The statistic depicts the total number of telephone numbers remaining in the porting database at the end of each quarter 1999 to 2009 in the United States. In the 4th quarter of 2008, there were 97 million telephone numbers remaining in the porting database.
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Federal Communications Commission. (September 30, 2010). Total telephone numbers remaining in the porting database from 1999 to 2009 in the United States (in 1,000) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/
Federal Communications Commission. "Total telephone numbers remaining in the porting database from 1999 to 2009 in the United States (in 1,000)." Chart. September 30, 2010. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/
Federal Communications Commission. (2010). Total telephone numbers remaining in the porting database from 1999 to 2009 in the United States (in 1,000). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/
Federal Communications Commission. "Total Telephone Numbers Remaining in The Porting Database from 1999 to 2009 in The United States (in 1,000)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Sep 2010, /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/
Federal Communications Commission, Total telephone numbers remaining in the porting database from 1999 to 2009 in the United States (in 1,000) ÌÇÐÄÆƽâ°æ, /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/ (last visited July 31, 2026)
Total telephone numbers remaining in the porting database from 1999 to 2009 in the United States (in 1,000) [Graph], Federal Communications Commission, September 30, 2010. [Online]. Available: /statistics/188513/phone-numbers-remaining-in-porting-database-in-the-united-states-since-1999/
