Postal Code Tools

ZIP Code Lookup

Look up any ZIP code or postal code to find city, state, county, demographics, and geographic coordinates.

Reverse ZIP Lookup

Find the ZIP code for any city, address, or location. Enter a place name to get all matching postal codes.

ZIP+4 Finder

Find the full 9-digit ZIP+4 code for a specific street address. ZIP+4 codes narrow delivery to a specific block or building.

ZIP Code Distance Calculator

Calculate the distance between two US ZIP codes. Get miles, kilometers, and estimated driving time using the Haversine formula. Instant results with city and state names.

ZIP Distance Calculator (API)

Calculate the distance between two ZIP codes. Get straight-line and driving distance estimates via server-side API.

Radius Search

Find all ZIP codes within a given radius of a location. Useful for delivery zones, service areas, and local marketing.

Driving Time Estimator

Estimate driving time between two ZIP codes based on distance and average road speeds.

Population Lookup

Look up population data for any ZIP code, city, or county. Census-derived population estimates.

Income Comparison

Compare median household income between ZIP codes. See how neighborhoods stack up economically.

Cost of Living Comparison

Compare cost of living between ZIP codes using housing, income, and demographic data.

Address Validator

Validate and standardize US addresses. Check if an address is deliverable and get the correct ZIP+4 code.

ZIP Code Validator

Check if a ZIP code is valid and currently in use. Supports US ZIP codes and international postal codes.

Bulk ZIP Verifier

Verify a list of ZIP codes at once. Upload or paste up to 1,000 codes for batch validation.

ZIP Boundary Viewer

View ZIP code boundaries on an interactive map. See the geographic area covered by any US ZIP code.

State ZIP Range Chart

See the ZIP code ranges assigned to each US state. Visual chart of how ZIP codes are distributed geographically.

Time Zone Finder

Find the time zone for any ZIP code. Get UTC offset, daylight saving time info, and current local time.

Shipping Zone Calculator

Calculate USPS, UPS, and FedEx shipping zones between two ZIP codes. Estimate delivery times and costs.

Sales Tax by ZIP

Look up combined sales tax rates by ZIP code. Includes state, county, city, and special district taxes.

ZIP to Congressional District

Find the congressional district for any ZIP code. See your representative and district boundaries.