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Locatable Address Conversion System
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<p>Locatable Address Conversion System (LACS) is a service offered by the <a href="/facts/United_States_Postal_Service/1Je8qAHF">United States Postal Service</a> to update mailing addresses when a street is renamed or the address is updated for <a href="/facts/9-1-1/8IRJCy4X">911</a>. In the case of 911, the address is changed from a rural route format to an urban/city route format. E.G. RR 2 BOX 8, SOME CITY, TX would become 2601 BELMONT DR, SOME CITY, TX. </p><p>A check of address using LACS is typically not performed by the USPS, but by third parties who license the LACS data from the USPS. A licensee will create or purchase software to perform the LACS check and receive monthly or bi-monthly updates of LACS data from the USPS. </p>