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 925

ONVOY, LLC - CA 2

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
2026-09-14	925-601	0XXX which blocks →	ONVOY, LLC - CA	649C	PSBG WEST	CA
2026-08-27	925-591	0XXX1XXX2XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	LIVERMORE	CA
2026-08-20	925-651	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	WALNUT CRK	CA
2026-07-30	925-840	0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CA	649C	ANTIOCH	CA
2026-07-21	925-653	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - CA	649C	CONCORD	CA
2026-06-26	925-582	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	DUBLN-SNRM	CA
2026-05-21	925-607	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	ANTIOCH	CA
2026-05-08	925-638	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	MARTINEZ	CA
2026-01-07	925-559	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ECONTRCOST	CA
2026-01-06	925-554	0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2026-01-05	925-547	0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	PITTSBURG	CA
2025-06-25	925-545	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2025-04-09	925-544	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANTIOCH	CA
2024-11-20	925-540	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DANVILLE	CA
2024-09-12	925-541	not yet reported which blocks →	SHELCOMM	0051	LIVERMORE	CA
2024-06-21	925-539	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2024-04-29	925-486	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	DANVILLE	CA
2024-01-19	925-538	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2024-01-04	925-995	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	CONCORD	CA
2023-11-27	925-531	0XXX9XXX · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	LAFAYETTE	CA
2023-10-06	925-514	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MARTINEZ	CA
2023-10-02	925-220	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PITTSBURG	CA
2023-10-02	925-419	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	CONCORD	CA
2023-10-02	925-491	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	ANTIOCH	CA
2023-10-02	925-512	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CA	649C	WALNUT CRK	CA
2023-08-16	925-205	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	DANVILLE	CA
2023-03-31	925-508	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	ECONTRCOST	CA
2023-01-19	925-506	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2023-01-04	925-507	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CONCORD	CA
2022-12-16	925-504	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PSBG WEST	CA
2022-09-27	925-925	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CA	649C	CONCORD	CA
2022-07-28	925-505	0–9 XXXall 10 · 5 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	LIVERMORE	CA
2022-07-21	925-502	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DANVILLE	CA
2022-06-29	925-441	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	ANTIOCH	CA
2022-06-23	925-590	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	BSHP RNCH	CA
2022-05-17	925-501	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2022-01-31	925-832	0–9 XXXall 10 · 5 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	ECONTRCOST	CA
2022-01-14	925-537	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	LIVERMORE	CA
2022-01-07	925-546	0–9 XXXall 10 · 5 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	WALNUT CRK	CA
2021-12-23	925-496	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	CONCORD	CA
2021-09-29	925-834	0–9 XXXall 10 · 3 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	ANTIOCH	CA
2021-09-24	925-492	0–9 XXXall 10 · 5 holders which blocks →	COMMIO, LLC	939H	PITTSBURG	CA
2021-09-17	925-897	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	DUBLN-SNRM	CA
2021-08-05	925-633	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	CONCORD	CA
2021-08-05	925-733	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	DANVILLE	CA
2021-07-13	925-644	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	CONCORD	CA
2021-07-13	925-880	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	ECONTRCOST	CA
2021-07-07	925-722	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	WALNUT CRK	CA
2021-04-18	925-966	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	ANTIOCH	CA
2021-04-05	925-445	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA

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.