Authorized amateur bands for a US station in ITU Region 2. These are the FCC edges. What mode lives where inside a band is mostly the ARRL / local band plan, not federal law. License class still controls who may transmit where. This is a wall chart, not a license.

LF / MF
2200 m: 135.7-137.8 kHz
630 m: 472-479 kHz
160 m: 1.800-2.000 MHz

HF
80 / 75 m: 3.500-4.000 MHz
60 m: 5.3515-5.3665 MHz (plus older channel centers still in the rules: 5332, 5348, 5373, 5405 kHz). Secondary. Tight power and bandwidth limits.
40 m: 7.000-7.300 MHz
30 m: 10.100-10.150 MHz (no phone)
20 m: 14.000-14.350 MHz
17 m: 18.068-18.168 MHz
15 m: 21.000-21.450 MHz
12 m: 24.890-24.990 MHz
10 m: 28.000-29.700 MHz

VHF
6 m: 50.000-54.000 MHz
2 m: 144.000-148.000 MHz
1.25 m: 219.000-220.000 MHz and 222.000-225.000 MHz

UHF
70 cm: 420.000-450.000 MHz
33 cm: 902.000-928.000 MHz
23 cm: 1240.000-1300.000 MHz

Microwave (common ham slices)
13 cm: 2300-2310 MHz and 2390-2450 MHz
9 cm: 3.3-3.5 GHz
5 cm: 5.650-5.925 GHz
3 cm: 10.0-10.5 GHz
1.25 cm: 24.00-24.25 GHz

Higher millimeter-wave amateur allocations exist above that. Most bunker work stops at 70 cm or 23 cm.

Quick license picture
Technician: all VHF/UHF, limited HF (CW slices on 80/40/15, a little 10 m phone).
General: most of HF.
Extra: the leftover HF slivers at the bottom of several bands.
Novice/Advanced are legacy. Part 97 is the law. A band chart on a website is not.

Common calling / simplex notes (convention, not FCC law)
6 m FM simplex: 52.525
2 m FM simplex: 146.520
2 m SSB calling: 144.200
70 cm FM calling: 446.000

Compiled from public FCC Part 97 allocations for Region 2. Recheck the rules before you transmit. Band edges can change.