Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days — NPA 571

ONVOY, LLC - VA 1

OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 1

New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2008-11-13	571-485	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2008-10-21	571-256	0–9 XXXwhole prefix which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN08	VA
2008-09-09	571-269	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	WSNGTNZN17	VA
2008-09-09	571-449	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2008-08-18	571-286	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2008-08-18	571-314	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2008-08-18	571-377	0–9 XXXall 10 · 4 holders which blocks →	YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA	367E	MANASSAS	VA
2008-06-24	571-295	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2008-06-18	571-337	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2008-05-29	571-266	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HERNDON	VA
2008-05-13	571-405	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2008-05-13	571-408	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	OCCOQUAN	VA
2008-05-13	571-439	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	LEESBURG	VA
2008-05-13	571-529	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN19	VA
2008-04-15	571-287	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2008-04-10	571-340	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN19	VA
2008-04-09	571-468	0–9 XXXwhole prefix which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN17	VA
2008-03-31	571-315	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	HERNDON	VA
2008-03-26	571-299	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	HERNDON	VA
2008-02-06	571-403	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN08	VA
2008-02-01	571-308	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	WSNGTNZN19	VA
2007-11-30	571-307	0–9 XXXall 10 · 4 holders which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN19	VA
2007-11-07	571-294	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2007-10-29	571-384	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN08	VA
2007-10-29	571-765	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2007-10-09	571-350	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN19	VA
2007-10-02	571-296	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2007-09-04	571-766	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNGTNZN17	VA
2007-08-09	571-297	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	WSNGTNZN17	VA
2007-07-30	571-839	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	WSNGTNZN17	VA
2007-07-03	571-257	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	WSNGTNZN08	VA
2007-04-24	571-268	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	WSNGTNZN17	VA
2007-04-19	571-289	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN08	VA
2007-04-17	571-208	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MANASSAS	VA
2007-03-28	571-282	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	WSNGTNZN17	VA
2007-03-15	571-285	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	DALE CITY	VA
2007-02-23	571-303	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNGTNZN08	VA
2007-02-23	571-490	0–9 XXXall 10 · 6 holders which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN19	VA
2006-12-12	571-730	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2006-11-28	571-480	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN08	VA
2006-11-28	571-482	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN08	VA
2006-11-28	571-483	0–9 XXXall 10 · 6 holders which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN08	VA
2006-11-17	571-374	0–9 XXXall 10 · 7 holders which blocks →	YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA	367E	INDENDNTHL	VA
2006-11-15	571-205	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2006-10-23	571-312	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	WSNGTNZN08	VA
2006-10-23	571-830	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	WSNGTNZN17	VA
2006-10-20	571-918	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	LEESBURG	VA
2006-10-11	571-288	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	DALE CITY	VA
2006-09-21	571-926	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2006-09-20	571-484	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	HERNDON	VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.