The HF RTTY sub-band boundaries are defined and limited by your license. Below are approximations of “normal” operating RTTY sub-bands world-wide. When operating RTTY, be sure respect the band guards around the IBP/NCDXA beacon frequencies noted below. For a detailed frequency band for IARU Region 2, see https://www.iaru-r2.org/wp-content/uploads/2020/02/IARU-R2-Plan-de-Bandas.pdf. For USA licensed frequencies, see http://www.arrl.org/FandES/field/regulations/allocate.html and for USA band plan, see http://www.arrl.org/FandES/field/regulations/bandplan.html.
10 meters – 28080.5 to 28100 kHz, during contests 28080.5-28200 kHz (JA 28070-28200 kHz). (Note: PSK operation around 28120 KHz). Avoid 28199.5-28200.5 KHz (NCDXF/IARU frequency 28200 kHz).
12 meters – 24910 to 24930 kHz with most activity around 24920 kHz (JA 24910-24940 kHz). Avoid 24929.5-24930.5 kHz (NCDXF/IARU frequency 24930 kHz).
15 meters – 21080.5 to 21100 kHz, during contests 21080.5-21150 kHz (JA 21070-21150 kHz) (note: PSK31 operations around 21070-21072 kHz). Avoid 21149.5-21150.5 kHz (NCDXF/IARU frequency 21150 kHz).
17 meters – 18100 to 18110 kHz with occasionally operations below 18100 but above 18090 KHz (JA 18090-18120 kHz). Note: It is illegal for USA stations to operate RTTY above 18110 KHz. Avoid 18109.5-18110.5 KHz (NCDXF/IARU frequency 18110 KHz).
20 meters – 14080.5 to 14100 kHz, during contests 14080.5-14150 kHz (JA 14070-14150 kHz). (Note PSK31 around 14070-14072 kHz). Avoid 14099.5-14100.5 kHz (NCDXF/IARU frequency 14100 kHz).
30 meters – 10120 to 10150 kHz, with most operation around 10140 kHz (JA 10130-10150 kHz).
40 meters – 7025 to 7050 kHz and 7080 to 7100 kHz, during contests 7025-7100 kHz (JA 7030-7100 kHz). (USA stations are also allowed RTTY between 7100-7125 kHz).
80 meters – 3580 to 3600 kHz (JA 3520-3575 kHz), during contests 3570 (or lower)-3600 kHz. (RTTY operation above 3600 KHz is not permitted in the USA).
160 meters – 1800 to 1810 kHz. (JA 1907.5-1912.5 kHz) 1800 to 1810 kHz. (JA 1907.5-1912.5 kHz) Europe cannot operate below 1810 kHz. Region 1 (Europe, Africa, Middle East & Northern Asia) band plan suggests 1838-1843 kHz.