| A | New Castle | Active | 7449 |
| A | New Castle | Active | 7449 |
| A - 1 TELEVISION SERVICE AND SALES | New Castle | Active | 8753 |
| A - BRANDYWINE LOCK & SAFE CO | New Castle | Active | 9128 |
| A - STANDARD INDUSTRIAL SUPPLY CO | New Castle | Active | 19604 |
| A & A AMER AUTO SHIPPING | New Castle | Active | 566887 |
| A & A CASUALTY INSURANCE ADJUSTERS | New Castle | Active | 28917 |
| A & A CONCESSIONS, LLC | New Castle | Active | 39643 |
| A & A DELIGHTFUL FOODS | New Castle | Active | 38455 |
| A & A ENVIRONMENTAL SERVICES | New Castle | Active | 27439 |
| A & A I | New Castle | Active | 7528 |
| A & A JANITORIAL SERVICE | New Castle | Active | 10782 |
| A & A MECHANICAL SERVICE, INC. | New Castle | Active | 13805 |
| A & A MOVING SERVICE | New Castle | Active | 118 |
| A & A SANDWICH SH0P | New Castle | Active | 8600 |
| A & AI | New Castle | Active | 7528 |
| A & B ASSOCIATES | New Castle | Active | 12748 |
| A & B ASSOCIATES | New Castle | Active | 12748 |
| A & B CAFE | New Castle | Active | 13134 |
| A & B ENTERPRISES CO | New Castle | Active | 9929 |
| A & B GROCERY STORE | New Castle | Active | 4066 |
| A & B HEATING STOVE COMPANY | New Castle | Active | 732 |
| A & B INVESTMENTS ASSOCIATES | New Castle | Active | 1699 |
| A & B MERCHANDISE | New Castle | Active | 21659 |
| A & B PAINTERS | New Castle | Active | 530 |