First three digits · Indiana
ZIP Codes Starting with
11 ZIP codes start with 464, sorted at the Gary, IN (SCF 463) sectional center (USPS labeling list L005, effective October 1, 2026) in Indiana: 9 residential ZIP codes across 1 county and 2 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 464 mean?
The first digit, 4, is one of ten national areas (Indiana, Kentucky, Michigan and Ohio). The first three, 464, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 464 to the Gary, IN (SCF 463) facility. The last two digits pick the delivery area. By residents, the largest town names among the 464 ZIP codes are Gary, Merrillville and Lake Station.
The same facility sorts 2 prefixes, 64 ZIP codes in all: 463, 464.
Where are the 464 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 464
| County | ||||||
|---|---|---|---|---|---|---|
| 46401 | Gary | Lake County | PO Box or unique | – | – | – |
| 46402 | Gary | Lake County | 5,836 | 692 | $34k | $85k |
| 46403 | Gary | Lake County | 10,929 | 1,183 | $46k | $178k |
| 46404 | Gary | Lake County | 15,428 | 2,568 | $42k | $95k |
| 46405 | Lake Station | Lake County | 12,184 | 1,350 | $61k | $139k |
| 46406 | Gary | Lake County | 9,001 | 668 | $36k | $92k |
| 46407 | Gary | Lake County | 8,577 | 2,054 | $29k | $60k |
| 46408 | Gary | Lake County | 15,747 | 1,617 | $48k | $103k |
| 46409 | Gary | Lake County | 7,184 | 2,007 | $45k | $79k |
| 46410 | Merrillville | Lake County | 39,243 | 1,306 | $64k | $208k |
| 46411 | Merrillville | Lake County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.