Number Portability Best Practices

The members of the Number Portability Industry Forum (NPIF) formerly known as 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 were 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 NPIF regarding the preferred processes for porting. The NPIF meetings are open to all telephony carriers. Anyone attending the meetings may bring a suggested Best Practice to the group for discussion and possible inclusion in these approved Best Practices. The NPIF 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 the Best Practice remains on the web site with the explanation that it was deleted.

Please Note: Best Practices 001 - 044 were developed and agreed to by the Wireless Number Portability Operations (WNPO) team.

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


Title Date Name Document
BP 081 02/14/2024 Communication guidelines process associated with SPID Migrations Download
BP 080 04/12/2023 Handling of incomplete or Abandoned Ports when the OSP is a Wireless Carrier Download
BP 079 11/08/2022 Limit NPAC Porting During SP Maintenance Windows Download
BP 078 09/13/2022 Service Outage Prevention and Mitigation Download
BP 077 11/02/2021 LSMS Record Management Download
BP 076 10/04/2021 AltSPID – LastAltSPID field population Download
BP 075 06/08/2022 Response Interval Guidelines for End User Issues after Port Activation Download
BP 074 05/06/2019 Retry Timers and Intervals Download
BP 073 09/10/2019 Unauthorized Port Flow Download
BP 072 09/13/2017 Service Provider E-Mail Guidelines Download
BP 071 11/04/2015 Wireless Reseller Port Out Validation Requirements Download
BP 070 05/01/2011 Required information for Customer Service Record (CSR) requests Download
BP 069 05/10/2011 Large Port Notifications Download
BP 068 05/01/2011 Stolen Telephone Numbers Download
BP 067 05/10/2011 Processing Interval for Simple, Non-Simple, Porting Project and Customer Service Records (CSR) (*) Download
BP 066 05/25/2010 Master billing accounts and the impact to the End User's ability to port in one day (*) Download
BP 065 05/04/2010 LSR SUPPs, Expedites, Due Date Changes (*) Download
BP 064 02/09/2010 Industry Notification of Service Provider LNP System and Process Changes (*) Download
BP 063 02/09/2010 Sending of the LSR Response to the New Network Service Provider (NNSP) (*) Download
BP 062 02/01/2010 DELETED -- Start of the 4-hour FOC response interval when LSR is for Simple Port (*) Download
BP 061 12/22/2009 Additional permitted use of Conflict Cause Value 51 (*) Download
BP 060 09/16/2009 Impact to the porting process of SP-assigned pass codes/PINs to End User accounts (* and **) Download
BP 059 05/04/2009 Use of certain SV Optional Data Fields and SV Optional Data Parameters Download
BP 058 05/06/2009 Handling of Disputed Ports Download
BP 057 02/27/2009 Impact of breaking pooled blocks into individual SVs Download