Intelligent Mail Barcode
Intelligent Mail was come into existence in USA, 2003 and height modulated barcode font easily encode up to 31 decimal digits of specific mail part into sixty five vertical bars. And barcode font is also known by name of USPS4CB, USPS IM, 4CB, 4-CB, one code solution and many more.
Character Set is consists of digits (0-9) and automatic check digits.
Intelligent Mail ids capable to track 20 numeric digits along with delivery point zip code (0-11 length). The structure is initial defined by tracking code which is then divided into barcode identifier (2 digits), service type identifier (3 digits), mailer identifier (6 or 9 digits based on serial number), and serial number (6 or 9 digit Mailer ID).Routing number is assigned by mailer for mail segment touting and mailer can set routing to 5, 9, 11 digits or empty.
Used for tracking letters, and easily sort individual mails.