The 518 numbering plan area is the only one of New York's original five NPAs that still has its original boundaries. Despite the presence of the Capital District, this part of New York is not as densely populated as the rest of the state. As a result, even with the proliferation of cell phones and pagers (particularly in the Capital District and Glens Falls), it was one of the few remaining original area codes not counting those serving an entire state, that had not been split or overlaid. By the spring of 2016, however, 518 was on the verge of depletion of available central office codes to create more telephone numbers and it was projected that the region would need another area code by 2019.1 By the autumn, however, it was anticipated that 518 would be depleted during the third quarter of 2017. An additional area code, 838, was approved to be implemented during the autumn of 2017.23
From March 18 to August 19, 2017, telephone calls could be made using seven digits or ten digits (area code + seven digit number). Ten-digit dialing became mandatory on August 20, 2017, with recorded messages reminding callers if they dialed incorrectly. On September 19, 2017, area code 838 was activated, making this the second overlay in the upstate region.4
"Home | NANPA" (PDF). Archived (PDF) from the original on 2016-09-11. Retrieved 2016-08-31. https://www.nationalnanpa.com/pdf/NRUF/Changes_from_April2016_NRUF_Forecast.pdf ↩
Anderson, Eric (September 15, 2016). "Another three digits to join the 518". Times-Union. Albany, N.Y.: Hearst. Archived from the original on September 19, 2016. Retrieved October 2, 2016. http://www.timesunion.com/business/article/New-area-code-to-overlay-the-518-9225162.php ↩
Rulison, Larry (September 20, 2016). "Capital Region, say hello to area code 838". Times-Union. Albany, N.Y.: Hearst. Archived from the original on October 3, 2016. Retrieved October 2, 2016. http://www.timesunion.com/business/article/Capital-Region-say-hello-to-area-code-838-9234661.php ↩
Farrell, Michael P. "New 838 area code will be phased in starting this month" Archived 2017-09-26 at the Wayback Machine. Albany Times Union. Retrieved September 25, 2017. http://www.timesunion.com/allwcm/article/New-838-area-code-will-be-phased-in-starting-this-10980455.php ↩