| npa-nxx | State/Province | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 301-551 | MD | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 0008104507 | RMD0004516 | 8697 | WSHNGTNZN3 | LARLMDEH00T | 00/00/0000 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
