Form 502 Filers
As of 12/31/05 (ZIP)
As of 6/30/05 (ZIP)
As of 12/31/04 (ZIP)
As of 6/30/04 (ZIP)
As of 12/31/03 (ZIP)
As of 6/30/03 (ZIP)
Rate Center Data
As of 12/31/05 (ZIP)
As of 6/30/05 (ZIP)
As of 12/31/04 (ZIP)
As of 6/30/04 (ZIP)
As of 12/31/03 (ZIP)
As of 6/30/03 (ZIP)
Thousands Blocks Data
As of 7/10/06 (ZIP)
As of 10/17/05 (ZIP)
As of 4/28/05 (ZIP)
As of 10/15/04 (ZIP)
As of 4/4/04 (ZIP)
As of 10/28/03 (ZIP)
Additional Information
Metropolitan Statistical Areas (MSAs) and corresponding rate centers (ZIP). Rate center names are as they appear in the January 2001 Local Exchange Routing Guide. Posted 3/01.
Long Distance Carrier Code Assignment Data provide historical information on carrier identification codes (CICs), 500 and 900 service code assignments and the number of toll-free numbers (800 and 888).
1st Quarter 1997 (Released 6/97): Report (PDF) / Data (ZIP)
4th Quarter 1994: Data includes a state-by-state listing of carriers purchasing equal access (ZIP).
Central Office Code Usage Report (ZIP). Released 07/93.