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TextFree (formerly called Pinger and sometimes stylized as textfree) is a mobile application and web service that allows users to send and receive text messages, as well as make and receive VoIP phone calls, for free over the internet. The service costs nothing because it is supported by ads, but users have the option of paying for an ad-free ...
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
A virtual number is a telephone number that is not directly associated with a telephone line. It is used to forward incoming calls to one or more pre-set telephone numbers chosen by the client. Virtual numbers are often used for privacy reasons, as they allow users to keep their personal phone numbers private while still receiving calls.
PrimeCo Personal Communications, L.P. (later known as Chicago 20 MHz, LLC [1]) was a joint venture of Bell Atlantic, Nynex, US West and AirTouch Communications, and was the first wireless telecommunications provider to turn up CDMA service on the PCS (1900-MHz) band in November 1996. [2]
An unpublished number is also excluded from directory assistance services, such as 411. Landline telephone companies often charge a monthly fee for this service. As cellular phones become more popular, there have been plans to release cell phone numbers into public 411 and reverse number directories via a separate Wireless telephone directory ...
The Chicago metropolitan area – also known as "Chicagoland" – is the metropolitan area associated with the city of Chicago, Illinois, and its suburbs. [2] With an estimated population of 9.4 million people, [ 3 ] it is the third largest metropolitan area in the United States [ 4 ] and the region most connected to the city through geographic ...
The term "red box" to refer to a phreaking box dates to 1973 or earlier. [1] Red box use became more widespread in the 1990s following the publication in 2600 Magazine of instructions on how to make a red box by replacing a crystal oscillator in a tone dialer. [2]
With the implementation of 872, all local calls in Chicago must be dialed with the full 11-digit phone number (10 digits from cell phones). [ 1 ] The Illinois side of the Chicago area–312/773/872, 708/464 , 847/224 , 630/331 and portions of 815/779 –is one of the largest local calling areas in the United States; with few exceptions, no long ...