ZIP codes in Belknap County
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- 03218 Center BarnsteadBelknap County
- 03220 BelmontBelknap County
- 03225 Center BarnsteadBelknap County
- 03226 Center HarborBelknap County
- 03237 BelmontBelknap County
- 03246 LaconiaBelknap County
- 03249 LaconiaBelknap County
- 03253 MeredithBelknap County
- 03256 New HamptonBelknap County
- 03269 SanborntonBelknap County
- 03809 AltonBelknap County
- 03810 AltonBelknap County
- 03837 AltonBelknap County