Cal. Civ. Proc. Code § 689.020

(a) Except as otherwise provided by statute, whenever a warrant may properly be issued by a local child support agency pursuant to Section 17522 of the Family Code, and the warrant may be levied with the same effect as a levy pursuant to a writ of execution, the local child support agency may use any of the remedies available to a judgment creditor, including, but not limited to, those provided in Chapter 6 (commencing with Section 708.010) of Division 2.

(b) The proper court for the enforcement of the remedies provided under this chapter is the superior court in the county where the local child support agency enforcing the support obligation is located.