Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19

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
2020-05-20	223-500	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	JEFFERSON	PA
2020-05-20	223-600	0XXX1XXX4XXX5XXX6XXX · 3 holders which blocks →	FRACTEL, LLC	965H	LIVERPOOL	PA
2020-05-20	223-766	0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	MERCERSBG	PA
2020-05-20	234-274	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	AKRON	OH
2020-05-20	343-891	not yet reported which blocks →	ISP Telecom Inc.	4727	Casselman	—
2020-05-20	365-896	not yet reported which blocks →	ISP Telecom Inc.	4727	Brooklin	—
2020-05-20	365-897	not yet reported which blocks →	ISP Telecom Inc.	4727	Orono	—
2020-05-20	365-907	not yet reported which blocks →	ISP Telecom Inc.	4727	Fisherville	—
2020-05-20	365-908	not yet reported which blocks →	ISP Telecom Inc.	4727	Selkirk	—
2020-05-20	531-241	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - NE	7144	OMAHA	NE
2020-05-20	548-875	not yet reported which blocks →	ISP Telecom Inc.	4727	Leamington	—
2020-05-20	548-876	not yet reported which blocks →	ISP Telecom Inc.	4727	Tecumseh	—
2020-05-20	567-304	0–9 XXXall 10 · 6 holders which blocks →	CSC WIRELESS, LLC	425J	TOLEDO	OH
2020-05-20	567-306	0–9 XXXall 10 · 2 holders which blocks →	CSC WIRELESS, LLC	425J	MANSFIELD	OH
2020-05-20	580-844	0XXX5XXX8XXX9XXX · 2 holders which blocks →	TERRA NOVA TELECOM INC.	145J	HITCHCOCK	OK
2020-05-20	682-900	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	FORT WORTH	TX
2020-05-20	731-877	0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks →	TERRA NOVA TELECOM INC.	145J	GLEASON	TN
2020-05-20	743-209	0–9 XXXall 10 · 4 holders which blocks →	CSC WIRELESS, LLC	425J	GREENSBORO	NC
2020-05-20	828-220	0–9 XXXall 10 · 5 holders which blocks →	CSC WIRELESS, LLC	425J	ASHEVILLE	NC
2020-05-20	865-855	0–9 XXXall 10 · 4 holders which blocks →	TERRA NOVA TELECOM INC.	145J	CLINTON	TN
2020-05-20	910-756	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	WILMINGTON	NC
2020-05-20	910-806	0–9 XXXall 10 · 7 holders which blocks →	CSC WIRELESS, LLC	425J	FAYETTEVL	NC
2020-05-20	937-784	0–9 XXXall 10 · 2 holders which blocks →	CSC WIRELESS, LLC	425J	DAYTON	OH
2020-05-20	954-751	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	POMPANOBCH	FL
2020-05-20	980-316	0–9 XXXall 10 · 5 holders which blocks →	CSC WIRELESS, LLC	425J	CHARLOTTE	NC
2020-05-19	202-451	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSHNGTNZN1	DC
2020-05-19	249-897	not yet reported which blocks →	ISP Telecom Inc.	4727	Chapleau	—
2020-05-19	249-898	not yet reported which blocks →	ISP Telecom Inc.	4727	Spanish	—
2020-05-19	343-890	not yet reported which blocks →	ISP Telecom Inc.	4727	Almonte	—
2020-05-19	438-475	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2020-05-19	469-830	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	LEWISVILLE	TX
2020-05-19	479-386	0XXX1XXX6XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR	6805	DECATUR	AR
2020-05-19	548-722	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Waterford	—
2020-05-19	548-878	not yet reported which blocks →	ISP Telecom Inc.	4727	Wallaceburg	—
2020-05-19	561-492	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	BOCA RATON	FL
2020-05-19	661-499	0–9 XXXall 10 · 4 holders which blocks →	AIRESPRING, INC.	996H	LANCASTER	CA
2020-05-19	669-301	0–9 XXXall 10 · 6 holders which blocks →	VONAGE AMERICA LLC	197D	SNJS SOUTH	CA
2020-05-19	747-293	0–9 XXXall 10 · 5 holders which blocks →	VONAGE AMERICA LLC	197D	CANOGAPARK	CA
2020-05-19	929-545	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN07	NY
2020-05-19	949-210	0–9 XXXall 10 · 2 holders which blocks →	VONAGE AMERICA LLC	197D	SADLBK VLY	CA
2020-05-18	208-370	0–9 XXXall 10 · 6 holders which blocks →	CTC TELECOM, INC.	4032	BOISE	ID
2020-05-18	272-243	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - PA	002F	ORWIGSBURG	PA
2020-05-18	480-691	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2020-05-18	540-730	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TELNYX LLC	073H	KEEZLETOWN	VA
2020-05-18	571-517	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - VA	138E	DULLES	VA
2020-05-18	763-330	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MN	980E	TWINCITIES	MN
2020-05-18	785-306	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS	6532	ST FRANCIS	KS
2020-05-18	810-246	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAPEER	MI
2020-05-18	872-264	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN01	IL
2020-05-18	910-761	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NC	998E	WRGHTSVBCH	NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.