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.
02130 is a densely populated, upscale urban zip code in Jamaica Plain, Massachusetts. The population is racially diverse, and mostly single. At $394,400 the average home value here is a bit higher than average for the Boston-Cambridge-Quincy metro area, so this probably isn't the place to look for housing bargains.