Recent prefix assignments

3 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 820

ONVOY, LLC - CA 2

NEW CINGULAR WIRELESS PCS, 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
2026-09-17	820-252	0XXX which blocks →	ONVOY, LLC - CA	649C	ARROYOGRND	CA
2026-08-27	820-251	0XXX which blocks →	ONVOY, LLC - CA	649C	PASOROBLES	CA
2026-08-26	820-250	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OJAI	CA
2026-08-20	820-249	0XXX1XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	VNTRA CNTL	CA
2026-07-24	820-248	0XXX1XXX2XXX3XXX9XXX · 2 holders which blocks →	ONVOY, LLC - CA	649C	SANTAMARIA	CA
2026-06-05	820-820	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	OPENTACT INC.	824J	SANBARBARA	CA
2026-05-20	820-880	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	8X8, INC.	193E	SANBARBARA	CA
2026-02-18	820-247	0XXX1XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - CA	649C	NEWBURYPRK	CA
2025-11-06	820-246	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ATASCADERO	CA
2025-10-30	820-245	0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SANTAPAULA	CA
2025-10-03	820-244	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CA	649C	SANTAMARIA	CA
2025-10-02	820-243	0XXX8XXX9XXX which blocks →	ONVOY, LLC - CA	649C	CAMARILLO	CA
2025-09-18	820-242	0XXX2XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - CA	649C	EL RIO	CA
2025-04-25	820-241	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	ATASCADERO	CA
2025-02-12	820-240	0–9 XXXall 10 · 3 holders which blocks →	WAVENATION, LLC	700J	SANBARBARA	CA
2025-01-06	820-239	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NEWBURYPRK	CA
2024-12-30	820-238	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CAMARILLO	CA
2024-12-16	820-237	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ATASCADERO	CA
2024-11-13	820-236	0–9 XXXall 10 · 2 holders which blocks →	NUSO, LLC	478J	SANBARBARA	CA
2024-11-07	820-235	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	VNTRA CNTL	CA
2024-09-23	820-233	0XXX9XXX · 2 holders which blocks →	LEAP TELECOM, LLC	616J	SNLUSOBSPO	CA
2024-09-17	820-232	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	NEWBURYPRK	CA
2024-09-12	820-231	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CAMARILLO	CA
2024-08-27	820-229	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SANBARBARA	CA
2024-08-27	820-230	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PASOROBLES	CA
2024-07-05	820-228	0–9 XXXall 10 · 5 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	LOMPOC	CA
2024-06-13	820-998	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	ATASCADERO	CA
2024-03-29	820-227	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTAMARIA	CA
2024-03-21	820-226	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	EL RIO	CA
2024-01-11	820-225	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	GUADALUPE	CA
2023-12-29	820-224	0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks →	COMMIO, LLC	939H	NIPOMO	CA
2023-12-07	820-223	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANBARBARA	CA
2023-12-05	820-502	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	SIMIVALLEY	CA
2023-10-26	820-221	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SANTAMARIA	CA
2023-08-11	820-219	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	CONEJO	CA
2023-08-11	820-220	0XXX1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks →	COMMIO, LLC	939H	PIRU	CA
2023-07-20	820-218	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LOMPOC	CA
2023-06-06	820-217	0–9 XXXall 10 · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	ATASCADERO	CA
2023-05-16	820-216	0–9 XXXall 10 · 5 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	ARROYOGRND	CA
2023-05-04	820-214	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NEWBURYPRK	CA
2023-05-04	820-215	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NEWBURYPRK	CA
2023-05-01	820-210	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CAMARILLO	CA
2023-05-01	820-213	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CAMARILLO	CA
2023-04-12	820-850	0XXX1XXX8XXX9XXX · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	FILLMORE	CA
2023-01-31	820-823	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	SANTA YNEZ	CA
2022-11-18	820-380	0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	PISMOBEACH	CA
2022-06-29	820-208	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	ATASCADERO	CA
2022-06-01	820-212	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VNTRA EAST	CA
2022-05-31	820-386	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	SIMIVALLEY	CA
2022-02-23	820-799	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	CAMARILLO	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.