[{"data":1,"prerenderedAt":211},["ShallowReactive",2],{"page:\u002Fen\u002Fscanner":3},{"id":4,"title":5,"body":6,"description":203,"extension":204,"meta":205,"navigation":206,"path":207,"seo":208,"stem":209,"__hash__":210},"pages\u002Fen\u002Fscanner.md","The Achtcijfers scanner",{"type":7,"value":8,"toc":200},"minimark",[9,30,56,88,101,129,145,179],[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? Mail us, as described below.",[31,146,147,152,155,158,167],{},[14,148,149],{"v-slot:title":16},[18,150,151],{},"Keep your domain out",[18,153,154],{},"Mail us the domain name. We then stop scanning the domain, its subdomains included, and remove what we have on it.",[18,156,157],{},"Mail from an address on that domain if you can. Then we can see the request comes from the owner. We reply within [period].",[18,159,160,161,166],{},"Is it about your company, under its KVK number? That is on ",[162,163,165],"a",{"href":164},"\u002Fen\u002Fyour-company","Your company in Achtcijfers",".",[14,168,169],{"v-slot:proof":16},[170,171,176],"mail-request",{"body":172,"label":173,"subject":174,"to":175},"Domain: [domain]\nI want: [you to stop scanning it and remove what you have \u002F to ask about your traffic]\n","Mail us","My domain and the Achtcijfers scanner","abuse",[18,177,178],{},"A person replies.",[31,180,181,186,193],{},[14,182,183],{"v-slot:title":16},[18,184,185],{},"Too much traffic, or something wrong",[18,187,188,189,192],{},"Seeing more traffic from us than this page describes, or something you don't expect? Mail ",[190,191],"site-fact",{"fact":175}," with your domain and the time. We reply within [period].",[18,194,195,196,166],{},"How we handle information about companies is on ",[162,197,199],{"href":198},"\u002Fen\u002Ftrust","Trust",{"title":16,"searchDepth":201,"depth":201,"links":202},2,[],"Saw achtcijfers-scanner in your logs? What the scanner reads, how often it comes and how to keep your domain out.","md",{},true,"\u002Fen\u002Fscanner",{"title":5,"description":203},"en\u002Fscanner","NC5is3pIbB0mJWoj0fFaikO9HyYjqRbwlol3SATO1iI",1793465541135]