reply to DKYang
Re: Question about porting number from Verizon to Vonage You really need to check with Verizon regarding ETF.
But do NOT notify Verizon that you are porting. The NEW company (eg Vonage) is the company that handles porting.
Big exception: If you currently have HSI (DSL) service with Verizon, you need to make sure they don't disconnect the entire service when you port your number.