{"ein":"231915567","kind":"nonprofit","verification":"irs-listed","name":"KEYSTONE SERVICE SYSTEMS INC","ntee":"P730","city":"HARRISBURG","state":"PA","revenue":201690817,"assets":110969035,"sourceName":"IRS Exempt Organizations Business Master File extract","sourceUrl":"https://www.irs.gov/charities-non-profits/exempt-organizations-business-master-file-extract-eo-bmf","lastChecked":"2026-07-05"}