An IP address is an ip address. Your applications don't know what's private, and what's public. If you have space, you might even have some subnets which are "internal" and some which are "externally" accessible - controllable with the usual routing controls, firewalls, etc.

What is the difference between a bridge and a router? Bridge traffic is non-routable, meaning data cannot move outside of the joined networks, or domain. Now, let's dissect the difference between a bridge and router. A router also connects two LANs and moves traffic via IP addresses. Routers have the intelligence to determine the next network point if the address is not within its managed pool of routing - What is a "routable" IP? - Network Engineering What is a “routable” IP? IP addresses can be divided into serveral categories. Routable on the public Internet. Routable on private networks but not on the public Internet; Not routable at all. People often say "routable" when they mean "publically routable" and "non-routable" when they mean "not publically routable"

Non-Routable Address Space - The Network Layer | Coursera

IPv4 Private Address Space and Filtering - American

What is a nonroutable IP address - Answers

What is the difference between routable and non- routable Routable protocols can be used to send data between networks and these protocols contains device address(i.e.:MAC Adress) and network addresses (i.e.:IP Address). and it can be routed any where. these protocols are used in layer3 devices (Routers). example:TCP/IP, Apple talk, SNA Non-Routable protocols can be used send data inside the network.