First three digits · Missouri
ZIP Codes Starting with
47 ZIP codes start with 638, sorted at the St Louis, MO (SCF 630) sectional center (USPS labeling list L005, effective October 1, 2026) in Missouri: 45 residential ZIP codes across 6 counties and 2 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 638 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 638, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 638 to the St Louis, MO (SCF 630) facility. The last two digits pick the delivery area. By residents, the largest town names among the 638 ZIP codes are Sikeston, Dexter, Kennett, Caruthersville, Malden and East Prairie.
The same facility sorts 12 prefixes, 714 ZIP codes in all: 620, 622, 628, 629, 630, 631, 633, 634, 636, 637, 638, 639.
Where are the 638 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 638
| County | ||||||
|---|---|---|---|---|---|---|
| 63801 | Sikeston | Scott County | 22,027 | 104 | $63k | $157k |
| 63820 | Anniston | Mississippi County | 249 | 511 | – | – |
| 63821 | Arbyrd | Dunklin County | 616 | 15 | $40k | $61k |
| 63822 | Bernie | Stoddard County | 2,724 | 35 | $58k | $128k |
| 63823 | Bertrand | Mississippi County | 1,434 | 36 | $63k | $106k |
| 63824 | Blodgett | Scott County | 185 | 1,555 | $38k | – |
| 63825 | Bloomfield | Stoddard County | 4,224 | 40 | $52k | $97k |
| 63826 | Braggadocio | Pemiscot County | 164 | 29 | – | $68k |
| 63827 | Bragg City | Pemiscot County | 431 | 6 | $65k | $87k |
| 63828 | Canalou | New Madrid County | 177 | 181 | $47k | $32k |
| 63829 | Cardwell | Dunklin County | 1,070 | 46 | $28k | $68k |
| 63830 | Caruthersville | Pemiscot County | 6,118 | 98 | $37k | $121k |
| 63833 | Catron | New Madrid County | 137 | 2 | $61k | $193k |
| 63834 | Charleston | Mississippi County | 5,169 | 21 | $41k | $114k |
| 63837 | Clarkton | Dunklin County | 1,381 | 44 | $46k | $54k |
| 63839 | Cooter | Pemiscot County | 290 | 340 | $42k | $74k |
| 63840 | Deering | Pemiscot County | 74 | 251 | $65k | $62k |
| 63841 | Dexter | Stoddard County | 13,191 | 102 | $59k | $163k |
| 63845 | East Prairie | Mississippi County | 5,261 | 28 | $51k | $110k |
| 63846 | Essex | Stoddard County | 1,239 | 12 | $51k | $93k |
| 63847 | Gibson | Dunklin County | 91 | 42 | – | – |
| 63848 | Gideon | New Madrid County | 887 | 11 | $43k | $64k |
| 63849 | Gobler | Dunklin County | 176 | 8 | $91k | $117k |
| 63850 | Grayridge | Stoddard County | 8 | 667 | – | – |
| 63851 | Hayti | Pemiscot County | 3,684 | 37 | $29k | $78k |
| 63852 | Holcomb | Dunklin County | 1,172 | 24 | $47k | $93k |
| 63853 | Holland | Pemiscot County | 141 | 470 | $37k | $59k |
| 63855 | Hornersville | Dunklin County | 854 | 12 | $50k | $75k |
| 63857 | Kennett | Dunklin County | 11,930 | 112 | $55k | $115k |
| 63860 | Kewanee | New Madrid County | 172 | 41 | $41k | $56k |
| 63862 | Lilbourn | New Madrid County | 1,237 | 19 | $44k | $82k |
| 63863 | Malden | Dunklin County | 5,321 | 94 | $47k | $92k |
| 63866 | Marston | New Madrid County | 409 | 106 | $34k | $64k |
| 63867 | Matthews | New Madrid County | 764 | 9 | $47k | $111k |
| 63868 | Morehouse | New Madrid County | 653 | 661 | $32k | $57k |
| 63869 | New Madrid | New Madrid County | 3,218 | 31 | $58k | $132k |
| 63870 | Parma | New Madrid County | 1,066 | 13 | $58k | $62k |
| 63873 | Portageville | New Madrid County | 4,015 | 21 | $54k | $128k |
| 63874 | Risco | New Madrid County | 288 | 298 | $48k | $62k |
| 63875 | Rives | Dunklin County | PO Box or unique | – | – | – |
| 63876 | Senath | Dunklin County | 2,071 | 35 | $35k | $96k |
| 63877 | Steele | Pemiscot County | 2,816 | 19 | $52k | $160k |
| 63878 | Tallapoosa | New Madrid County | 92 | 172 | – | $61k |
| 63879 | Wardell | Pemiscot County | 694 | 31 | $41k | $57k |
| 63880 | Whiteoak | Dunklin County | 97 | 1,366 | – | – |
| 63881 | Wolf Island | Mississippi County | PO Box or unique | – | – | – |
| 63882 | Wyatt | Mississippi County | 322 | 474 | $30k | $57k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.