Regional Codes ...
For statistical purposes, the US Census Bureau has divided the country into four Regions. South Side is located in Region #3 (the South Region).
In turn, the US Census Bureau has further divided each Region into Divisions. South Side is located in Division #7 (the West South-Central Division).
The Office of Management and Budget (OMB) has created ten Federal Regions. South Side is located in Region VI (Region 6).
The Federal Emergency Management Agency (FEMA) has created ten Management Regions. South Side is located in Region VI (Region 6).
Referenced FIPS Records ...
FIPS Code: 05/65690 (Place Name: South Side)
County: Pulaski (FIPS State/County: 05/119)
Identifies a populated place (ie- South Side) 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: 4400