1290 Blossom Hill Rd
San Jose, CA 95118
The link CJ provided is best used when looking for quick scoring results fro schools. I use it often.
Here is another source link specific to Pioneer High.
To help get a range of areas for homes that may be in Pioneer's neighborhood you can use 95118 and 95124 as search values. My son is at Leigh High School which draws mostly from 95124.
Good Luck I hope I have been of some help!
There is no way of guaranteeing school assignment by address. It is best to confirm with the school board.
There is a good web site that helps show school location/neighborhood but please check in with school district before making an offer. Good luck and welcome to San Jose!