Registry / United States / Postal code prefixes / 01 /

United States postal codes starting with 01

Prefix 01 contains 370 ZIP code records across 285 mapped localities in United States.

Verified data profile for United States prefix 01

Based on 370 records, 370 ZIP code values and 285 mapped localities. Coordinate coverage is 100.0%.

370

Records

370

Postal identifiers

100.0%

Geocoded

01001

Example code

Postal code	Locality	Administrative path	Coordinates
01001	Agawam	Massachusetts / Hampden	42.0702, -72.6227
01002	Amherst	Massachusetts / Hampshire	42.3671, -72.4646
01003	Amherst	Massachusetts / Hampshire	42.3919, -72.5248
01004	Amherst	Massachusetts / Hampshire	42.3845, -72.5132
01005	Barre	Massachusetts / Worcester	42.4097, -72.1084
01007	Belchertown	Massachusetts / Hampshire	42.2751, -72.411

Prefix coverage and examples

Use this page to understand country coverage, postal code formats, prefixes and the most useful child pages for lookup or download. The canonical route for this record set is /postal-codes/united-states/codes/01.

How to use this lookup

Use the sample rows to verify what the prefix actually covers.
Compare neighboring prefixes when a city or district spans multiple ranges.
Download the country dataset when you need every code in the prefix.

Records

370

Database rows represented by this canonical route.

Postal identifiers

370

Distinct postal code values in this route.

Localities

285

Mapped place names or administrative entries.

Coordinate coverage

100.0%

Rows with latitude and longitude available.

Detected format

5 digits or ZIP+4

US ZIP Codes use five digits, with an optional ZIP+4 extension.

Example

01001

Sample code from Agawam.

Prefix use

range lookup

Use this range when you know the first digits or letters but need matching localities.

Code	Place	Hierarchy	Coordinates
01001	Agawam	Massachusetts / Hampden	42.0702, -72.6227
01002	Amherst	Massachusetts / Hampshire	42.3671, -72.4646
01003	Amherst	Massachusetts / Hampshire	42.3919, -72.5248
01004	Amherst	Massachusetts / Hampshire	42.3845, -72.5132
01005	Barre	Massachusetts / Worcester	42.4097, -72.1084

Download postal data

CSV, JSON and XLSX exports for research, validation and data products.

Use the API

Query postal codes by country, place name, region or code prefix.

Implementation notes

Field definitions, canonical paths and practical lookup guidance.

Useful related pages

United States

Country · 41,489 records

All prefixes

Postal code prefixes · 41,487 records

Prefix 21

Postal code range · 380 records

Prefix 73

Postal code range · 378 records

Prefix 40

Postal code range · 375 records

Prefix 07

Postal code range · 372 records

Prefix 31

Postal code range · 367 records

Prefix 94

Postal code range · 366 records

Prefix 39

Postal code range · 361 records

Prefix 64

Postal code range · 358 records

Data questions

What does this ZIP code prefix cover?

This page lists representative records, localities and nearby ranges for the United States prefix 01 prefix in United States.

Is the complete prefix dataset shown here?

The HTML page shows a bounded sample from 370 matching identifiers and points to the country export for complete coverage.

How should I use a prefix page?

Use it to narrow a lookup when you know the first characters of the code, then confirm locality, region and coordinates.

Related prefix ranges in United States

Compare this range with other active ZIP code prefixes from the same country-level directory.

380 codes across 295 localities.

378 codes across 273 localities.

375 codes across 246 localities.

372 codes across 293 localities.

367 codes across 257 localities.

366 codes across 126 localities.

361 codes across 277 localities.

358 codes across 261 localities.

Representative postal code examples

This page keeps a bounded sample for fast crawling and links each code to its canonical lookup page. Use the country export when you need the full prefix dataset.

Postal code	Locality	Region	Coordinates
01001	Agawam	Massachusetts / Hampden	42.0702, -72.6227
01002	Amherst	Massachusetts / Hampshire	42.3671, -72.4646
01003	Amherst	Massachusetts / Hampshire	42.3919, -72.5248
01004	Amherst	Massachusetts / Hampshire	42.3845, -72.5132
01005	Barre	Massachusetts / Worcester	42.4097, -72.1084
01007	Belchertown	Massachusetts / Hampshire	42.2751, -72.411
01008	Blandford	Massachusetts / Hampden	42.1829, -72.9361
01009	Bondsville	Massachusetts / Hampden	42.2061, -72.3405
01010	Brimfield	Massachusetts / Hampden	42.1165, -72.1885
01011	Chester	Massachusetts / Hampden	42.2794, -72.9888
01012	Chesterfield	Massachusetts / Hampshire	42.3923, -72.8256
01013	Chicopee	Massachusetts / Hampden	42.1487, -72.6079
01014	Chicopee	Massachusetts / Hampden	42.1707, -72.6048
01020	Chicopee	Massachusetts / Hampden	42.1764, -72.5761
01021	Chicopee	Massachusetts / Hampden	42.1707, -72.6048
01022	Chicopee	Massachusetts / Hampden	42.1934, -72.5544
01026	Cummington	Massachusetts / Hampshire	42.4633, -72.9202
01027	Easthampton	Massachusetts / Hampshire	42.2668, -72.669
01028	East Longmeadow	Massachusetts / Hampden	42.0672, -72.5056
01029	East Otis	Massachusetts / Berkshire	42.1909, -73.0517
01030	Feeding Hills	Massachusetts / Hampden	42.0718, -72.6751
01031	Gilbertville	Massachusetts / Worcester	42.3322, -72.1986
01032	Goshen	Massachusetts / Hampshire	42.4404, -72.7995
01033	Granby	Massachusetts / Hampshire	42.2557, -72.52
01034	Granville	Massachusetts / Hampden	42.1127, -72.952
01035	Hadley	Massachusetts / Hampshire	42.3606, -72.5715
01036	Hampden	Massachusetts / Hampden	42.0648, -72.4318
01037	Hardwick	Massachusetts / Worcester	42.3479, -72.2253
01038	Hatfield	Massachusetts / Hampshire	42.3844, -72.6167
01039	Haydenville	Massachusetts / Hampshire	42.3818, -72.7032
01040	Holyoke	Massachusetts / Hampden	42.202, -72.6262
01041	Holyoke	Massachusetts / Hampden	42.2043, -72.6162
01050	Huntington	Massachusetts / Hampshire	42.2653, -72.8733
01053	Leeds	Massachusetts / Hampshire	42.3543, -72.7034
01054	Leverett	Massachusetts / Franklin	42.4682, -72.4993
01056	Ludlow	Massachusetts / Hampden	42.1728, -72.471
01057	Monson	Massachusetts / Hampden	42.101, -72.3196
01059	North Amherst	Massachusetts / Hampshire	42.4104, -72.5309
01060	Northampton	Massachusetts / Hampshire	42.3223, -72.6313
01061	Northampton	Massachusetts / Hampshire	42.3696, -72.636
01062	Florence	Massachusetts / Hampshire	42.3219, -72.6928
01063	Northampton	Massachusetts / Hampshire	42.3179, -72.6402
01066	North Hatfield	Massachusetts / Hampshire	42.4112, -72.6223
01068	Oakham	Massachusetts / Worcester	42.348, -72.0513
01069	Palmer	Massachusetts / Hampden	42.1762, -72.3288
01070	Plainfield	Massachusetts / Hampshire	42.5144, -72.9183
01071	Russell	Massachusetts / Hampden	42.1471, -72.8403
01072	Shutesbury	Massachusetts / Franklin	42.482, -72.4213
01073	Southampton	Massachusetts / Hampshire	42.2247, -72.7194
01074	South Barre	Massachusetts / Worcester	42.3854, -72.0954
01075	South Hadley	Massachusetts / Hampshire	42.2375, -72.5811
01077	Southwick	Massachusetts / Hampden	42.0511, -72.7706
01079	Thorndike	Massachusetts / Hampden	42.1929, -72.3296
01080	Three Rivers	Massachusetts / Hampden	42.1819, -72.3624
01081	Wales	Massachusetts / Hampden	42.0627, -72.2046
01082	Ware	Massachusetts / Hampshire	42.2618, -72.2583
01083	Warren	Massachusetts / Worcester	42.204, -72.1994
01084	West Chesterfield	Massachusetts / Hampshire	42.3903, -72.8709
01085	Westfield	Massachusetts / Hampden	42.1251, -72.7495
01086	Westfield	Massachusetts / Hampden	42.1734, -72.848

Showing 60 representative records from 370 matching codes to keep the page fast and crawlable. Download the United States dataset for complete coverage.