Hello Dogboy, To help you with some specificity.... If you need to get an address acknowledgement for the neighborhood school, Pioneer in this case, call the number below and they will verify each and every address you provide. This is the quickest and most fectual way to get a definitive answer for your question.
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!