AT&T

1885–1900
The American Telephone and Telegraph Company was founded by Alexander Graham Bell in 1885.

1921–1939
This is the first documented use of the "Bell System" branding. Local versions of the logo included the name of the regional "baby bell" companies at the top of the ring, with the words "American Telephone & Telegraph Co." on the bottom.

1939–1964
The words on the ring from the second logo stayed the same, but the typeface and the hook on the bell were changed.

1964–1969
In 1964, the words "American Telephone and Telegraph Co." were removed from the ring, and the words "and Associated Companies" was moved to the bottom of a new wordmark reading the new abbreviated name of the company, AT&T.

1969–1983
This is the final version of the bell logo, designed by Saul Bass. The bell logo used here would continue to be used by the seven "baby bell" companies spun off of AT&T, as well as Western Electric Company.

1983–1996


In 1983, the wordmark's design remained the same, but the bell symbol was replaced by a blue globe with lines on the left side of it that seem to make a segmented circle. This logo was nicknamed the "Death Star".

1996–2005
In 1996, the globe design was slightly modified with its number of stripes being reduced to eight and three of them being removed from the globe (it originally had eleven stripes in the previous logo).

2005–2015
On November 21, 2005, a redesigned version of the 2000 logo was introduced as a result of SBC's acquisition of AT&T. The typeface at the bottom of the logo was changed and was made lowercase. This rebrand was created by the company Interbrand. In 2011, AT&T's trademark 4-note audio logo was added at the end their commercials. This logo is still used in most locations and SIM cards.

2015–present


On December 2, 2015, AT&T updated its globe logo for the first time in ten years, by having the white and blue colors on it trade places, making the stripes blue and the circle white (a motif similar to the 1983 "Death Star" logo). The wordmark was changed as well by being changed from lowercase to uppercase, and the darker blue circles inside globe were eliminated. Also, the 4-note jingle's sound was changed from "D-D'-E-B" to G-G'-A-E", and in a faster speed.