Reference Data Rate Center Directory XXXXXXXXXX, MD Rate Center XXXXXXXXXX — MD Data last updated: March 10, 2026 LATA 999 State MD Area Codes 6 Exchanges (NXX) 52 Carriers 1 Coordinates 2.4728290379151123, -6.133568697553534 Area Codes 227 240 301 410 443 667 Top Carriers Carrier OCN NXX Count VERIZON MARYLAND, INC. 9212 1