First three digits · New Hampshire
ZIP Codes Starting with
6 ZIP codes start with 033, sorted at the Manchester, NH (SCF 030) sectional center (USPS labeling list L005, effective October 1, 2026) in New Hampshire: 4 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 033 mean?
The first digit, 0, is one of ten national areas (Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, Puerto Rico, Rhode Island, Vermont, U.S. Virgin Islands and Armed Forces Europe). The first three, 033, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 033 to the Manchester, NH (SCF 030) facility. The last two digits pick the delivery area. By residents, the largest town names among the 033 ZIP codes are Concord, Bow and Loudon.
The same facility sorts 6 prefixes, 223 ZIP codes in all: 030, 031, 032, 033, 034, 038.
Where are the 033 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 033
| County | ||||||
|---|---|---|---|---|---|---|
| 03301 | Concord | Merrimack County | 33,995 | 691 | $87k | $371k |
| 03302 | Concord | Merrimack County | PO Box or unique | – | – | – |
| 03303 | Concord | Merrimack County | 16,571 | 244 | $81k | $296k |
| 03304 | Bow | Merrimack County | 8,335 | 296 | $173k | $507k |
| 03305 | Concord | Merrimack County | PO Box or unique | – | – | – |
| 03307 | Loudon | Merrimack County | 5,724 | 122 | $107k | $365k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.