Local Number Portability Best Practices

The members of the Local Number Portability Administration Working Group (LNPA WG) have created "Best Practices" for porting between and within telephony carriers. These Best Practices have not been mandated entirely, and in many cases are considered a gentleman's agreement on porting between carriers.  However, many of the Best Practices have been presented to the North American Number Council (NANC) for approval and, after NANC's approval, forwarded on to the FCC.  Several of these Best Practices are flagged with asterisks to indicate which have been endorsed by the NANC (*) and which have been adopted by the FCC(**).

The Best Practices reflect the consensus of the LNPA WG regarding the preferred processes for porting.  The LNPA WG meetings are open meetings.  Anyone attending the meetings may bring a suggested Best Practice to the LNPA WG for discussion and possible inclusion in the LNPA WG approved Best Practices.  The LNPA WG periodically reviews the Best Practices to determine whether each remains applicable to the current porting environment.  Based on these reviews, a practice may be modified or deleted.  If a Best Practice is deleted, the number of a Best Practice remains on the web site with explanation that it was deleted.

Please Note: Best Practices 0001 - 0044 were developed and agreed to by the Wireless Number Portability Operations (WNPO) team.

The following is an index of the existing LNP Best Practices. Click on the download button for more detail.


Title Date Name Document
0074 05/06/2019 Retry Timers and Intervals Download
0073 05/02/2017 Unauthorized Port Flow Download
0072 09/13/2017 Service Provider E-Mail Guidelines Download
0071 11/04/2015 Wireless Reseller Port Out Validation Requirements Download
0070 05/01/2011 Required information for Customer Service Record (CSR) requests Download
0069 05/10/2011 Large Port Notifications Download
0068 05/01/2011 Stolen Telephone Numbers Download
0067 05/10/2011 Processing Interval for Simple, Non-Simple, Porting Project and Customer Service Records (CSR) Download
0066 05/25/2010 Master billing accounts and the impact to the End User's ability to port in one day Download
0065 05/04/2010 LSR SUPPs, Expedites, Due Date Changes Download
0064 02/09/2010 Industry Notification of Service Provider LNP System and Process Changes Download
0063 02/09/2010 Sending of the LSR Response to the New Network Service Provider (NNSP) Download
0062 02/01/2010 DELETED -- Start of the 4-hour FOC response interval when LSR is for Simple Port Download
0061 12/22/2009 Additional permitted use of Conflict Cause Value 51 Download
0060 09/16/2009 Impact to the porting process of SP-assigned pass codes/PINs to End User accounts Download
0059 05/04/2009 Use of certain SV Optional Data Fields and SV Optional Data Parameters Download
0058 05/06/2009 Handling of Disputed Ports Download
0057 02/27/2009 Impact of breaking pooled blocks into individual SVs Download
0056 12/22/2008 Delayed update of SMS message address after porting Download
0055 03/11/2008 DELETED -- FCC Order 07-188 impact on LNP provisioning flows; WG proposal for more required LSR fields Download
0054 02/05/2008 Porting prevented because current service in effect for less than 30 days Download
0053 11/05/2007 Duration of Porting Outages Due to Planned SP Maintenance Download
0052 11/05/2007 Resellers Discontinuing Business and/or Declaring Bankruptcy Download
0051 07/06/2007 Proper and Timely Updates to LNP Routing Databases Download
0050 07/06/2007 Porting in conjunction with Foreign Exchange (FX) Service Download