Cx4 may refer to:
- The Beretta Cx4 Storm, a pistol-caliber carbine
- The Cx4 chip, a math coprocessor by Capcom
- The Mazda CX-4, compact crossover vehicle
- 10GBASE-CX4, a copper based 10 Gigabit Ethernet PHY
- CX 4 Radio Rural, a radio station in Uruguay
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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