First three digits · Kentucky
ZIP Codes Starting with
17 ZIP codes start with 425, sorted at the Knoxville, TN (SCF 377) sectional center (USPS labeling list L005, effective October 1, 2026) in Kentucky: 14 residential ZIP codes across 3 counties and 3 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 425 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 425, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 425 to the Knoxville, TN (SCF 377) facility. The last two digits pick the delivery area. By residents, the largest town names among the 425 ZIP codes are Somerset, Liberty, Science Hill, Nancy, Eubank and Bronston.
The same facility sorts 10 prefixes, 340 ZIP codes in all: 377, 378, 379, 407, 408, 409, 417, 418, 425, 426.
Where are the 425 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 425
| County | ||||||
|---|---|---|---|---|---|---|
| 42501 | Somerset | Pulaski County | 18,214 | 91 | $49k | $142k |
| 42502 | Somerset | Pulaski County | PO Box or unique | – | – | – |
| 42503 | Somerset | Pulaski County | 25,321 | 196 | $55k | $210k |
| 42516 | Bethelridge | Casey County | 540 | 43 | $43k | $172k |
| 42518 | Bronston | Wayne County | 3,031 | 89 | $54k | $156k |
| 42519 | Burnside | Pulaski County | 2,756 | 56 | $42k | $136k |
| 42528 | Dunnville | Casey County | 2,126 | 40 | $50k | $159k |
| 42533 | Ferguson | Pulaski County | 897 | 553 | $41k | $153k |
| 42539 | Liberty | Casey County | 9,249 | 42 | $41k | $131k |
| 42541 | Middleburg | Casey County | 498 | 34 | $43k | $128k |
| 42544 | Nancy | Pulaski County | 5,520 | 39 | $61k | $170k |
| 42553 | Science Hill | Pulaski County | 5,649 | 86 | $53k | $155k |
| 42558 | Tateville | Pulaski County | PO Box or unique | – | – | – |
| 42564 | West Somerset | Pulaski County | PO Box or unique | – | – | – |
| 42565 | Windsor | Casey County | 758 | 32 | $71k | $166k |
| 42566 | Yosemite | Casey County | 541 | 32 | $60k | $131k |
| 42567 | Eubank | Pulaski County | 5,390 | 61 | $47k | $105k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.