538 Area Code
Personal communications services
The 538 area code is reserved for special services (Non-Geographic Services). Numbers in it are used for personal communications services in the 5YY non-geographic pool.
How 538 is used
Numbers in 538 are used for personal communications services such as one-number follow-me forwarding. The called party (the subscriber) pays for the call while the calling party is billed at standard long-distance rates. All 5YY codes share the same purpose and pool of central-office assignments.
- Purpose
- Personal communications services
- Assignee
- NANPA on behalf of the FCC
- Dialed as
- 1-538-NXX-XXXX
History
Creation: Area code 538 was placed into service on October 28, 2025 as the seventeenth 5YY non-geographic NPA, relieving 532. NANPA assigned it in July 2025, and it was activated within months as demand for non-geographic numbers continued.
Relieved: Area code 538 was activated to relieve 532.
Mnemonics: The digits 538 map to letter combinations on the standard telephone keypad, yielding 27 possible three-letter mnemonics. Prior to 1995, the middle digit of area codes was restricted to 0 or 1 — codes created before then cannot form mnemonics.
Sources: en.wikipedia.org/wiki/Personal_communications_service_(NANP), www.nanpa.com/numbering/5xx-nxx-codes.
Other special-use area codes
Same-category codes first, then the rest of the NANP special-use portfolio.
Frequently Asked Questions
What is area code 538 used for?
538 is a special-use area code in the North American Numbering Plan. The 538 area code is reserved for special services (Non-Geographic Services). Numbers in it are used for personal communications services in the 5YY non-geographic pool.
How is 538 dialed?
Numbers in 538 are dialed as a full ten-digit number (1-538-NXX-XXXX). It is a non-geographic area code, so 1-538 numbers are not tied to any city or state.
Who assigns 538 numbers?
NANPA on behalf of the FCC
What did 538 relieve or replace?
Area code 538 was activated to relieve 532 as that pool of numbers neared exhaustion.
When did area code 538 go into service?
Area code 538 was placed into service on October 28, 2025. It was the 17th 5YY non-geographic area code.