Washington
| Company | Category | Area | Address | Web | Contact person | |
| CERTIFIEDWEBSITE | Technology Related | Washington | PO BOX 5665, VANCOUVER, Clark, Washington, 98668-5665, USA | - | - | Mike Smith |
| CERTUS CORP | Unclassified | Washington | 6100 219TH ST SW STE 360, MOUNTLAKE TER, Snohomish, Washington, 98043-2222, USA | - | - | - |
| CERTWORLD INC | Custom Computer Programing | Washington | 11250 KIRKLAND WAY, KIRKLAND, King, Washington, 98033-3421, USA | - | - | Kevin Rabourn |