Does a SSL need a Dedicated IP Address?

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Short Answer: No, not at all

Long Answer: SSL was released in the 90's, when every website has it's own IP address. At that time, a SSL certificate was tied to an IP address for this reason. Around 2000, we started running out of available IP addresses. A technology called virtual hosts was invented to allow multiple websites to share the same IP address, but still be recognised as individual websites by the internet. A technology called SNI followed this. SNI allows websites to have their own SSL certificate without the need of a dedicated IP address. While it was released in 20006, SNI started to be commonly used in 2011 when CentOS (the Opperating System that runs most web servers) began to support the technology.

 

You can read more about SNI here: https://en.wikipedia.org/wiki/Server_Name_Indication

 

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