ZIP codes beginning with 113 are administered from a sectional center at Flushing Post Office.
2.
A sectional center facility may have more than one three-digit code assigned to it.
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The United States Postal Service also operates a large sectional center facility ( SCF ) for the 995xx ZIP Codes.
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For example, the Northern Virginia sectional center facility in Merrifield is assigned codes 220, 221, 222 and 223.
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In general, the first three digits designate a sectional center facility, the mail sorting and distribution center for an area.
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Typically this occurs when the locality is so isolated that it is most conveniently served from a sectional center in another state.
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When a sectional center facility's area crosses state lines, that facility is assigned separate three-digit prefixes for the states that it serves.
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In 1963, the Sectional Center concept of transit mail service was announced, along with the introduction of a ZIP Code on mail to facilitate mechanized processing.
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Outgoing mail was picked up from this post office twice a day weekdays and once on weekends and taken to the Sectional Center Facility on Enterprise Drive for further processing.
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Development of the U . S . Postal Service sectional centers duplicated many of the functions of the terminal RPO, and the terminals were phased out by the 1960s.
