Spectral indices below and above the spectral break for 32 pulsars with relatively well-measured spectra (see text for details). Pulsars with a single spectral break are marked with circles. For pulsars with two spectral breaks, the lower-frequency one is marked with the downward triangles and the higher-frequency one with the upward triangles. The colour indicates the frequency of the break and the dotted line corresponds to no change in the spectral index. The question mark indicates PSR B2303+30, for which the value of the high-frequency spectral index was greatly influenced by a single flux density measurement. Note that for ν_br ≳ 500 MHz the change in spectral index is relatively moderate, whereas for ν_br ≲ 300 MHz the spectral index below the break takes (sometimes large) positive values. This corresponds to the previously known “high-frequency cut-off” and “low-frequency turnover” in pulsar spectra.