Regional Codes ...
For statistical purposes, the US Census Bureau has divided the country into four Regions. Mountain Brook is located in Region #3 (the South Region).
In turn, the US Census Bureau has further divided each Region into Divisions. Mountain Brook is located in Division #6 (the East South-Central Division).
The Office of Management and Budget (OMB) has created ten Federal Regions. Mountain Brook is located in Region IV (Region 4).
Referenced GNIS Records ...
GNIS ID #123502 (Name of Record: Mountain Brook)
Class: populated place
A place or area having clustered or scattered buildings and a permanent population (such as a city, settlement, town or village). The boundaries may or may not coincide with the perceived population.
A 'populated place' record may have a corresponding 'census' or 'civil' record. The information contained in the 'populated place' record applies only to the class and should not be confused with either the 'census' and 'civil' classes.
Map Name: Huntsville
Lat: 34.725091 Lon: -86.547769 [Map]
Elev: 226 ft.
Referenced FIPS Records ...
FIPS Code: 01/51720 (Place Name: Mountain Brook)
County: Madison (FIPS State/County: 01/089)
Identifies a populated place (ie- Mountain Brook) which is wholly or substantially located within the boundaries of an incorporated place with a different name. The Part of Code identifies the incorporated place.
MSA Code: 3440