Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
2016-06-09	571-260	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	DALE CITY	VA
2016-05-09	571-549	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	BRADDOCK	VA
2016-04-04	571-320	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	TRIANGLE	VA
2016-02-08	571-459	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN19	VA
2016-01-12	571-373	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2016-01-12	571-778	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	MANASSAS	VA
2016-01-11	571-775	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN08	VA
2015-11-19	571-200	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN08	VA
2015-11-18	571-552	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	DALE CITY	VA
2015-09-22	571-525	0–9 XXXall 10 · 7 holders which blocks →	AIRUS, INC. - VA	726H	HERNDON	VA
2015-09-22	571-565	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2015-09-17	571-472	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN17	VA
2015-09-15	571-474	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2015-08-25	571-352	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HERNDON	VA
2015-08-25	571-466	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	TRIANGLE	VA
2015-08-25	571-639	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ARCOLA	VA
2015-08-13	571-444	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN08	VA
2015-08-12	571-800	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN08	VA
2015-06-10	571-363	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN19	VA
2015-03-27	571-486	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HAYMARKET	VA
2015-03-13	571-570	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN17	VA
2015-03-10	571-665	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HERNDON	VA
2015-03-09	571-365	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	BRADDOCK	VA
2015-02-17	571-999	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN17	VA
2015-01-23	571-635	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2015-01-06	571-342	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2014-12-11	571-707	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	LEESBURG	VA
2014-11-25	571-789	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2014-11-18	571-992	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2014-11-13	571-524	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HERNDON	VA
2014-11-06	571-585	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN19	VA
2014-10-24	571-589	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	DALE CITY	VA
2014-10-14	571-489	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2014-10-14	571-645	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN08	VA
2014-09-25	571-349	0–9 XXXall 10 · 8 holders which blocks →	VERIZON SOUTH, INC. - VA (CONTEL)	0233	ARCOLA	VA
2014-09-12	571-598	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	MANASSAS	VA
2014-09-12	571-719	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	MANASSAS	VA
2014-08-12	571-599	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2014-08-08	571-446	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	HERNDON	VA
2014-07-01	571-351	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN08	VA
2014-04-17	571-290	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN08	VA
2014-04-15	571-919	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	LEESBURG	VA
2014-04-10	571-510	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	LEESBURG	VA
2014-01-28	571-304	0–9 XXXwhole prefix which blocks →	VERIZON VIRGINIA, INC.	9213	HERNDON	VA
2013-12-18	571-888	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF VIRGINIA, LLC - VA	275G	DULLES	VA
2013-12-13	571-325	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HERNDON	VA
2013-12-13	571-343	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	OCCOQUAN	VA
2013-11-26	571-452	0–9 XXXwhole prefix which blocks →	VERIZON VIRGINIA, INC.	9213	WSNGTNZN08	VA
2013-10-24	571-279	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2013-08-29	571-284	0–9 XXXall 10 · 3 holders which blocks →	VERIZON SOUTH, INC. - VA (CONTEL)	0233	HAYMARKET	VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.