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
2020-05-26	567-557	0XXX1XXX2XXX3XXX5XXX7XXX · 2 holders which blocks →	ONVOY, LLC - OH	464C	MILAN	OH
2020-05-26	567-587	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - OH	464C	MTBLANCHAD	OH
2020-05-26	712-666	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	SIOUX CITY	IA
2020-05-26	830-356	0–9 XXXall 10 · 3 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	DEL RIO	TX
2020-05-26	873-891	not yet reported which blocks →	ISP Telecom Inc.	4727	Louiseville	—
2020-05-26	873-892	not yet reported which blocks →	ISP Telecom Inc.	4727	Laurierville	—
2020-05-26	873-893	not yet reported which blocks →	ISP Telecom Inc.	4727	Plessisville	—
2020-05-26	873-897	not yet reported which blocks →	ISP Telecom Inc.	4727	Asbestos	—
2020-05-26	873-898	not yet reported which blocks →	ISP Telecom Inc.	4727	Danville	—
2020-05-26	910-680	0XXX which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ABBOTTSBG	NC
2020-05-26	984-258	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	BROADWAY	NC
2020-05-25	226-631	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Harrow	—
2020-05-25	226-634	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Kingsville	—
2020-05-25	226-635	not yet reported which blocks →	TekSavvy Solutions Inc	548H	La Salle	—
2020-05-25	226-638	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Leamington	—
2020-05-25	226-643	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Maidstone	—
2020-05-25	226-645	not yet reported which blocks →	TekSavvy Solutions Inc	548H	McGregor	—
2020-05-25	226-679	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Pelee Island	—
2020-05-25	226-685	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Pleasant Park	—
2020-05-25	226-689	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Stoney Point	—
2020-05-22	202-940	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	WSHNGTNZN1	DC
2020-05-22	209-699	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	TRACY	CA
2020-05-22	213-722	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	LSAN DA 05	CA
2020-05-22	226-621	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Amherstburg	—
2020-05-22	226-624	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Belle River	—
2020-05-22	226-625	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Comber	—
2020-05-22	226-628	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Emeryville	—
2020-05-22	226-629	not yet reported which blocks →	TekSavvy Solutions Inc	548H	Essex	—
2020-05-22	551-600	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	WYCKOFF	NJ
2020-05-22	579-444	not yet reported which blocks →	Cooptel	818D	St-Gabriel-de-Brandon	—
2020-05-22	579-454	not yet reported which blocks →	Cooptel	818D	St-Zenon	—
2020-05-21	207-531	0–9 XXXall 10 · 6 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	LEWISTON	ME
2020-05-21	307-285	0–9 XXXall 10 · 5 holders which blocks →	AIRUS, INC. - WY	581H	BUFFALO	WY
2020-05-21	360-360	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WA	483E	VANCOUVER	WA
2020-05-21	414-260	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	478J	MILWAUKZN1	WI
2020-05-21	531-243	4XXX5XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BRUNING	NE
2020-05-21	573-540	0–9 XXXall 10 · 6 holders which blocks →	CSC WIRELESS, LLC	425J	COLUMBIA	MO
2020-05-21	579-889	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Blaise	—
2020-05-21	579-890	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Zenon	—
2020-05-21	579-891	not yet reported which blocks →	ISP Telecom Inc.	4727	Yamaska	—
2020-05-21	579-892	not yet reported which blocks →	ISP Telecom Inc.	4727	Actonvale	—
2020-05-21	605-316	0–9 XXXall 10 · 5 holders which blocks →	AIRUS, INC. - SD	580H	IROQUOIS	SD
2020-05-21	629-877	0XXX1XXX4XXX5XXX · 4 holders which blocks →	TERRA NOVA TELECOM INC.	145J	TRIUNE	TN
2020-05-21	762-251	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ELBERTON	GA
2020-05-21	873-879	not yet reported which blocks →	ISP Telecom Inc.	4727	Chelsea	—
2020-05-20	207-816	0–9 XXXall 10 · 6 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	AUGUSTA	ME
2020-05-20	216-329	0–9 XXXall 10 · 2 holders which blocks →	CSC WIRELESS, LLC	425J	CLEVELAND	OH
2020-05-20	223-300	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	BROGUE	PA
2020-05-20	223-345	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	CHAMBERSBG	PA
2020-05-20	223-356	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	INTERCOURS	PA

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.