538
Area code
Non geographic
Non geographic code, in service since 2025-10-28. 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, 528, 529, 532, 533, 542, 544, 566, 577, 588 .
Statusin service
Introduced2025-10-28
Local dialingNA
Time zoneEastern
Last verified2026-09-17
Change history
Recorded events for this NPA- 2025-10-28 Assigning from NPA 538 for Non-Geographic Services other
- 2025-07-02 Assignment of NPA 538 for Non-Geographic Services new npa
- 2025-10-28Area code 538 entered service (created from 500).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2025-10-28 | PL-633 ↗ | Assigning from NPA 538 for Non-Geographic Services |
| 2025-07-02 | PL-631 ↗ | Assignment of NPA 538 for Non-Geographic Services |