First consult the Form 477 Instructions, Fixed Broadband Deployment Terms, and Fixed Broadband Deployment Formatting Information for information on what to include in and how to format this data file.

Below are four options for creating your fixed broadband deployment file for Form 477:

1. National Broadband Map Data

If you participated in the collection of data by NTIA's State Broadband Initiative for the National Broadband Map, you can download the data published on the map.  These data consist of lists of census blocks in which providers offered broadband service as of June 30, 2014.  The data are posted by state in Microsoft Access format.  Some entities with mapping expertise that participated in the State Broadband Initiative may be available to assist Form 477 filers, on a commercial basis; for example, see Connected Nation and Michael Baker International.

2. Mapping Software 

You can use GIS mapping software (MapInfo, ArcMap, and QGIS are examples) to determine the census blocks that are at least partially covered by their company’s broadband service footprint or network coverage area.  We offer instructions on how to use QGIS to figure out which census blocks are in you service area.  QGIS is a free, open source mapping program.

3. Customer Addresses 

If the census blocks in which you have customers are the same as the census blocks of your service area, then you can use the Census Bureau's geocoder to figure out the census blocks of your customers' service addresses.

4. Census Tracts 

If you make service available in all of the census blocks that make up the census tracts where you have customers, you can find the census block codes that make up those census tracts in the lists of census blocks by state.

Hints on Census Block Codes

Bureau/Office: 

Updated: 
Thursday, September 25, 2014