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.
Briarwood meets Jamaica Hills to the east at 164th Street, and Kew Gardens to the west at Queens Boulevard/Van Wyck. The Post Office considers Briarwood's zip code (11435) part of Jamaica, but the neigborhood is distinct from downtown Jamaica, which is south of Hillside Avenue. Check Briarwood's location on a map.