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35 prefixes in 240 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 240-200 | WSHNGTNZN2 | 071F | 2010-10-04 | Yes |
| 240-253 | WSHNGTNZN6 | 071F | — | Yes |
| 240-307 | EMMITSBURG | 071F | 2003-03-27 | Yes |
| 240-347 | HAGERSTOWN | 071F | 2008-08-04 | Yes |
| 240-366 | WILLIAMSPT | 071F | — | Yes |
| 240-428 | WSNGTNZN10 | 071F | — | Yes |
| 240-502 | WSHNGTNZN3 | 071F | — | Yes |
| 240-509 | WSNG238Z14 | 071F | 2008-03-31 | Yes |
| 240-569 | FLINTSTONE | 071F | 2017-09-22 | Yes |
| 240-594 | BITTINGER | 071F | 2018-05-15 | Yes |
| 240-617 | HIGHFIELD | 071F | 2015-07-16 | Yes |
| 240-621 | WSNGTNZN11 | 071F | — | Yes |
| 240-623 | WSHNGTNZN4 | 071F | 2014-12-08 | Yes |
| 240-630 | WSHNGTNZN2 | 071F | 2011-10-31 | Yes |
| 240-670 | WSHNGTNZN3 | 071F | — | Yes |
| 240-673 | WSHNGTNZN2 | 071F | 2019-05-17 | Yes |
| 240-734 | SMITHSBURG | 071F | 2012-03-22 | Yes |
| 240-763 | WSNG238Z15 | 071F | 2015-10-01 | Yes |
| 240-769 | KEEDYSVL | 071F | 2021-07-20 | Yes |
| 240-774 | LONACONING | 071F | 2015-10-05 | Yes |
| 240-775 | WESTERNPT | 071F | 2015-10-05 | Yes |
| 240-785 | OAKLAND | 071F | 2021-07-20 | Yes |
| 240-816 | KEEDYSVL | 071F | 2015-10-05 | Yes |
| 240-853 | LAUREL236 | 071F | 2021-09-28 | Yes |
| 240-881 | WSNG238Z13 | 071F | 2021-11-04 | Yes |
| 240-924 | MOUNT AIRY | 071F | 2022-02-10 | Yes |
| 240-932 | WSNG236Z14 | 071F | 2022-06-30 | Yes |
| 240-937 | GAITHERSBG | 071F | 2022-07-22 | Yes |
| 240-939 | WSNGTNZN11 | 071F | 2022-07-26 | Yes |
| 240-940 | WSHNGTNZN4 | 071F | 2022-07-26 | Yes |
| 240-941 | WSHNGTNZN2 | 071F | 2022-08-03 | Yes |
| 240-948 | LEONARDTN | 071F | 2022-08-25 | Yes |
| 240-955 | LA PLATA | 071F | 2022-08-25 | Yes |
| 240-957 | DAMASCS236 | 071F | 2022-08-25 | Yes |
| 240-963 | WSHNGTNZN3 | 071F | 2022-10-18 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.