| Frequency | Allocation |
| 430.0125 - 430.075 | 6 * 12.5 KHz channels - voice internet linking |
| 430.0875 | 12.5 KHz channel |
| 430.100 - 430.400 | 12 * 25 KHz channels |
| 430.425 | 50 KHz regenerative nodes - RX |
| 430.475 | 50 KHz regenerative nodes - TX |
| 430.5125 | 25 KHz regenerative nodes - RX |
| 430.5375 | 25 KHz regenerative nodes - TX |
| 430.5625 - 430.5875 | 3 * 12.5 KHz channels |
| 430.600 - 430.675 | 4 * 25 KHz channels - BBS/node linking |
| 430.700 - 430.775 | 4 * 25 KHz channels - high speed linking |
| 430.825 | Emergency communications priority |
| 430.850 - 430.975 | 6 * 25 KHz channels |
| 431.000 - 431.990 | Not available within a 100 km radius of Charing Cross, London. Consult with DCC before considering use |
| 431.075 | Voice internet linking |
| 431.125 - 431.225 | 4 * 25 KHz channels - Voice internet linking |
| 432.0850 +/- 5 kHz | PSK31/MT63 (etc) Centre of Activity |
| 432.625 | High speed AX25 & TCP/IP user access only |
| 432.650 | AX25 user access only |
| 432.675 | AX25 user access only |
| 433.625 | TCP/IP user access only |
| 433.650 | AX25 user access only |
| 433.675 | DX cluster user access only |
| 433.700 | Emergency communications priority, 12.5 kHz |
| 433.800 | Recommended for unconnected net traffic |
| 433.825 | TCP/IP user access, 4800 bps or faster |
| 433.850 | AX.25 user access, 4800 bps or faster |
| 433.875 | DX cluster user access, 4800 bps or faster |
| 433.900 | DX cluster user access, 1200 bps |
| 433.925 | 1200 bps traffic, subject to local coordination |
| 433.950 | Experimental digital modes |
| 433.975 | Experimental digital modes |
| 434.000 - 434.250 | Linking only, subject to local coordination. 4800 bps or faster. Vertical polarisation to minimize impact to ATV users. Two frequency (full- or half-duplex) with 430 / 431 MHz to be encouraged. |
| 439.625 | 50 KHz regenerative nodes - TX |
| 439.675 | 50 KHz regenerative nodes - RX |
| 439.7125 | 25 KHz regenerative nodes - TX |
| 439.7375 | 25 KHz regenerative nodes - RX |
| 439.7625 | BBS/Node linking |
| 439.775 | Not available |
| 439.7875 | BBS/Node linking |
| 439.800 | BBS/Node linking |
| 439.825 - 439.875 | 3 * 25 KHz channels, RX-only |
| 439.900 - 439.975 | 4 * 25 KHz channels - high speed linking |
Note: IARU Region 1 policy is that no allocations
in excess of 25 kHz bandwidth are to be made between 430 and 440
MHz. Systems currently licensed for 50KHz channels may continue
to operate, but no new 50 KHz allocations will be granted.
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