Natural SEO and SEM
Vertical Service Codes
A special code in North American telephony that is dialed prior to a telephone number that engages some type of special telephone service. Typically preceded by a star key (asterisk *) or followed by a pound key (#). Often referred to as "Star Codes", they are generally two digits, but new codes are 3-digit due to growth. Developed by AT&T in the 1960s, these services must be accessed vertically (through the local telephone company) rather than through any outside service.
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Vertical Service Codes
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