3-Digit ZIP Code Map (ZIP3)
Download High-Resolution ZIP3 Map — national overview of all 3-digit ZIP areas.
Open the MapBusinessOnline Viewer (free download required on first use) to explore interactive ZIP3 map.
What is a ZIP3 (3-digit ZIP Code)?
A ZIP3 is the first three digits of a standard 5-digit ZIP Code. USPS uses these prefixes to organize mail by Sectional Center Facility (SCF) areas, grouping nearby ZIPs into broader regions.
ZIP3s are often used for:
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High-level territory planning
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Market analysis and rollups
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Demographic summaries at a regional level
Practical Accuracy Tips for ZIP3
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Not the same as ZIP5: ZIP3s group many 5-digit ZIP Codes together. If you’re working with exact street addresses, you’ll want ZIP5 since every address belongs to a specific 5-digit ZIP Code.
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Crossing state lines: Don’t assume ZIP3s stop at state borders — some prefixes cross state or county boundaries.
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Best for rollups: ZIP3s are ideal for regional analysis, high-level market summaries, or franchise/territory planning where detail at the ZIP5 level isn’t necessary.
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Data available: MapBusinessOnline provides Census demographics at both ZIP3 and ZIP5 levels, so you can compare rollups or zoom into detailed analysis as needed.
Frequently Asked Questions
What is a ZIP3, and how is it assigned?
It’s the prefix formed by the first three digits of a 5-digit ZIP Code. USPS assigns them to group ZIPs by service facility.
Can I see ZIP3 boundaries on your map?
Yes. The free Viewer shows ZIP3 boundaries. For advanced features like color-coding, ZIP3-based territories, or combining ZIP3 with your data, use the full MapBusinessOnline application.
Do ZIP3 areas cross state lines?
Yes. Because USPS assigns them for routing, some ZIP3s overlap counties or states.
Create Your Own ZIP3 Maps
With the full MapBusinessOnline application, you can go beyond simple map viewing to:
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Build territories at the ZIP3 level for sales, delivery, or service coverage.
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Color ZIP3s by demographics such as population or household income.
- Overlay your customer or prospect data to identify market potential.
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Analyze logistics operations by ZIP3 — plan drive-time areas around warehouses, model delivery ranges, and optimize routing.
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Export ZIP3 lists with Census data for reporting and data integration.
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Share interactive ZIP3 maps with colleagues and clients.
