The GSMA has recently launched PathFinder Number Portability Discovery, a GSMA-managed service for global number portability. Operated by Neustar, the new service encompasses 2.2 billion telephone numbers impacted by number portability worldwide! And that figure is expected to rise rapidly, with China and India coming on board. At the moment, number portability is implemented in over 52 countries around the world.
From the press release:
PathFinder was created by the GSMA to provide an interoperable, industry-wide solution that enables the routing of global IP service interconnect traffic. The new Number Portability Discovery service will make use of PathFinder’s extensive number portability database, which provides access to all national numbering plans and number portability information, where available, throughout the world. With adaptable and extensible interfaces, the service can rapidly incorporate new number portability data for countries coming on line or that plan to implement number portability in the future.
The service is designed to make it simple for carriers, service providers and hubs to improve their voice, SMS and MMS commercial/technical performance in the presence of number portability challenges… You can get bit more details from a dedicated website.