US phones were affected by more than 50 billion automated calls in 2021, according to YouMail Robocall Index

In december 2021, Americans received just under 3.6 billion automated calls, down 13% from November and the fewest calls in a month june 2020. In December, robocalls averaged 115.1 calls / day and 1332 calls / second compared to November, during which robocalls averaged 137.4 million calls / day and 1 590 calls / second, down 16% on a daily basis. The drop was caused by a sharp drop in the last few weeks of the month as robocallers appeared to have taken time off for the holiday season.

These latter figures are provided by YouMail, a completely free automated call blocking application and call protection service for mobile phones. These numbers are determined by extrapolation from automated call traffic attempting to reach the millions of active YouMail users.

“The good news is that monthly robocalls continue to be at a lower level since the deployment of STIR / SHAKEN on June 30the“Said the CEO of YouMail Alex Quilici. “The bad news is that the total number of robocalls again exceeded 50 billion for the year, which translates to roughly 200 robocalls this year for every adult with a phone.”

Spam and fraudulent calls represent a significant percentage of calls

In December, the number of fraudulent calls fell 4%, while telemarketing calls fell 18%, payment reminders fell 18%, and alerts and reminders fell 11%. While all types of calls decreased during the holidays, fraudulent calls decreased the least, as it appears robo-callers took little time off.

Type of

Robotic call

Estimated December

Automated calls

Percentage December
Automated calls


1.3 billion (-4%)

37% (+ 4%)

Alerts and reminders

1.1 billion (-11%)

30% (+ 2%)

Payment reminders

0.58 billion (-18%)

16% (= 2%)


0.62 billion (-18%)

17% (-4%)

Overall for the year, the scams category tops the list with almost 30 billion fraudulent or spam calls, or just under 60% of all calls, a very significant number of likely unwanted calls.

Type of

Robotic call

2021 estimate

Automated calls

Percent 2021
Automated calls


21.4 billion


Alerts and reminders

13.1 billion


Payment reminders

7.4 billion



8.6 billion


“Winners” in december 2021

In December, the same cities, area codes and states that had the most automated calls in recent months continued to do so, although the number of calls was significantly lower than in previous months.

Cities with the most automated calls:

Atlanta, Georgia (143.7 million, -10%)

Dallas, Texas (130.6 million, -10%)

Chicago, Illinois (112.6 million, -12%)

Cities with the most automated calls / person:

Baton Rouge, LA (30.1 / person, -10%)

Memphis, Tennessee (28.5 / person, -11%)

Washington, DC (26.6 / person, -11%)

Area codes with the most automated calls:

404 in Atlanta, Georgia (60.9 million, -10%)

214 in Dallas, Texas (49.3 million, -10%)

832 in Houston, Texas (47.7 million, -14%)

Area codes with the most automated calls / person:

404 in Atlanta, Georgia (49.8 / person, -10%)

225 in Baton Rouge, LA (30.1 / person, -10%)

901 in Memphis, TN (28.5 / person, -11%)

State with the most automated calls:

Texas (422.4 million, -15%)

California (332.1 million, -9%)

Florida (279.6 million, -14%)

State with the most automated calls / person:

South Carolina (20.5 / person, -15%)

Tennessee (20.2 / person, -15%)

Louisiana (20.2 / person, -11%)

These data points are provided by YouMail, a free call protection application for mobile phones. YouMail recently won the Gold Stevie Award from the American Business Awards for Technical Innovation of the Year, and the YouMail app was named the nation’s best robocall blocking solution in a competition hosted by Geoffroy fowler from the Washington Post.

YouMail blocks unwanted robocalls by making sure the user’s phone does not ring, then broadcasts a decommissioning message that leads them to believe they’ve dialed an invalid number. YouMail identifies problematic numbers and robocalls using a combination of its recently patented audio fingerprint technology, call patterns and consumer feedback.

YouMail provides the YouMail automated calls index to estimate the volume of automated calls across the country and for specific area codes each month. This estimate is formed by extrapolating the behavior of the billions of calls YouMail has handled for its users, and these statistics are regularly cited by the FCC as the definitive source for national data trends.

For a full ranking of cities, states, and area codes, as well as details on auto caller behavior in each area code, please visit To listen to the actual voicemail messages left by automated callers, please visit the YouMail directory. To join the YouMail Robocall Index mailing list, please write to [email protected].

About YouMail, Inc.

YouMail protects consumers, businesses and carriers from harmful phone calls. YouMail protects consumers with app-based call protection services. YouMail protects businesses in direct contact with consumers by detecting and helping to stop impostor traffic that can lead to financial or brand damage. We protect operators with automated call mitigation services that detect when bad traffic originates, passes through or terminates on their networks. Our direct-to-consumer solutions answer over 1 billion live calls per year through more than 10 million registered users, powering America’s most robust telephone sensor network by identifying and providing zero protection time against illegal call campaigns and cyber attacks. We also operate the YouMail Robocall Index ™, the country’s definitive source on phone network activity and attacks. YouMail, Inc. is privately funded and based in Irvine, California.


Rohan Notaney for YouMail
Lumina Communications
[email protected]

SOURCE YouMail Inc.

About Anne Wurtsbach

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