BREAKING: USPS slashes address verification to 60 addresses/hour. What now?
Smarty

Address keys: 5 data management uses and how to choose one

Address Keys: 5 Data Management Uses and How to Choose One
Updated October 29, 2025
Tags
Address Keys: 5 Data Management Uses and How to Choose One

Address keys can be used to improve data blending, update and enrich addresses, reduce data processing time, and protect personally identifiable information. In this webinar, we brought in our product marketing manager John Hickey to teach about what they are, how they work, why they're crucial for data management, the different types available, what to look for in one, and what to avoid.

Ultimately, John pointed out five primary uses for address keys:
1. Update Address Changes

2. Simplify Data Blending

3. Reduce Processing Time

4. Protect Personally Identifiable information (PII)

5. Enhance Property Data

In this recap, we'll go over these, but if you'd like to watch the full webinar recording you can do so below.

1. Update address changes

Addresses change way more often than you'd think. Hundreds of thousands of addresses change every year in the U.S. alone. Street numbers change to help first responders, to reflect changes in attitudes, or because the street names are very difficult to use or say.

Zip Codes change also, especially the ZIP+4 depending on the delivery route.

If you use an address key like SmartyKey™ then no matter how an address changes, your database will not be affected and will still be trustworthy.

2. Simplify data blending

Merging address databases is not unheard of. In fact, it's one of the primary reasons people require address standardization when considering address validation tools.

In the example John shared, you can see how two addresses that are similar can be normalized, standardized, and verified thanks to an address key.

3. Reduce processing time

Having to store addresses, or even large address keys can cause a problem when it comes to data storage and data processing. One software engineer reported that using a compact address key like SmartyKey saved them up to 20 hours each blending period.

For an example John showed how a Google Place ID could take up to 86 bytes of storage, while a compact integer address key would only take up 10 bytes. Talk about data savings!

4. Protect PII

There are several reasons why address keys make your address data safer for you and your contacts. For every piece of PII you have, you increase your chances of liability. You can learn more about this here.

There are several benefits to using an address key when it comes to PII.

  • Randomly generated keys can't be reverse-engineered
  • When sharing data you can replace the address with the key
  • You can combine another piece of PII to an address key without increasing risk

5. Enhance property data

Address validators may offer property data enrichment, and having an address key makes appending information to your database a snap.

It's of value to note that enriched property data is typically public information and does not count as additional PII.

Having additional data points improves business intelligence and helps with analysis and decision-making. One example would be when working in insurance or real estate.

SmartyKey access

You can get access to Smarty's premium address key in several of our products. 
SmartyKey

US Master Address List

US Rooftop Geocoding

If you'd like to view the full recording, you can do so here.

Learn from our expert! Join the webinar with John Hickey to understand address keys' role in data enhancement, protection, and efficient management.

 

Subscribe to our blog!
Learn more about RSS feeds here.
Read our recent posts
How to build and validate address lists for direct mail marketing
Arrow Icon
Looking to build a direct mail marketing campaign? You’ve come to the right spot. Before you can send marketing mail like a pro, you’ll need to build a list of verified addresses. Otherwise, frequent misdeliveries and costly redeliveries can take the wind right out of your campaign’s sails. On top of that, a bad address list could lead you to miss out on mind-blowing postal discounts. 😱Don’t let bad addresses capsize your campaign. With a US Master Address List of over 210 million verified addresses—available by state, county, or nationwide—and shipshape US Address Verification, you can construct new lists or clean active ones with the swagger of a seasoned captain.
USPS API rate limit capped at 60 requests per hour: How to prepare and why many are choosing Smarty
Arrow Icon
Because who doesn’t love juggling one more thing during the holiday season…? A major shift in the address-verification landscape is approaching at the beginning of the new year. On January 25, 2026, the United States Postal Service (USPS) will officially retire its long-standing Web Tools APIs, a free API that previously allowed for approximately 5 address lookups per transaction. This includes the legacy USPS Address Information APIs that many organizations have depended on for years. Under USPS’s new API structure, the default quota for many services, including the Addresses API, is 60 requests per hour.
Pinpoint 2025: Day 1 recap
Arrow Icon
For two days, Smarty users gathered together with other address data experts for Pinpoint, Smarty’s first virtual user conference, where developers, industry experts, and product specialists talked all things addresses and pulled back the curtain on address data solutions. Attendees asked questions about cloud-based software, the impact of accurate address data on fintech and insurance companies, and the ROI of good address data across all industries. Plus, attendees got to take a peek behind the scenes and see what makes Smarty’s address data solutions tick.

Ready to get started?