According to the Wireless Telecommunication and Public Safety Act, what was established as the national emergency number?

The national emergency number established by the Wireless Telecommunications and Public Safety Act is 911. This number is recognized across the United States as the primary number for citizens to reach emergency services such as police, fire, and medical assistance. The Act was instrumental in enhancing the effectiveness of public safety communication and ensuring that emergency services could be accessed quickly and efficiently through a universally recognized number.

In contrast, the other options listed do not serve as the established national emergency number in the U.S. While 112 is used in many countries worldwide as an emergency number, it does not have the same designation in the U.S. The numbers 800 and 9110 are not recognized emergency numbers for public safety in the United States. Therefore, 911 stands out as the correct answer due to its official recognition and use in emergency situations.