NPAs in service from Sunday, April 11, 2021
| NPA | Country | Time Difference (From GMT) | State | State Abbrv. | Service Date | Comments |
| 227 | USA | -5 | Maryland | MD | | Proposed |
| 283 | USA | -5 | Ohio | OH | | Suspended |
| 447 | USA | -6 | Illinois | IL | | Proposed |
| 464 | USA | -6 | Illinois | IL | | Proposed |
| 557 | USA | -5 | Missouri | MO | | Suspended |
| 659 | USA | -6 | Alabama | AL | | Proposed |
| 679 | USA | -5 | Michigan | MI | | Proposed |
| 689 | USA | -5 to -6 | Florida | FL | | Suspended |
| 730 | USA | -6 | Illinois | IL | | Proposed |
See World Zone 1 for explanation of "NPA"
Where shown:
| Time Diff. |
is with respect to GMT (UCT) |
Suspended
Pending
Proposed |
indicate the code is not in use: the "Service Date" has been delayed or not set |
| Service Date |
is the date code becomes (or became) effective. If no date is shown, the code was introduced before 1995 |