Is ZIPSFIELD free?
Yes. Browsing ZIP codes, places, maps, and the distance tools is free. No visitor account is required.
Good questions. Clear answers.
A practical guide to using ZIPSFIELD responsibly.
41,704 ZIPLast source check: 2026-11-10
A practical guide to US ZIP codes ↗
Can I use this to validate a mailing address?
Use ZIPSFIELD for discovery and reference, not delivery certification. We do not promise a specific accuracy percentage or real-time USPS synchronization. Confirm important mailings with your carrier.
How do updates work?
The refresh mechanism checks weekly when the update service is running. New snapshots pass structural and coverage checks before publication. A failed check keeps the previous snapshot; the displayed check date reports the actual last successful check.
What do the maps and photos show?
Map points are approximate postal locations. State outlines provide context; they do not turn postal points into city or county boundaries. Any photo has its own credit and is illustrative of the named place, not every address in a ZIP.
Official mailing references
Use these official websites to check mailing details. They are references, not ZIPSFIELD data suppliers, partners, or endorsers. Their services and terms apply separately.
ZIP codes organize mail delivery, not administrative boundaries. A code can have several city or county associations. Coordinates are approximate; verify delivery addresses with your carrier. Credits & licenses ↗