47 CFR Part 52
NUMBERING
February 16, 2021
Subpart
A
Scope and Authority
Subpart
B
Administration
Subpart
C
Number Portability
Subpart
D
Toll Free Numbers
Subpart
E
Universal Dialing Code for National Suicide Prevention and Mental Health Crisis Hotline System
Appendix
Deployment Schedule for Long-Term Database Methods for Local Number Portability
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