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
2014-06-23	438-346	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-06-23	438-347	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-06-23	438-348	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-06-23	530-812	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	MARYSVILLE	CA
2014-06-23	562-521	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	NORWALK	CA
2014-06-23	606-357	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MCDOWELL	KY
2014-06-23	614-924	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	NEW ALBANY	OH
2014-06-23	618-414	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	TROY	IL
2014-06-23	619-493	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	EL CAJON	CA
2014-06-23	619-535	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SNDG SNDG	CA
2014-06-23	705-316	not yet reported which blocks →	Comwave Networks	160G	North Bay	—
2014-06-23	873-270	not yet reported which blocks →	Comwave Networks	160G	Drummondville	—
2014-06-23	873-271	not yet reported which blocks →	Comwave Networks	160G	Shawinigan	—
2014-06-20	646-565	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	NWYRCYZN01	NY
2014-06-20	703-457	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSNGTNZN08	VA
2014-06-20	802-544	0XXX1XXX4XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CONCORD	VT
2014-06-20	818-918	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CANOGAPARK	CA
2014-06-20	909-491	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FONTANA	CA
2014-06-20	910-542	0–9 XXXall 10 · 5 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	LAURINBURG	NC
2014-06-20	912-391	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - GA	067D	HINESVILLE	GA
2014-06-20	916-318	0–9 XXXall 10 · 4 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7174	SCRM MAIN	CA
2014-06-20	949-416	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	LAGUNA BCH	CA
2014-06-20	984-225	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	FUQUAYVRIN	NC
2014-06-20	984-514	0–9 XXXall 10 · 4 holders which blocks →	FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC	440G	OXFORD	NC
2014-06-19	234-712	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	MARLBORO	OH
2014-06-19	234-979	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	MARLBORO	OH
2014-06-19	440-416	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CHAGRINFLS	OH
2014-06-19	440-418	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	BEREA	OH
2014-06-19	440-441	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CHAGRINFLS	OH
2014-06-19	440-450	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	BEREA	OH
2014-06-19	484-501	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	PHPHSBZN30	PA
2014-06-19	541-204	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OR	076F	LEABURG	OR
2014-06-19	614-919	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	HILLIARD	OH
2014-06-19	614-936	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	HILLIARD	OH
2014-06-19	774-478	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	DOVER	MA
2014-06-19	804-593	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	VERIZON VIRGINIA, INC.	9213	RICHMOND	VA
2014-06-19	808-789	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HONOLULU	HI
2014-06-19	813-452	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	TAMPACEN	FL
2014-06-19	818-960	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NORTHRIDGE	CA
2014-06-19	828-307	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks →	ETC COMMUNICATIONS, LLC - NC	403H	SYLVA	NC
2014-06-19	937-928	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	XENIA	OH
2014-06-18	216-505	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CLEVELAND	OH
2014-06-18	219-303	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN	6725	CEDAR LAKE	IN
2014-06-18	224-732	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	WAUCONDA	IL
2014-06-18	302-470	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE	6393	GEORGETOWN	DE
2014-06-18	347-240	0–9 XXXwhole prefix which blocks →	CSC VOICE, LLC	612K	NWYRCYZN06	NY
2014-06-18	431-274	not yet reported which blocks →	MTS Inc.	991B	Split Lake	—
2014-06-18	506-692	not yet reported which blocks →	Aliant Telecom(NB)	8090	Saint John	—
2014-06-18	512-572	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	BERTRAM	TX
2014-06-18	516-442	0–9 XXXall 10 · 4 holders which blocks →	CSC VOICE, LLC	612K	NASSAUZN06	NY

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.