npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
410-523 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | BALTIMORE | BLTMMDMDDS0 | 00/00/0000 | Prefix Type: RBOC Switch Name: MADISON Switch Type: NTDMS100 LATA: Baltimore MD (238) Tandem: N/A Detailed Switch Info |