Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2005-03-11	410-858	0–9 XXXall 10 · 4 holders which blocks →	VERIZON MARYLAND, INC.	9212	ANNAPOLIS	MD
2005-03-11	450-607	not yet reported which blocks →	Videotron Ltd.	8306	Crabtree	—
2005-03-11	450-608	not yet reported which blocks →	Videotron Ltd.	8306	Lavaltrie	—
2005-03-11	450-952	not yet reported which blocks →	Videotron Ltd.	8306	Ste-Julienne	—
2005-03-11	450-953	not yet reported which blocks →	Videotron Ltd.	8306	St-Jacques	—
2005-03-11	973-459	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	NEWTON	NJ
2005-03-10	334-709	0–9 XXXall 10 · 7 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	DALEVILLE	AL
2005-03-10	337-244	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA	6505	LK CHARLES	LA
2005-03-10	347-689	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN06	NY
2005-03-10	601-840	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	ENTERPRISE	MS
2005-03-10	601-962	3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	LAKE	MS
2005-03-10	631-707	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BRENTWOOD	NY
2005-03-10	631-747	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BRENTWOOD	NY
2005-03-10	646-660	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN01	NY
2005-03-10	919-504	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	GOLDSTON	NC
2005-03-10	919-769	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	BONLEE	NC
2005-03-10	971-533	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	PORTLAND	OR
2005-03-09	201-504	0–9 XXXwhole prefix which blocks →	COOPERATIVE COMMUNICATIONS, INC.	8407	RUTHERFORD	NJ
2005-03-09	209-373	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	STOCKTON	CA
2005-03-09	214-862	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-03-09	320-469	0–9 XXXall 10 · 2 holders which blocks →	WORLDCELL SOLUTIONS LLC	434F	ST CLOUD	MN
2005-03-09	334-621	1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	CLAYTON	AL
2005-03-09	352-678	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BROOKSVL	FL
2005-03-09	407-574	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	ORLANDO	FL
2005-03-09	450-594	not yet reported which blocks →	Videotron Ltd.	8306	Mirabel-Ste-Scholastique	—
2005-03-09	505-210	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ABIQUIU	NM
2005-03-09	540-451	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WAYNESBORO	VA
2005-03-09	559-577	0–9 XXXall 10 · 2 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	FRESNO	CA
2005-03-09	561-537	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	WPALMBEACH	FL
2005-03-09	772-924	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PTST LUCIE	FL
2005-03-09	806-393	2XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EARTH	TX
2005-03-09	806-566	2XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	NEEDMORE	TX
2005-03-09	806-987	1XXX3XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FRIONA	TX
2005-03-09	813-401	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TAMPA	FL
2005-03-09	819-240	not yet reported which blocks →	Videotron Ltd.	8306	Deauville	—
2005-03-09	819-251	not yet reported which blocks →	Videotron Ltd.	8306	East Angus	—
2005-03-09	819-258	not yet reported which blocks →	Videotron Ltd.	8306	Stoke	—
2005-03-09	819-541	not yet reported which blocks →	Videotron Ltd.	8306	Bromptonville	—
2005-03-09	832-622	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2005-03-09	903-516	4XXX5XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	NECHES	TX
2005-03-09	916-273	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SCRM MAIN	CA
2005-03-09	939-205	1XXX5XXX which blocks →	NEUTRAL TANDEM - PR	559F	PUEBLOVIEJ	PR
2005-03-08	252-665	6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	HAVELOCK	NC
2005-03-08	309-731	0XXX1XXX4XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	MACOMB	IL
2005-03-08	319-355	0–9 XXXwhole prefix which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
2005-03-08	336-525	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	SAXAPAHAW	NC
2005-03-08	336-844	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	NOWILKESBO	NC
2005-03-08	505-419	6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	AZTEC	NM
2005-03-08	585-469	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	ROCHESTER	NY
2005-03-08	662-770	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	KOSCIUSKO	MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.