(Houston, TX) -- Harris County will get a new area code next month. Internet and phone provider Consolidated Communications says the new 621 area code will be in use starting on January 23rd. The new area code will be available to customers in the Greater Houston overlay region, where the area codes 713, 281, 832, and 346 are already in effect. Nobody's phone number will change, because the 621 code will be assigned to new service or additional lines.