The World VTS Guide is a site maintained by a triad of organization including the International Association of Lighthouse Authorities (IALA-AISM), the International Maritime Pilots Association, and the International Association of Ports and Harbors. The Guide lists all VTS areas around the world along with VTS specific information and user manuals.

As described on the World VTS Guide site:

The World VTS Guide has been designed to give Masters, navigators, and interested persons, clear and concise diagrammatic and written information regarding the navigational requirements of the VTS Centres of the world. Particular attention has been paid to communications requirements, the World VTS Guide being designed to be used in close proximity to the on-board VHF set.

The World VTS Guide Homepage
The U.S. listings in the World VTS Guide