In the US frequency allocation within each band (including repeaters) is left up to regional spectrum management organizations (which have no legal authority).

In the US frequency allocation within each band (including repeaters) is left up to regional spectrum management organizations (which have no legal authority). So it varies by region. Here is the allocation for eastern New England for example: https://nesmc.org/docs/nesmc_bandplans_2023.pdf https://nesmc.org/docs/nesmc_bandplans_2023.pdf On the crowded 2m band we have 20 kHz for major repeaters and 9 kHz for smaller ones.