How Can I Verify Employment with Cobblestone Auto Spa? January 28, 2025 23:05 Updated For Employment Verifications, please contact The Worknumber at 800-367-5690 - Our Company Code is 10438029. Related to Employment Verification Related articles Where Can I Find Career Opportunities with Cobblestone Auto Spa? What’s included in Cobblestone’s 18-point preventative maintenance check?