June 22, 2017 
 
FCC FACT SHEET* 
Advanced Methods to Target and Eliminate Unlawful Robocalls 
Second Notice of Inquiry - CG Docket No. 17-59 
 
Background:  The Chairman has proposed a Second Notice of Inquiry (Second NOI) to look into using 
numbering information to create a comprehensive resource that businesses can use to identify telephone numbers 
that have been reassigned from a consumer who has consented to receiving calls to a consumer who has not 
consented to such calls.  Calls unknowingly made to reassigned numbers can annoy the new consumer getting 
them and deprive the previous consumer of an expected call.  Robocalls and telemarketing calls are consistently 
the top source of consumer complaints received by the FCC.  The creation of a comprehensive resource 
businesses can use to identify reassigned numbers before making calls would help alleviate this problem. 
 
What the Second NOI Would Do: 
? Seek comment on requiring voice service providers that use North American Numbering Plan telephone 
numbers to report when numbers are reassigned. 
? Ask whether such a requirement should apply to service providers, including many interconnected VoIP 
providers, that do not obtain numbers directly from the numbering administrators. 
? Inquire on how to make reassigned number information available to callers, including an FCC-established 
reassigned numbers database. 
? Seek comment on technical details about reassigned numbers information, including format, updates, and 
tracking access to the data. 
? Ask whether, and if so how, voice providers and database operators should be compensated for reporting 
or providing access to reassigned number information. 
? Seek comment on the privacy, security, and sensitivity of the reassigned number information. 
                                                            
* This document is being released as part of a "permit-but-disclose" proceeding. Any presentations or views on the subject 
expressed to the Commission or its staff, including by email, must be filed in CG Docket No. 17-59, which may be accessed 
via the Electronic Comment Filing System (https://www.fcc.gov/ecfs/).  Before filing, participants should familiarize 
themselves with the Commission’s ex parte rules, including the general prohibition on presentations (written and oral) on 
matters listed on the Sunshine Agenda, which is typically released a week prior to the Commission’s meeting.  See 47 CFR § 
1.1200 et seq.