Self-hosted data for International
Address Verification

An address validation database is a centralized dataset that verifies and standardizes addresses by matching them with trusted postal sources like the United States Postal Service (USPS). It ensures that each input address is accurate, properly formatted, and ready for use in logistics, analytics, or CRM systems — helping businesses reduce errors and improve overall address data quality.

At GeoPostcodes, our address validation database covers 247 countries and sources data from more than 1,500 authoritative providers, including USPS. We also supply high-quality reference data that helps organizations verify addresses globally using trusted postal and administrative information.

A global address validation database provides consistent, automated verification for both U.S. and international addresses. It works by cross-referencing stored postal data against curated global reference datasets to verify addresses accurately and at scale. GeoPostcodes delivers a self-hosted address validation database that ensures complete data ownership, fast processing, and no reliance on third-party validation services — ideal for enterprises that require reliable, privacy-first address management.

An address validation database operates locally or on-premise, while a validation API performs real-time verification through online requests. The database model is ideal for companies that need secure, large-scale processing or offline validation, whereas APIs are designed for immediate, transactional checks. GeoPostcodes enables both methods by offering enterprise-grade reference data that integrates into address verification software or validation APIs to verify addresses efficiently across any system.

The cost of an address validation database depends on factors such as country coverage, update frequency, and the scale of your verification needs. GeoPostcodes offers flexible licensing options for regional and global datasets. Whether your organization manages U.S. postal addresses or operates internationally, pricing is customized to fit your address data volume, technical setup, and desired integration level.

The GeoPostcodes address validation database includes comprehensive components for enterprise-level data quality, such as:

• Verified postal codes and street names across 247 countries
• City, region, and hierarchical administrative mappings
• Coordinates for geocoding and distance calculations
• Consistent naming conventions for integration across address verification tools
• Regular quarterly updates for accuracy and reliability

This ensures every postal address is clean, standardized, and ready for operational use in address verification software.

The GeoPostcodes address validation database is updated quarterly to ensure the highest data accuracy. Each update incorporates new postal codes, replaces outdated records, and refines data structures for improved consistency. These regular updates keep enterprise address data aligned with the United States Postal Service and other global postal authorities, ensuring businesses always verify addresses against the most current information.

Integrating the GeoPostcodes address validation database is straightforward and compatible with most enterprise systems. You can connect it to your CRM, ERP, or data warehouse to verify addresses automatically and locally, without relying on an external validation API. Available in SQL, CSV, and API-ready formats, GeoPostcodes’ reference data allows flexible integration with existing address verification software or custom address verification tools.

A professional address validation database provides superior accuracy, consistency, and compliance compared to open-source datasets. GeoPostcodes’ reference data helps enterprises verify addresses confidently, removing manual corrections and reducing dependency on unverified sources. This improves operational efficiency and ensures your address validation workflows align with postal standards and enterprise data governance requirements.

An address validation service checks each input address against its database through a structured process:

• Parsing – The system separates the input address into individual components (street, number, city, ZIP code).
• Standardization – Components are corrected and formatted to match local postal rules, such as those defined by the USPS.
• Verification – The standardized address is checked against the authoritative database to confirm it exists and can receive mail.
• Enrichment – Additional details, such as geocodes or property data, can be appended for analytics or logistics use.

GeoPostcodes’ datasets ensure each step produces verified, standardized postal addresses ready for enterprise use.

Commercial Databases: Commercial address validation databases, such as GeoPostcodes, unify and enrich postal and administrative data worldwide, ensuring standardized, high-quality address information for enterprise applications.

Official Postal Authority Databases: Many countries maintain their own datasets. For example:

United States Postal Service (USPS): USPS manages the official database for validating U.S. addresses. Access to its full dataset is provided through the Coding Accuracy Support System (CASS) certification program.

National Address Database (NAD): Managed by the U.S. Department of Transportation, the NAD aggregates address data from local and state agencies for emergency and infrastructure purposes.