Some time back, the city placed a new type of oval street sign at many of the town’s intersections. These new signs show the street name, the direction of traffic flow (as indicated by arrows), the zip code (codigo postal) and the name of the colonia where the sign is located.
The problem with the signs, though, is that there was some miscommunication between the department of the government that erected the signs and the post office, so in some cases the zip codes printed on the signs do not coincide with the zip code the post office recognizes as the one for that colonia. Some colonias have their own zip code and others share a zip code with one or more other colonias.
Here is a current list of the zip codes used in Cozumel. The second page is the map of their respective location.
Zip codes of Cozumel