# Local Number Portability Porting Interval and Validation Requirements; Telephone Number Portability; Numbering Resource Optimization
> **Federal Communications Commission** · Final rule. · Published 2015-05-26 · Effective 2015-06-25 · 80 FR 29978
## Document
- **Document number:** 2015-12633
- **Category:** other
- **Federal Register citation:** 80 FR 29978
- **CFR reference:** 47 CFR 52
- **Publication date:** 2015-05-26
- **Effective date:** 2015-06-25
- **FCC docket:** WC Docket No. 07-244
## Abstract

In this document, the Federal Communications Commission (Commission) adopted several recommendations of the North American Numbering Council (NANC) pertaining to local number portability (LNP). Also, the Commission clarified that, notwithstanding the NANC's preference for area code overlays over area code splits, the states still have the option to choose the best means of implementing area code relief for their citizens.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/05/26/2015-12633/local-number-portability-porting-interval-and-validation-requirements-telephone-number-portability)
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