An IP address is a set of numbers given to an electronic device on a computer network. This can be compared to a home address like your house or apartment.
An IP address is what allows electronic devices communicate with each other.
Technically no, they are all different but there are some that are reserved for private home routers. These reserved IP addresses are called "Private addresses" and are the most commonly known by consumers.
Theses address range from:
192.168.0.1 - 192.168.255.254 (range of 65536)
184.108.40.206 - 172.31.255.254 (range of 1048576)
10.0.0.1 - 10.255.255.254 (range of 16777216)