Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
2014-06-18	516-513	0–9 XXXall 10 · 6 holders which blocks →	CSC VOICE, LLC	612K	NASSAUZN08	NY
2014-06-18	615-987	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TN	124F	MURFREESBO	TN
2014-06-18	705-701	not yet reported which blocks →	Fibernetics Corporation	464D	Lindsay	—
2014-06-18	709-741	not yet reported which blocks →	Aliant Telecom (NF)	8085	St. John's	—
2014-06-18	802-569	1XXX8XXX9XXX · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BARTON	VT
2014-06-18	802-830	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MONTPELIER	VT
2014-06-18	971-803	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR	5820	PORTLAND	OR
2014-06-17	210-904	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SANANTONIO	TX
2014-06-17	216-309	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CLEVELAND	OH
2014-06-17	216-507	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CLEVELAND	OH
2014-06-17	248-550	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2014-06-17	316-227	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	NEWTON	KS
2014-06-17	317-763	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IN	105F	WESTFIELD	IN
2014-06-17	343-476	not yet reported which blocks →	ISP Telecom Inc.	4727	Bancroft	—
2014-06-17	352-570	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	YANKEETOWN	FL
2014-06-17	402-503	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - NE	549E	LAUREL	NE
2014-06-17	413-406	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AMHERST	MA
2014-06-17	425-219	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	BOTHELL	WA
2014-06-17	438-403	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2014-06-17	438-404	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2014-06-17	442-246	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	MORONGOVLY	CA
2014-06-17	442-321	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	HOMESTDVLY	CA
2014-06-17	470-339	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	KINGSTON	GA
2014-06-17	484-719	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ALLENTOWN	PA
2014-06-17	505-415	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	ALBUQURQUE	NM
2014-06-17	530-650	0–9 XXXall 10 · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	WOODLAND	CA
2014-06-17	581-328	not yet reported which blocks →	Videotron Ltd.	8306	Armagh	—
2014-06-17	581-332	not yet reported which blocks →	Videotron Ltd.	8306	Saint-Paul-de-Montminy	—
2014-06-17	587-475	not yet reported which blocks →	TELUS	8084	Calgary	—
2014-06-17	587-577	not yet reported which blocks →	TELUS Mobility	8301	Calgary	—
2014-06-17	587-578	not yet reported which blocks →	TELUS Mobility	8301	Calgary	—
2014-06-17	587-579	not yet reported which blocks →	TELUS Mobility	8301	Calgary	—
2014-06-17	587-596	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2014-06-17	587-597	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2014-06-17	747-229	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BRBN BRBN	CA
2014-06-17	778-817	not yet reported which blocks →	ISP Telecom Inc.	4727	Victoria	—
2014-06-17	778-952	not yet reported which blocks →	Bell Mobility	6574	Vancouver	—
2014-06-17	785-521	0–9 XXXall 10 · 6 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	OTTAWA	KS
2014-06-17	913-274	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	OLATHE	KS
2014-06-16	470-616	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	BUCHANAN	GA
2014-06-16	475-277	0–9 XXXall 10 · 8 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	WILTON	CT
2014-06-16	615-813	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TN	124F	CRSPLORLND	TN
2014-06-16	646-854	0–9 XXXall 10 · 2 holders which blocks →	BUSINESS AUTOMATION TECHNOLOGIES, INC. - NY	474F	NWYRCYZN01	NY
2014-06-16	762-278	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	RUTLEDGE	GA
2014-06-16	916-805	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	FOLSOM	CA
2014-06-16	956-503	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	DONNA	TX
2014-06-13	210-952	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SANANTONIO	TX
2014-06-13	317-978	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	CHARLOTSVL	IN
2014-06-13	336-523	0–9 XXXall 10 · 5 holders which blocks →	RANDOLPH TELEPHONE TELECOMMUNICATIONS, INC. - NC	757D	ASHEBORO	NC
2014-06-13	443-809	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	TOWSON	MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.