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Information technology


The Postal Service has one of the world’s largest computer networks —linking nearly 32,000 facilities and making communication possible between hundreds of thousands of employees and hundreds of systems.

  • With one of the largest corporate email systems, the Postal Service handles more than 12 million legitimate emails a day delivered to more than 214,000 email accounts.
  • There are 575 remote locations within the postal system that receive network connectivity via satellite.
  • Our communications network supports and maintains more than 145,000 desktop computers, 23,000 notebook computers, 81,000 printers, 12,500 smart-phones, 400,000 phone lines and 310,000 hand-held scanners.
  • The Postal Service has 35 petabytes of storage capacity — equivalent to playing more than 88,700 years of songs on an MP3 player with no repeats.
  • Nearly 105,000 meetings per month are hosted online, representing more than 32 million minutes of conference time.
  • The Postal Service maintains 45,000 point-of-sale terminals and 2,837 self-service retail kiosks nationwide supported by the IT team.
  • There are nearly 1.45 million email messages blocked monthly due to spam, more than 400,000 blocked emails due to content, and 21,000 blocked malware attempts.
  • More than 381 million credit and debit card transactions are processed annually through IT systems in Post Offices and through usps.com.
  • There were 10 billion page views on usps.com in 2016.

Decoding the Code.

The Zone Improvement Plan (ZIP) Code was launched in 1963 to better handle increasing volumes of mail. The first number in the code represents a general geographic area of the nation, “0” in the East, moving to “9” in the West. The next two numbers represent regional areas, and the final two identify specific Post Offices. The ZIP+4 Code was introduced in 1983. The extra four numbers allow mail to be sorted to a specific group of streets or to a high-rise building. In 1991, two more numbers were added so that mail could be sorted directly to a residence or business. Today, the use of ZIP Codes extends far beyond the mailing industry, and they are a fundamental component in the nation’s 911 emergency system.

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