The LACSLink® database on CD-ROM for $19

LACS is the Postal Service™ acronym for Locatable Address Conversion System, which supports the conversion of rural-style addresses to street-style addresses. LACSLink is the Postal Service database that allows ZP4 to automatically perform conversions from one address style to another, as described below. A LACSLink disc is typically purchased at the same time as a ZP4 disc. ZP4 can be purchased without a LACSLink disc, but purchasing a LACSLink disc requires purchasing the corresponding ZP4 disc.

Most of the records in the LACSLink system are for changing rural-style box numbers to street names. For example,

RR 1 BOX 127A is converted to 17255 SCENIC RD

Some LACSLink records handle renumbered Post Office™ boxes. For example,

PO BOX 123 is converted to PO BOX 555123

Some LACSLink records handle changes when streets are renamed and the house or apartment number also changes. For example,

905 LOWER AVE is converted to 1125 FREEDOM DR

The LACSLink database occupies approximately 360 megabytes, and is available on a separate LACSLink CD-ROM when ordering ZP4 (LACSLink lookups require ZP4). A LACSLink CD-ROM is released every month, for use with the corresponding ZP4 edition. Once LACSLink data is installed, ZP4 automatically performs LACSLink conversions like those shown above. The conversion of rural box addresses to street addresses by local governments is ongoing. The LACS flag indicates if any ZIP + 4® database record includes addresses that can be converted using LACSLink.

LACSLink lookups may not be performed after the two-month expiration date of the LACSLink database. The product's license prohibits using LACSLink for the manufacture of address lists, and also prohibits the LACSLink database being exported outside the United States. A "violation" will occur if ZP4 detects LACSLink is being used to generate address lists, and subsequent LACSLink output will be suppressed until a restart code is obtained from Semaphore Corporation to clear the violation. Violation monitoring and enforcement is a requirement of the Postal Service. Semaphore Corporation is required to notify the Postal Service of your name and address when you request a LACSLink restart code. If you repeatedly generate LACSLink violations, the Postal Service will prohibit you from continuing to use the LACSLink system.

Both LACSLink and DPV® are required to determine the proper CASS™ ZIP + 4 code for an address.

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Semaphore Corporation is a non-exclusive licensee of the United States Postal Service®. The prices of Semaphore Corporation products are not established, controlled or approved by the Postal Service. The following trademarks are owned by the United States Postal Service: CASS, DPV, LACSLink, Post Office, ZIP + 4, Postal Service, and United States Postal Service. [DA#4.07]