The creation of 828 was intended as a long-term solution. Within two years, however, 704 was close to exhaustion once again due to Charlotte’s continued growth, as well as the continued proliferation of cell phones and pagers.
To solve the problem, it was decided to assign 980 to Charlotte as North Carolina’s first overlay. 980 entered service on May 1, 2000. On that date, a permissive dialing period began in which both 7- and 10-digit calls were both allowed. As of January 10, 2001, 10-digit dialing was mandatory. The first 980 numbers were assigned on February 10, 2001.
Even with the Charlotte area’s continued growth, the 704/980 numbering pool is nowhere near exhaustion. Under the most recent NANP projections, the Charlotte area will not need another area code until at least mid-2047.
Years after the introduction of mobile number portability, a number of cell phone customers on the South Carolina side of the Charlotte area have 704 numbers.