Many voip services just fucking make up a number (or derive it somehow, but incorrectly) when numbers show as blocked or 'unknown' on normal lines. It's incredi

Many voip services just fucking make up a number (or derive it somehow, but incorrectly) when numbers show as blocked or 'unknown' on normal lines. It's incredibly misleading and annoying, so even legitimate calls from blocked numbers get people calling some random person back.