543 Area Code
Personal communications services
The 543 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 543 is used
Numbers in 543 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
- 1-543-NXX-XXXX
History
Creation: Area code 543 was placed into service on September 21, 2026 as the nineteenth 5YY non-geographic NPA, relieving 542. NANPA assigned it in July 2026, and it is the newest code in the 5YY pool.
Relieved: Area code 543 was activated to relieve 542.
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.
Frequently Asked Questions
What is area code 543 used for?
The 543 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 543 dialed?
Dial 1-543-NXX-XXXX.
Who assigns 543 numbers?
NANPA on behalf of the FCC
What did 543 relieve or replace?
Area code 543 was activated to relieve 542 as that pool of numbers neared exhaustion.
When did area code 543 go into service?
September 21, 2026. It was the 19th 5YY non-geographic area code.