| Locality | Post Code |
|---|---|
| Addison, DuPage | 60101 |
| Aurora, DuPage | 60502, 60504, 60598 |
| Bartlett, DuPage | 60103 |
| Bensenville, DuPage | 60106 |
| Bloomingdale, DuPage | 60108 |
| Burr Ridge, DuPage | 60527 |
| Burridge, DuPage | 60527 |
| Carol Stream, DuPage | 60122, 60128, 60188, 60199 |
| Clarendon Hills, DuPage | 60514 |
| Cloverdale, DuPage | 60103 |
| Darien, DuPage | 60561 |
| Downers Grove, DuPage | 60515, 60516 |
| Elmhurst, DuPage | 60126 |
| Eola, DuPage | 60519 |
| Flowerfield, DuPage | 60148 |
| Fox Valley, DuPage | 60599 |
| Fox Valley Facility, DuPage | 60599 |
| Glen Ellyn, DuPage | 60137, 60138 |
| Glendale Heights, DuPage | 60139 |
| Hinsdale, DuPage | 60521, 60522 |
| Itasca, DuPage | 60143 |
| Keeneyville, DuPage | 60172 |
| Lisle, DuPage | 60532 |
| Lombard, DuPage | 60148 |
| Medinah, DuPage | 60157 |
| Naperville, DuPage | 60540, 60563, 60565, 60567 |