Skype alternatives to call landlines?

I need an alternative app to call overseas landlines cheaply

I used to rent a skype number and have it on my phone while I travel abroad, and pay to make any calls to/from overseas

Now that skype is gone I don't know what is everybody's best choice

Hi. No number currently, but try this:
https://www.connect-ez.com/pay-as-you-go-international-calling/

Have you tried Viber Out?