Contacts 411 updates and adds to personal & business contacts with the most up-to-date, verified, publicly available info. You can even merge duplicate contacts into one!

Needing to network with old acquaintances, working in not-for-profit development or in for-profit sales? If you are looking to reconnect using the best quality contact data, Contacts 411 enables you to easily find new and updated contact information — emails, phone #'s, mobile #’s and addresses. It also makes it easy to clean up those pesky duplicate contacts.

*Search for new email, phone numbers, mobile numbers and addresses on your existing contacts by connecting to your Address Book while keeping your address book private.

*Search for more and confirm information on new contacts before you add them to your address book.

* Clean up duplicate contacts with our easy to use merge tool.

*One-touch calling, texting, emailing and mapping of updated and confirmed contact info.

*Easy one-touch saving of new contact info.

Contacts 411 Unlimited Plan can be purchased as one month pass for $19.99 or yearly subscription for $49.99/year. Your annual subscriptions will auto-renew. You can turn off auto-renew at least 24 hours before your billing period ends. You can do this in your iTunes Account Settings. With this purchase only your iTunes Account will be charged. Your iTunes Account will only be charged once your purchase is confirmed.

Auto-restore of your subscriptions is available. If you should ever change devices, your Contacts 411 Account will be automatically restored upon signing into the app.

Terms of Service: Privacy Policy:

What’s New

Version 2.65.4

- UI improvements and bug fixes.

Ratings and Reviews

4.3 out of 5
43 Ratings

43 Ratings

PTuson ,

A lot of potential

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. I’m giving it 4 stars because I think it works just fine, but there are some features that I'd love to see: a profile photo, the indicated age is nice, but a photo would be much easier to help determine if it found the right person. I'd also love to see some social media as this is one of the main ways I get in contact with people. It looks like the app is being worked on regularly and I look forward to seeing how it develops.

Schrammmic ,

Convenient, intuitive, useful!

Contacts411 is an incredibly useful app. It helps me stay up to date on the contact information of all of my clients. The simple interface hides its very powerful search function. Great for finding addresses, phone numbers, and even emails! Whether you’re looking to confirm existing info or find new info, Contacts411 does it all. This is particularly well-suited to anyone working in non-profit development, for-profit sales, or any other business where relevant information is key.

Developer Response ,

Thank you for your review and we are thrilled that you find the app useful. Since we are a new app, we would so appreciate learning what is working well for you and what is not. Please reach us via email at We are constantly trying to improve all aspects of the experience and welcome all feedback.

JeanettMLee ,

Straightforward and effective

I have an event coming up and wanted to make sure the info I have on everyone is correct. The app used the contact info I already have to see if they can verify the info on their end and also give new info, if there is any. A couple of my contacts didn't show anything new, but I figure their info is already current.

App Privacy

The developer, Infinite knot Inc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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