请问HN：为什么这么多服务在注册时拒绝使用Google Voice号码？
我注意到越来越多的公司在创建账户时拒绝接受Google Voice号码。我的公司的主线是一个Google Voice号码，转接到我的手机上；我从不提供我的手机号码。但这使我无法使用一些服务和产品（如Vercel、DocuSign等）。
我很好奇背后的原因。这主要是技术原因（防止垃圾邮件、可送达性问题）、商业驱动（运营商对VoIP的抵制），还是仅仅是阻止一次性账户的一种简单方式？是否有更为反乌托邦的情况，比如如果我提供我的手机号码，是否会有某种幕后查找我的“真实”信息？
此外，如果有人了解公司如何在大规模上技术性地检测和过滤VoIP号码，我也很想了解这方面的信息。例如，通过Twilio的查找信息导致号码被拒绝的原因是什么？我猜是来自Twilio线路类型智能（或同类服务）的“类型”信息？
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I’ve noticed that more and more companies refuse to accept Google Voice numbers when creating accounts.<p>My company's main line is a Google Voice that forwards to my cell; I never give out my cell. But this is preventing me from using some services and products (Vercel, DocuSign, etc.)<p>I’m curious about the reasons behind this. Is it primarily technical (spam prevention, deliverability issues), business-driven (carriers pushing back on VoIP), or just an easy way to block disposable accounts? Is something more dystopian going on, like some kind of behind-the-scenes lookup of my "true" info if I provide my cell?<p>Also, if anyone has insight into how companies technically detect and filter VoIP numbers at scale, I’d love to understand that side too. E.g. what lookup info via Twilio causes a number to get rejected? I assume it is the 'type' from Twilio Line Type Intelligence (or equivalent)?<p>https://www.twilio.com/docs/lookup/v2-api/line-type-intelligence