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The FHFA House Price Index (FHFA HPI®) is a comprehensive? collection of publicly available house price indexes that measure changes in single-family home values based on data that extend back to the mid-1970s from all 50 states and over 400 American cities.

Frequency of ZIP Code Changes It is typical for 10-20 new ZIP codes to be created each year - many of which are for military uses.

ZCTAs or ZIP Code Tabulation Areas were created by the U.S. Census Bureau and are generalized representations of ZIP Codes that have been assigned to census blocks. Therefore, ZCTAs are representative of geographic locations of populated areas. In most cases, the ZCTA will be the same as its ZIP Code.

The first three digits of a ZIP Code together usually indicate the central mail processing facility, also referred to as a sec center or sectional center facility to which that ZIP Code belongs. This facility is the mail sorting and distribution center for a zone or area.

Because ZIP+4 codes are based on delivery routes, they change when the postal delivery routes are updated by the USPS. That's why ZIP+4 codes can change as often as once a month, since there are several factors that can result in the USPS updating its delivery routes.

Due to an increase in population or to the improve postal operations, the US Postal Service® will occasionally add a new ZIP Code or change ZIP Code boundaries.

A ZCTA code may be the same as a ZIP Code in some cases, but in other cases crosswalking the two may be necessary. USPS ZIP Codes are updated monthly. US Census ZCTA codes are updated decennially.