---
kind: "section"
citation: "49 C.F.R. § 220.29"
title: "49"
number: "220.29"
heading: "Statement of letters and numbers in radio communications."
url: "https://uscodex.org/cfr/49/220.29"
---

# §220.29. Statement of letters and numbers in radio communications.

- (a) If necessary for clarity, a phonetic alphabet shall be used to pronounce any letter used as an initial, except initial letters of railroads. See appendix A of this part for the recommended phonetic alphabet.
- (b) A word which needs to be spelled for clarity, such as a station name, shall first be pronounced, and then spelled. If necessary, the word shall be spelled again, using a phonetic alphabet.
- (c) Numbers shall be spoken by digit, except that exact multiples of hundreds and thousands may be stated as such. A decimal point shall be indicated by the words “decimal,” “dot,” or “point.” (See appendix B to this part, for a recommended guide to the pronunciation of numbers.)

## Notes

### Authority

Authority: 49 U.S.C. 20102-20103, 20103 note, 20107, 21301-21302, 20701-20703, 21304, 21311; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 63 FR 47195, Sept. 4, 1998, unless otherwise noted.