150 Years Since First Telephone Call

Alexander Graham Bell's invention sparked a communication revolution that continues today

Published on Mar. 10, 2026

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On March 10, 1876, Alexander Graham Bell made the first telephone call from his Boston laboratory to his assistant Thomas Watson in the next room, setting off a revolution in communication. Over the past 150 years, telephones have evolved from a single copper wire to the nation's largest network of fiber-optic broadband and wireless services, powering connections for a new generation.

Why it matters

Bell's invention of the telephone sparked an entirely new way for people and businesses to deepen connections and thrive. While voice calls now make up a small portion of modern communications, the telephone network continues to be a critical part of how we connect with each other and the world around us.

The details

A year after the first call, Bell started the Bell Telephone Company that became American Telephone & Telegraph, now known as AT&T. The first private phone line in the U.S. was built between Boston and Somerville, Massachusetts in 1877, and phone numbers were assigned to customers in 1879 to make it easier for operators. Over the years, AT&T faced concerns about being a monopoly, leading to orders to share scientific findings, sell off stock, and eventually break up in 1984. Today, AT&T is committing over $250 billion in investments through 2030 to continue updating the telecommunications network with fiber and 5G services.

  • Alexander Graham Bell made the first telephone call on March 10, 1876.
  • The first private phone line in the U.S. was built between Boston and Somerville, Massachusetts in 1877.
  • Phone numbers were assigned to customers in 1879 to make it easier for operators.
  • Concerns about AT&T being a monopoly started being raised in the early 1900s.
  • AT&T was ordered to break up into one long distance company and a number of local companies that handled regional calls in 1984.

The players

Alexander Graham Bell

The inventor who made the first telephone call in 1876, sparking a revolution in communication.

Thomas Watson

Bell's assistant who received the first telephone call in the next room of Bell's Boston laboratory.

AT&T

The company that was started by Bell a year after the first telephone call and grew to become the nation's largest network of fiber-optic broadband and wireless services.

John Stankey

The chairman and CEO of AT&T who said the first phone call sparked an entirely new way for people and businesses to deepen connections and thrive.

Diamond State Telephone

The telephone company that operated in Delaware before the regional name of Bell Atlantic.

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What they’re saying

“The first phone call sparked an entirely new way for people and businesses to deepen connections and thrive. Today, we carry the spirit of communication forward in bold new ways, powering connections for a new generation – more instantaneous, seamless and limitless than ever before.”

— John Stankey, Chairman and CEO of AT&T (AT&T press release)

What’s next

To continue updating the telecommunications network, AT&T is committing more than $250 billion in investments through 2030, including fiber networks and 5G services.

The takeaway

Bell's invention of the telephone 150 years ago has led to a revolution in communication that continues to this day, powering connections and deepening relationships in increasingly instantaneous, seamless and limitless ways.