The Form 477 filing interface is open! The new filing deadline for data as of June 30, 2021 is September 15, 2021 and for filers in Louisiana and Mississippi affected by Hurricane Ida, the new filing deadline is October 1, 2021. 

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• New Login:  A CORES Username and Password are required to log in to the Form 477 filing interface. For info on getting a CORES username and password, click here and for a preview of the new login procedure, click here.
   
• Where's my FRN?:  If you log into the Form 477 filing interface and don't see your FRN(s) listed in the drop-down box but have already associated the FRN(s) with you CORES username, please send an email containing your CORES username and FRN to 477INFO@fcc.gov
   
• Mobile Deployment Maps:  All geometries must be well-formed in 2D according to the OGC (Open Geospatial Consortium) rules. Invalid geometries will be reported to the user, but maps containing invalid geometries will not be accepted by the system. Please see our voice & broadband tip sheets for more info.  If you have questions, please email 477INFO@fcc.gov.
   
• Census Geography Codes:  You must continue to use Census 2010 geographic codes in FCC Form 477 until further notice.  We cannot switch to 2020 codes until more detailed data are available in 2020 geographies.
   
• Does FCC Form 477 = Broadband Data Collection?  Not exactly. The two collections are related, but different.  Please see the Broadband Data Collection page for more info.

Filing Form 477:

• Filing Interface 
• Who Must File Form 477? (PDF) updated 12/23/19
• Obtain an FRN (FCC Registration Number) or username from FCC CORES if you do not already one. 
  • Reset an FRN password or username password if necessary.
• For help, send an e-support request or call 1-877-480-3201 or 1-717-338-2824 (TTY).

Instructions, Guides & FAQs:

• Changes to Form 477 in 2019 and 2020 (PDF) updated 6/18/20
• Instructions (PDF) updated 6/19/21
• Resources for Each Form Section: Formatting Info, Templates, Sample Files updated 12/23/19
• Glossary of Form 477 Terms (PDF) updated 12/23/19
• Creating Fixed Broadband Deployment Data
• Using CSV Files in Excel
• Interface User Guide (PDF) updated 6/30/21
• Frequently Asked Questions (PDF)
• Resources for Filings through June 30, 2019 updated 6/19/21

Geographical Resources:

• Overview of Census Tracts (PDF)
• List of Valid 2010 Census Tracts (Excel)
• U.S. Census Bureau - Census Tract Maps
• Visualizing Census Tracts in Google Earth (PDF)
• Overview of Census Blocks (PDF)
• List of 2010 Census Blocks by State
• U.S. Census Bureau - Census Block Maps
• Using Census's Geocoder (PDF)
• Find Your Service Area Census Blocks Using QGIS (PDF)

Data & Reports:

• Fixed Broadband Deployment Map
• Fixed Broadband Deployment Census Block Data
• Mobile Broadband and Voice Deployment Data
• Internet Access Services Reports
• Voice Telephone Services Reports
• Broadband Progress Reports
• Additional Form 477 Data
• How State Commissions Can Obtain Form 477 Subscription Data

Orders and Releases:

• Form 477 Orders and Releases
   

Need Help or Have Form 477 Questions:
Email 477info@fcc.gov or call 202-418-0940.