Sites that require phone number verification often block numbers allocated for VoIP services for fear of spammers. YMMV if you've tethered your GV number to a physical device at some point.

I've run into this semi-frequently over the years, and it's always extremely frustrating when it happens, but somehow I can't remember exactly where either.

Old references online point to Facebook, Line, and Snapchat: https://www.reddit.com/r/Googlevoice/comments/3uv3mt/google_...

I can back this claim up. I was unable to verify my Citi credit card over the phone using my Google Voice number, they insisted on a non-VoIP number which ultimately delayed the verification process by a week.

FWIW I may have just signed up at the right time, but both my Facebook and Snapchat are tied to my GV number and I've never had any issues.

I don't remember honestly, but I was looking for a site to do my taxes when I saw the last one. I didn't finish signing up. It mentioned not supporting "voice over IP" numbers, or something to that effect. I wish I'd taken a screenshot.

It’s happened to me a few times with my Gvoice number. Which is really annoying because this is why I use it.

It usually gives no specific information about why it failed, but then I use my main mobile number and it works fine.

It used to happen for me on Telegram (I think it's been fixed within the last year though), and recently a startup (Mealplan) blocked it because it's a "voip" number. I even tried emailing and explaining, but they just said they don't support it.

Tinder won't accept Google Voice numbers. That kept me off their platform for years.

Microsoft won't take any known voip account for an Azure registration, which created a minor challenge for me as all my numbers are google voice only as well.

Craigslist is one recent example that I came across.

Another is Credit Karma. And others have said Zelle no longer allows it.

Would love if someone made a list so those that have moved to VoIP wouldn’t need to waste time.

WhatsApp.