The way the system used to be in the USA, area codes only had 0 or 1 in middle of it. So only +120 & +121 would do USA until they shifted in 1995 to have USA ar

The way the system used to be in the USA, area codes only had 0 or 1 in middle of it. So only +120 & +121 would do USA until they shifted in 1995 to have USA area codes w other numbers in the middle. I'll guess any of those little islands only get subsets of the number space to maintain comparability. Once I almost got ripped off fromthis, someone called an adult number w a domestic area code that went to Guyana in South America. I had American Long Lines block all foreign and all pay numbers, they knew if was a foreign porn number and tried to get their cut. I refused as they knew it was international and worse they knew it was porn. I knew to block as my roommate was still in college and I assumed issues would arise with out those blocks.