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 530

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
2019-03-20	530-799	0–9 XXXall 10 · 7 holders which blocks →	FRACTEL, LLC	965H	MARYSVILLE	CA
2019-02-19	530-608	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	TRUCKEE	CA
2018-11-07	530-499	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PLVL WEST	CA
2018-10-19	530-607	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	WHEATLAND	CA
2018-10-08	530-561	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	ANDERSON	CA
2018-10-04	530-560	0–9 XXXall 10 · 5 holders which blocks →	AIRESPRING, INC.	996H	REDDING	CA
2018-08-09	530-490	0–9 XXXall 10 · 6 holders which blocks →	AIRESPRING, INC.	996H	WOODLAND	CA
2018-05-29	530-460	0–9 XXXall 10 · 5 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	GRVY MAIN	CA
2018-04-05	530-922	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	OROVILLE	CA
2018-03-14	530-829	0XXX1XXX4XXX8XXX9XXX · 5 holders which blocks →	VONAGE AMERICA LLC	197D	CHICO	CA
2018-02-23	530-609	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	EXIANT COMMUNICATIONS LLC	114J	ALLEGHANY	CA
2017-11-14	530-599	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - CA	649C	MARYSVILLE	CA
2017-08-07	530-449	7XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	OAK RUN	CA
2017-08-07	530-849	7XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SHINGLETN	CA
2017-04-06	530-767	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CA	649C	CHICO	CA
2017-03-24	530-630	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	COMMIO, LLC	939H	CHICO	CA
2017-02-10	530-407	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANDERSON	CA
2017-01-26	530-783	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PARADISE	CA
2017-01-16	530-557	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NEVADACITY	CA
2016-12-15	530-399	0–9 XXXall 10 · 6 holders which blocks →	TELNYX LLC	073H	CHICO	CA
2016-06-27	530-807	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	NTAH THCY	CA
2016-06-17	530-806	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	REDDING	CA
2016-06-08	530-551	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANDERSON	CA
2016-03-03	530-317	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	PLVL WEST	CA
2016-02-15	530-805	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	ORLAND	CA
2015-12-21	530-537	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	AUBN MAIN	CA
2015-11-02	530-782	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	REDDING	CA
2015-10-05	530-631	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	WOODLAND	CA
2015-10-05	530-764	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OROVILLE	CA
2015-09-11	530-441	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MARYSVILLE	CA
2015-09-08	530-744	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANDERSON	CA
2015-08-27	530-498	0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	CLFX WEMR	CA
2015-08-04	530-565	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LIVE OAK	CA
2015-07-20	530-395	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	REDDING	CA
2015-06-11	530-854	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	OROVILLE	CA
2015-04-24	530-556	0–9 XXXall 10 · 6 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	SHINGLESPG	CA
2015-03-23	530-443	0–9 XXXall 10 · 6 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	MARYSVILLE	CA
2015-03-13	530-648	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	GRVY MAIN	CA
2014-12-01	530-552	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OROVILLE	CA
2014-11-24	530-786	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	AUBN MAIN	CA
2014-10-17	530-691	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	REDDING	CA
2014-10-14	530-813	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MARYSVILLE	CA
2014-10-13	530-815	0XXX1XXX4XXX5XXX8XXX9XXX · 2 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CHICO	CA
2014-06-30	530-768	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	REDDING	CA
2014-06-23	530-812	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	MARYSVILLE	CA
2014-06-17	530-650	0–9 XXXall 10 · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	WOODLAND	CA
2014-02-11	530-446	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	CSC VOICE, LLC	612K	GRVY MAIN	CA
2014-02-11	530-489	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	CSC VOICE, LLC	612K	HOMEWOOD	CA
2014-02-11	530-492	0–9 XXXall 10 · 6 holders which blocks →	CSC VOICE, LLC	612K	AUBN MAIN	CA
2014-02-11	530-728	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	CSC VOICE, LLC	612K	GRVY SOUTH	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.