Alon Adams, 25, of the 500 block of Collins Avenue, was arrested on Thursday morning.
The Camden County Prosecutor's Office says Adams called their office and the police 911 system with those fake calls between 7:48 a.m. and 9:29 a.m.
The calls were made from Adams' personal phone, investigators say, which was identified by caller ID.
During the incidents, Camden City Hall and the Prosecutor's Office were evacuated for a brief period.
No devices were found.