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
2013-01-11	440-713	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	BRECKSVL	OH
2013-01-11	480-521	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2013-01-11	480-599	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2013-01-11	480-815	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2013-01-11	520-286	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	TUCSON	AZ
2013-01-11	520-345	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TUCSON	AZ
2013-01-11	520-427	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	TUCSON	AZ
2013-01-11	586-289	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2013-01-11	612-351	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - MN	184D	TWINCITIES	MN
2013-01-11	615-802	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TN	124F	PORTLAND	TN
2013-01-11	709-771	not yet reported which blocks →	TELUS Mobility	8303	St. John's	—
2013-01-11	830-212	0–9 XXXall 10 · 6 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	DEL RIO	TX
2013-01-11	832-786	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	HOUSTON	TX
2013-01-11	832-908	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2013-01-11	832-916	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2013-01-10	305-615	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	KEYS	FL
2013-01-10	414-585	0–9 XXXall 10 · 3 holders which blocks →	WISCONSIN BELL INC	9327	MILWAUKZN1	WI
2013-01-10	614-773	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	HILLIARD	OH
2013-01-10	614-952	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	HILLIARD	OH
2013-01-10	651-401	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN	7783	NORTH BRCH	MN
2013-01-10	678-515	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ATLANTA	GA
2013-01-10	786-563	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	NORTH DADE	FL
2013-01-10	813-509	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TAMPACEN	FL
2013-01-10	813-702	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	ZEPHYRHILS	FL
2013-01-10	936-213	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	WALLER	TX
2013-01-09	217-441	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC	224C	SPRINGFLD	IL
2013-01-09	217-600	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	CHAMPAURBN	IL
2013-01-09	336-814	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NC	638E	GREENSBORO	NC
2013-01-09	408-709	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNJS WEST	CA
2013-01-09	437-888	not yet reported which blocks →	Fibernetics Corporation	464D	Toronto	—
2013-01-09	478-292	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - GA	067D	MACON	GA
2013-01-09	541-630	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR	5820	CENTRAL PT	OR
2013-01-09	581-648	not yet reported which blocks →	Videotron Ltd.	8306	L'Ile-Verte	—
2013-01-09	717-963	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - PA	547E	HARISBGZN1	PA
2013-01-09	762-585	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - GA	067D	AUGUSTA	GA
2013-01-09	778-445	not yet reported which blocks →	Shaw Telecom Inc.	497E	Victoria	—
2013-01-09	803-801	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	WINNSBORO	SC
2013-01-09	843-802	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HILTONHEAD	SC
2013-01-09	901-228	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	MEMPHIS	TN
2013-01-09	912-421	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - GA	067D	SAVANNAH	GA
2013-01-08	305-602	0–9 XXXwhole prefix which blocks →	PEERLESS NETWORK OF FLORIDA, LLC - FL	902E	KEYS	FL
2013-01-08	351-206	0XXX1XXX2XXX4XXX5XXX9XXX · 2 holders which blocks →	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	ROCKPORT	MA
2013-01-08	614-912	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	GROVEPORT	OH
2013-01-08	614-941	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	GROVEPORT	OH
2013-01-08	774-336	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	BREWSTER	MA
2013-01-08	908-308	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BELLE MEAD	NJ
2013-01-07	226-667	not yet reported which blocks →	Fibernetics Corporation	464D	London	—
2013-01-07	289-408	not yet reported which blocks →	Fibernetics Corporation	464D	Hamilton	—
2013-01-07	289-859	not yet reported which blocks →	Fibernetics Corporation	464D	Markham	—
2013-01-07	343-887	not yet reported which blocks →	Fibernetics Corporation	464D	Ottawa-Hull	—

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.