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Update, enhance, and merge your contacts
with ease

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securely update and merge your contacts with ease

how it works
Creating connection for your business and personal life.

Quickly and securely update your contacts

Trusted by:

better connections with fresh data


Quickly, easily, affordably update your entire customer or donor contact list via a simple CSV file upload, or an even simpler direct sync for those who use Mailchimp.


At your request, we check over 240 million US consumers and 150 million US business individual contacts across 13,000+ public record data sources.


Enrich partial contact information with validated phone #s, emails, and addresses. B2B subscribers receive job title, company name, department, URL, and business descriptions too!


Contact data is dynamic and erratic. 50% of business contact data changes annually. 36% of consumer contact data changes annually. To stay competitive, companies need to keep their contact data up-to-date. Not only can Contacts411 do this, we can augment your contact information with additional attributes, helping you deepen your connection with your customers.

incomplete data

Full name

Mobile phone

Personal email

home address


Triple Verified Data

+ personal data

Full Name

Mobile Phone

Personal email

home address


+ business data

Company name

Job title & department

business phone

business email

business address

company URL

data delivered, not stored.®
once your update is complete, your contact data is removed from our systems. we do not store, share, or sell your data. it's yours.

download the
free app

You know the drill, give Apple
your creds and sign in.

fetch with confidence

Our patented process lets you securely update and enrich your contact information with the best quality privacy compliant contact data available.

identify duplicates + merge

Don't waste money (or annoy your customers) by sending multiple marketing emails. We make it easy to clean up your duplicates and keep the best information from each record.

lOOKING to augment your app or service?

Add privacy compliant contact enrichment functionality to your app, website, or service through our simple, real-time API.

contact us

connection matters. make it count every time


We’re givers, not takers. Unlike some competitors who add your address book information to their database, any contact info you update through Contacts411 remains yours and only yours. Your address book stays private to you.


We check updates on 230+ million U.S. consumer and 75+ million business contacts across 13,000+ publicly available, TRIPLE VERIFIED data sources. We also confirm when your existing contact information looks good.


We keep it simple. The app is seamlessly integrated with your iOS address book. With a single touch you can add new contact info to your address book or call, text, email, or map the address.

Don't just take
our word for it

“The app does exactly what it says it will - finds, updates and verifies contact info. It found new info for four out of the seven contacts that I tried...”


“Helped me connect with tons of people that I had lost touch with. This is an excellent resource and I would refer it to everyone I know! Download it now.”


“I am so thrilled to have reconnected with old and dear friends. Also, so impressed with how easy it is to update peers in business.”


“I absolutely love this app. This app not only makes discovering my business contacts easier, but it also makes it easy to update information on my friends.”


"Contacts411 is an incredibly useful app. It helps me stay up to date on the contact information of all my clients. The simple interface hides its very powerful search function...”


Get connected with Contacts411®

Save time
Skip the frustration
Protect your data