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Icom CTCSS Tone Chart

Freq. Code Icom Tone # Others H16 / U16 67.0 XZ 1 1 71.9 XA 2 2 74.4 WA 3 3 77.0 XB 4 4 79.7 WB 1 5 5 82.5 YZ 6 6 85.4 YA 7 7 88.5 YB 8 8 91.5 ZZ 9 9 94.8 ZA 10 10 97.4 ZB 11 Missing 2 100.0 1Z 12 11 103.5 1A 13 12 107.2 1B 14 13 110.9 2Z 15 14 114.8 2A 16 15 118.8 2B 17 16 123.0 3Z 18 17 127.3 3A 19 18

Freq. Code Icom Tone # Others H16 / U16 131.8 3B 20 19 136.5 4Z 21 20 141.3 4A 22 21 146.2 4B 23 22 151.4 5Z 24 23 156.7 5A 25 24 162.2 5B 26 25 167.9 6Z 27 26 173.8 6A 28 27 179.9 6B 29 28 186.2 7Z 30 29 192.8 7A 31 30 203.5 M1 32 31 210.7 M2 33 32 218.1 M3 34 33 225.7 M4 35 34 233.6 M5 36 35 241.83 M6 37 36 250.33 M7 38 37 254.13 0Z4 39 Missing2

Notes:
WB ¹: On some tone charts the label "WB" is replaced with "SP".

Missing ²: The H16 and U16 were Icoms first microprocessor controlled radios with an integrated CTCSS encoder. The design has one flaw: they forgot the 97.4hz tone, and all tones above that frequency are moved down one number - i.e. tone 11 = 100hz, 12 = 103.5hz, etc all the way to tone 35 = 233.6hz.   These radios have two additional tones: 36 = 241.8hz ("M6") and 37 = 250.3hz ("M7").   Later radios added 97.4hz back into the tone list (this included the later production series 02 and 04 radios - they did 38 tones instead of 37).

241.8³: Many earlier Icoms do not have 241.8 hz, 250.3 hz or 254.1 hz.

0Z⁴: That's a zero, then the letter "Z".