There's an awful lot of cross streets in 89052, and from what I'm hearing, an awful lot of old zip code maps online. I recently had a call from a new client that was confused by the maps he'd seen for that area. It seems so many didn't include the "newer" boundary changes, or the 89044 that was added, so made this enlarged view.
The boundaries are pretty much St.Rose in the north, Green Valley Pkwy (Sunridge heights pkwy) in the east, Executive Airport Dr. on the west and Anthem in the south. Here's a good link to get an accurate map: http://maps.huge.info/zip.htm