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 442

NEW CINGULAR WIRELESS PCS, LLC 1

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 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
2020-04-24	442-339	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	OCSD CRLS	CA
2020-04-23	442-529	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	INDIO	CA
2020-03-18	442-316	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VTVL HSPR	CA
2020-02-13	442-315	0–9 XXXall 10 · 2 holders which blocks →	CSC WIRELESS, LLC	425J	PALM SPG	CA
2020-02-10	442-314	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VICTORVL	CA
2020-02-10	442-337	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VICTORVL	CA
2020-02-10	442-350	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ESCONDIDO	CA
2020-02-10	442-380	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VICTORVL	CA
2020-01-10	442-307	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	INDIO	CA
2019-11-15	442-313	0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	ONVOY, LLC - CA	649C	HAVASULAKE	CA
2019-11-14	442-440	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - CA	649C	LENWOOD	CA
2019-11-14	442-441	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CA	649C	BRSW YERM	CA
2019-11-14	442-443	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - CA	649C	MORONGOVLY	CA
2019-10-02	442-312	0XXX1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	PINE CREEK	CA
2019-08-07	442-309	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	BARSTOW	CA
2019-03-26	442-308	2XXX which blocks →	CSC WIRELESS, LLC	425J	JUNE LAKE	CA
2019-03-20	442-336	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	VTVL APVY	CA
2019-03-20	442-348	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	VICTORVL	CA
2019-03-19	442-306	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	INDIO	CA
2019-03-07	442-305	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	PALMDESERT	CA
2018-10-22	442-304	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - CA	649C	EAGLE MT	CA
2018-10-15	442-303	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	OCSD CRLS	CA
2018-09-27	442-302	0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	LUCERNEVLY	CA
2018-07-31	442-299	not yet reported which blocks →	SHELCOMM	0051	VTVL HSPR	CA
2018-06-13	442-290	0–9 XXXall 10 · 4 holders which blocks →	VONAGE AMERICA LLC	197D	PALM SPG	CA
2018-05-08	442-289	not yet reported which blocks →	SHELCOMM	0051	VICTORVL	CA
2018-04-24	442-288	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OCSD PDTN	CA
2018-04-11	442-280	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BARSTOW	CA
2018-04-09	442-382	0–9 XXXall 10 · 7 holders which blocks →	METROPCS NETWORKS, LLC	899D	VTVL HSPR	CA
2018-03-29	442-279	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	BRAWLEY	CA
2018-01-26	442-484	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	INDIO	CA
2017-12-22	442-277	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - CA	649C	ESCONDIDO	CA
2017-12-21	442-363	0–9 XXXall 10 · 5 holders which blocks →	FRONTIER CALIFORNIA INC.	4420	VTVL ADLN	CA
2017-09-20	442-270	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	EL CENTRO	CA
2017-06-15	442-250	0–9 XXXall 10 · 3 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CALEXICO	CA
2017-06-15	442-266	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	OCSD OCSD	CA
2017-06-08	442-219	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	VICTORVL	CA
2017-05-10	442-334	0–9 XXXall 10 · 7 holders which blocks →	TELNYX LLC	073H	PALMDESERT	CA
2017-03-29	442-218	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	LKISABELLA	CA
2017-03-27	442-292	0–9 XXXall 10 · 7 holders which blocks →	UTILITY TELECOM GROUP, LLC - CA	9262	VTVL APVY	CA
2017-03-24	442-217	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	VALLEY CTR	CA
2016-12-15	442-515	0–9 XXXall 10 · 6 holders which blocks →	TELNYX LLC	073H	SAN MARCOS	CA
2016-12-13	442-215	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	INDIO	CA
2016-12-13	442-216	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	VISTA	CA
2016-12-02	442-212	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	PALM SPG	CA
2016-11-18	442-936	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	WRWD PHLN	CA
2016-10-28	442-296	0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	CROWLEY LK	CA
2016-10-28	442-298	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	TRONA	CA
2016-10-11	442-210	0XXX1XXX2XXX3XXX7XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BIG PINE	CA
2016-10-10	442-230	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BRAWLEY	CA

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.