528
Area code
Non geographic
Non geographic code, in service since 2022-03-02. Part of the 500/533/544/566/577/588/521/522/523/524/525/526/527/528/529/532/538/542 overlay complex — ten-digit dialing required.
Split from 500. Overlaid with 500, 521, 522, 523, 524, 525, 526, 527, 529, 532, 533, 538, 542, 544, 566, 577, 588 .
Statusin service
Introduced2022-03-02
Local dialingNA
Time zoneEastern
Last verified2026-09-17
Change history
Recorded events for this NPA- 2022-03-02 Assigning from NPA 528 for Non-Geographic Services other
- 2022-02-11 Assignment of NPA 528 for Non-Geographic Services new npa
- 2022-03-02Area code 528 entered service (created from 500).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-03-02 | PL-585 ↗ | Assigning from NPA 528 for Non-Geographic Services |
| 2022-02-11 | PL-580 ↗ | Assignment of NPA 528 for Non-Geographic Services |