Is there a global HS Code? No. You should know exactly what the specific number in your specific country. But the first 6 digit numbers are supposed the same across the whole world. Each country can modify by adding two digits or four digits as per their requirements without changing first six digits.
BLENHEIM, in Hanover, is a place-name found also in Manchester, and originates from Bavaria, Germany. Blenheim (in Germany) was a site of a great battle, which no doubt led to use of the name in Jamaica.
There are 12 other cities with populations of over 10,000 residents. Surprisingly, Jamaica only has three officially desginated cities -- Kingston, Portmore and Montego Bay. The country also has three counties that are subdivided into 14 parishes. Jamaica's population is primarily located within the urbanized cities.