The following frequencies are generally recognized for certain modes or activities (all frequencies are in MHz). I.e. If you are not participating in the activity listed for a frequency, move a few kilohertz away.

Nothing in the rules recognizes a net's, group's or any individual's special privilege to any specific frequency. Section 97.101(b) of the Rules states that "Each station licensee and each control operator must cooperate in selecting transmitting channels and in making the most effective use of the amateur service frequencies. No frequency will be assigned for the exclusive use of any station." No one "owns" a frequency. It's good practice--and plain old common sense--for any operator, regardless of mode, to check to see if the frequency is in use prior to engaging operation. If you are there first, other operators should make an effort to protect you from interference to the extent possible, given that 100% interference-free operation is an unrealistic expectation in today's congested bands.

Frequency (MHz)
1.800-1.830 CW, data and other narrowband modes
1.810 QRP CW calling frequency
1.830-1.840 CW, data and other narrowband modes, intercontinental QSOs only
1.840-1.850 CW; SSB, SSTV and other wideband modes, intercontinental QSOs only
1.850-2.000 CW; phone, SSTV and other wideband modes
3.560 QRP CW calling frequency
3.590 RTTY DX
3.580-3.620 Data
3.620-3.635 Automatic data control station
3.710 QRP Novice/Technician CW calling freq.
3.790-3.800 DX window
3.845 SSTV
3.885 AM calling frequency
3.985 QRP SSB calling frequency
7.040 RTTY DX QRP CW calling frequency
7.080-7.100 Data
7.100-7.105 Automatic data control station
7.110 QRP Novice/Technician CW calling freq.
7.171 SSTV
7.285 QRP SSB calling frequency
7.290 AM calling frequency
10.106 QRP CW calling frequency
10.130-10.140 Data
10.140-10.150 Automatic data control station
14.060 QRP CW calling frequency
14.070-14.095 Data
14.095-14.0995 Automatic data control station
14.100 NCDXF/IARU beacons
14.1005-14.112 Automatic data control station
14.230 SSTV
14.285 QRP SSB calling frequency
14.286 AM calling frequency
18.100-18.105 Data
18.105-18.110 Automatic data control station
21.060 QRP CW calling frequency
21.070-21.100 Data
21.090-21.100 Automatic data control station
21.340 SSTV
21.385 QRP SSB calling frequency
24.920-24.925 Data
24.925-24.930 Automatic data control station
28.060 QRP CW calling frequency
28.070-28.120 Data
28.120-28.189 Automatic data control station
28.190-28.225 Beacons
28.385 QRP SSB calling frequency
28.680 SSTV
29.000-29.200 AM
29.300-29.510 Satellite downlinks
29.520-29.580 Repeater inputs
29.600 FM simplex
29.620-29.680 Repeater outputs

NCDXF/IARU beacons operate on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz.