If there is one address for your park then any realtor can get that for you quickly. Try asking the property management on site. Last resort go to county records, they will tell you for sure.
Prudential CA Realty
Is it in a manufactured home rental park in California? Or is it on private land in California. I see you're in Phoenix but the inquiry is in Capo. If it's a rental park in California you can find out who the park owner is by contacting the Housing and Community Development Department (HCD). Call the Riverside office or visit the following link: http://www.hcd.ca.gov/codes/mhp/12-19-07MHconstrction.pdf.
If it's on private land you could do a title search which most title companies can provide. Hope this helps. If it is in a park let us know. There's a lot of things you need to know before you enter into a contract to purchase a manufactured home. You can also check our our website for other information re: MH's Good luck.