I know Druff is into this stuff as well, so sharing. My long time opinion on these topic is to stop making new area codes and instead make the existing phone numbers 8 digits instead. Better to expand the the whole number by 1 than 3 and not need to keep adding new area codes.
Any ways, the new area code is 738.
https://www.foxla.com/news/los-angel...pq0qm6n97yk2c9