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twofactorauth
List of sites with two factor auth support which includes SMS, email, phone calls, hardware, and software.
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That said, where possible, 2FA should not rely on a phone number. SMS and Voice are unauthenticated and unencrypted. It's easy and cheap enough to setup a stingray to grab all text messages in an area, and SIM swap attacks are also typically pretty easy (difficulty varies by provider from incredibly simple to might require calling back a few times to get the right rep). Switch to an authenticator app for anything that supports it (https://twofactorauth.org/).