I use Hushed app. It gives me a phone number that I can use for WhatsApp and to receive SMS confirmation codes from various archaic services that still validate you thorough the insecure SMS. https://hushed.com/. - Source: Hacker News / 6 months ago

Have you tried a burner app (like https://hushed.com)? If you shop around you can find good deals, like a lifetime # on the cheap). Source: about 1 year ago

Hushed.com works in Canada, not free but not that expensive either. Source: over 1 year ago

Hushed (while privacy-focused) allows for multiple numbers across multiple devices, and has been around for a while. Source: over 1 year ago

In addition to all the standard features of any other cell phone (e.g., caller ID, call forwarding), the Hushed Lifetime Number subscription also includes some great additional features such as custom voicemail greetings, text message alerts when someone has left you a voicemail, international calling rates that are among some of the lowest in the industry, and more! Plus, because it works over Wi-Fi or cellular... Source: over 1 year ago

Get a virtual mailbox service. Examples include ipostal1.com or anythimemailbox.com. You may also choose to get a U.S. Postal service postbox that only you know or have the key to at https://www.usps.com/manage/po-boxes.htm. You can ask a trusted friend to receive mail for you for important correspondence like from government sources. Source: 12 months ago

I did some research and think I've narrowed it down to https://www.anytimemailbox.com/ or https://ipostal1.com/. Source: about 1 year ago

I use https://ipostal1.com/. They can scan or forward docs. I also transferred my phone number to Google voice. Source: about 1 year ago

Ipostal1- I know this is a popular one. Digital mailbox service that lets you choose a mailing address for business or personal use. My only gripe is that you need to fill out a notarization form for each address you use. Source: over 1 year ago

Use a virtual mailing address. It's essentially a PO Box but some also have a physical location to receive mail. I use ipostal1.com for $9/month. Source: over 1 year ago