57,58,63,66,85],{},[14,59,60],{"v-slot:title":16},[18,61,62],{},"What the scanner reads",[18,64,65],{},"A few public pages per site, and no more:",[67,68,69,73,76,79,82],"ul",{},[70,71,72],"li",{},"the start page;",[70,74,75],{},"at most six pages where a company puts its details: contact, about, terms, privacy, imprint, vacancies and team;",[70,77,78],{},"robots.txt and the sitemaps;",[70,80,81],{},"a vacancy feed the site itself links to;",[70,83,84],{},"the domain's DNS records and the site's certificate.",[18,86,87],{},"From a team page we only count how many people are on it, without names.",[31,89,90,95,98],{},[14,91,92],{"v-slot:title":16},[18,93,94],{},"How often and how gently",[18,96,97],{},"We look at an active site about once a month. A parked site, or one that doesn't answer, less often.",[18,99,100],{},"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.",[31,102,103,108,122],{},[14,104,105],{"v-slot:title":16},[18,106,107],{},"What the scanner never does",[67,109,110,113,116,119],{},[70,111,112],{},"Log in.",[70,114,115],{},"Fill in or submit forms.",[70,117,118],{},"Run JavaScript: it reads the HTML as your server sends it.",[70,120,121],{},"Build profiles of people.",[18,123,124,125,128],{},"An e-mail address a site hides, for example as ",[26,126,127],{},"info(at)example.nl",", is kept only when it is a generic address such as info@. Never a personal one.",[31,130,131,136,139,142],{},[14,132,133],{"v-slot:title":16},[18,134,135],{},"robots.txt",[18,137,138],{},"The scanner reads your robots.txt and records what it allows. It does not follow it yet.",[18,140,141],{},"[Our robots.txt policy, after the legal review.]",[18,143,144],{},"Want to be sure we skip your domain? Send us a message, as described below.",[31,146,147,152,161,164],{},[14,148,149],{"v-slot:title":16},[18,150,151],{},"Keep your domain out",[18,153,154,155,160],{},"Send us the domain name via ",[156,157,159],"a",{"href":158},"\u002Fen\u002Fcontact","Contact",". We then stop scanning the domain, its subdomains included, and remove what we have on it.",[18,162,163],{},"Send it from an address on that domain if you can. Then we can see the request comes from the owner. We reply within [period].",[18,165,166,167,171],{},"Is it about your company, under its KVK number? That is on ",[156,168,170],{"href":169},"\u002Fen\u002Fyour-company","Your company in Achtcijfers",".",[31,173,174,179,187],{},[14,175,176],{"v-slot:title":16},[18,177,178],{},"Too much traffic, or something wrong",[18,180,181,182,186],{},"Seeing more traffic from us than this page describes, or something you don't expect? Mail ",[183,184],"site-fact",{"fact":185},"abuse"," with your domain and the time. We reply within [period].",[18,188,189,190,171],{},"How we handle information about companies is on ",[156,191,193],{"href":192},"\u002Fen\u002Ftrust","Trust",{"title":16,"searchDepth":195,"depth":195,"links":196},2,[],"Saw achtcijfers-scanner in your logs? What the scanner reads, how often it comes and how to keep your domain out.","md",{},true,false,"\u002Fen\u002Fscanner",{"title":5,"description":197},"en\u002Fscanner","A3jK7kAT4cxGLy4OzbX54RiwBWYokXq_3DC_7yVLWZU",1793530944892]