Zip + 4 data

[Eric E. Snyder]

Does anyone know where I can obtain (via ftp or whatever) Zip + 4 
codes and city, state and address data?

Thanks!

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TTGATTGCTAAACACTGGGCGGCGAATCAGGGTTGGGATCTGAACAAAGACGGTCAGATTCAGTTCGTACTGCTG
Eric E. Snyder                            
Department of MCD Biology            We are not suspicious enough 
University of Colorado, Boulder      of words, and calamity strikes.
Boulder, Colorado 80309-0347
LeuIleAlaLysHisTrpAlaAlaAsnGlnGlyTrpAspLeuAsnLysAspGlyGlnIleGlnPheValLeuLeu
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