411 Baja

4-1-1 is the telephone number for local directory assistance in the United States and Canada. One exception is the Pacific Northwest, which used 1-1-3 until the mid-1980s. Until the early 1980s, 411 calls were free in most states.

4-1-1 has also been used for long distance directory assistance in most areas in the United States and all of Canada. The traditional long distance directory assistance number is 1-area code-555-1212. 411 is also commonly referred to as "DA" - "Directory Assistance" or "Information".
Approximately 6 billion calls are made to 411 within the United States every year.

the # 411 comes along with the thought of information - dial 411 to get info on a phone number. The term Yellow Pages refers to a telephone directory of businesses, categorized according to the product or service provided. As the name suggests, such directories were originally printed on yellow paper, as opposed to white pages for non-commercial listings. The traditional term Yellow Pages is now also applied to online directories of businesses.

The name and concept of "Yellow Pages" came about in 1883, when a printer in Cheyenne, Wyoming working on a regular telephone directory ran out of white paper and used yellow paper instead. In 1886 Reuben H. Donnelley created the first official yellow pages directory, inventing an industry.