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
2023-10-12	571-661	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2023-10-12	571-663	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2023-10-09	571-658	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2023-09-12	571-202	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2023-09-12	571-240	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HERNDON	VA
2023-08-31	571-656	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	TRIANGLE	VA
2023-08-31	571-657	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	MANASSAS	VA
2023-08-24	571-624	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN08	VA
2023-08-22	571-654	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - VA	4644	LEESBURG	VA
2023-08-09	571-546	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2023-07-25	571-650	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	ARCOLA	VA
2023-07-25	571-652	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN08	VA
2023-07-25	571-653	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - VA	138E	WSNGTNZN19	VA
2023-07-18	571-648	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2023-07-07	571-647	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2023-05-31	571-640	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - VA	138E	MANASSAS	VA
2023-05-05	571-638	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	HERNDON	VA
2023-04-26	571-637	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNGTNZN08	VA
2023-04-20	571-618	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSNGTNZN17	VA
2023-02-13	571-617	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	732J	LEESBURG	VA
2023-01-19	571-607	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2023-01-19	571-608	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2023-01-19	571-610	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2023-01-19	571-613	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2023-01-19	571-614	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2023-01-11	571-604	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2023-01-11	571-605	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	DALE CITY	VA
2023-01-09	571-597	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	HERNDON	VA
2023-01-09	571-603	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2022-12-07	571-596	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2022-11-15	571-593	0–9 XXXall 10 · 6 holders which blocks →	COMMIO, LLC	939H	LEESBURG	VA
2022-11-09	571-592	0–9 XXXall 10 · 2 holders which blocks →	COMMIO, LLC	939H	OCCOQUAN	VA
2022-11-04	571-590	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	DALE CITY	VA
2022-10-21	571-583	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	BRADDOCK	VA
2022-10-13	571-609	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN19	VA
2022-10-12	571-584	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN17	VA
2022-10-12	571-602	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MANASSAS	VA
2022-10-04	571-582	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	LORTONMTRO	VA
2022-09-13	571-586	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	HERNDON	VA
2022-09-02	571-564	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN19	VA
2022-09-02	571-579	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSNGTNZN08	VA
2022-09-02	571-580	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	OCCOQUAN	VA
2022-09-02	571-751	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - VA	138E	ARCOLA	VA
2022-08-16	571-569	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	MANASSAS	VA
2022-08-12	571-563	0–9 XXXall 10 · 4 holders which blocks →	ONVOY SPECTRUM, LLC	624H	HERNDON	VA
2022-07-22	571-560	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN08	VA
2022-07-22	571-562	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN17	VA
2022-03-31	571-578	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	LEESBURG	VA
2022-03-22	571-548	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2022-03-04	571-626	0–9 XXXall 10 · 5 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	TRIANGLE	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.