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
2013-03-18	607-399	0–9 XXXall 10 · 5 holders which blocks →	SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NY	932G	HARPURSVL	NY
2013-03-18	607-499	0XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks →	SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NY	932G	WINDSOR	NY
2013-03-18	702-843	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	LAS VEGAS	NV
2013-03-18	707-368	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	LEGGETT	CA
2013-03-18	719-299	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	PUEBLO	CO
2013-03-18	775-409	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	RENO	NV
2013-03-18	909-990	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	RIALTO	CA
2013-03-18	918-954	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	TULSA	OK
2013-03-18	949-526	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	IRVINE	CA
2013-03-18	949-556	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	IRVINE	CA
2013-03-16	616-253	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLCV - MI	543C	MOLINE	MI
2013-03-15	202-770	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - DC	074F	WSHNGTNZN1	DC
2013-03-15	289-918	not yet reported which blocks →	Distributel	082E	Oshawa	—
2013-03-15	316-302	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	WICHITA	KS
2013-03-15	334-547	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	DOTHAN	AL
2013-03-15	469-435	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-03-15	469-515	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-03-15	469-516	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-03-15	469-520	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-03-15	469-540	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-03-15	657-667	0–9 XXXall 10 · 7 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	GARDEN GRV	CA
2013-03-15	705-449	not yet reported which blocks →	Distributel	082E	Sudbury	—
2013-03-15	720-580	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	KEENESBURG	CO
2013-03-15	785-414	0–9 XXXall 10 · 9 holders which blocks →	NUSO, LLC	551G	TOPEKA	KS
2013-03-15	816-266	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	KANSASCITY	MO
2013-03-15	863-417	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF FLORIDA, LLC - FL	902E	FROSTPROOF	FL
2013-03-15	919-907	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - NC	8389	DURHAM	NC
2013-03-15	928-298	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PIMA	AZ
2013-03-15	929-227	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	NWYRCYZN03	NY
2013-03-14	217-610	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NUSO, LLC	551G	SPRINGFLD	IL
2013-03-14	480-589	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2013-03-14	480-622	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2013-03-14	520-268	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TUCSON	AZ
2013-03-14	863-337	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF FLORIDA, LLC - FL	902E	LAKELAND	FL
2013-03-13	309-209	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	NUSO, LLC	551G	MACOMB	IL
2013-03-13	309-307	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	NUSO, LLC	551G	BLOOMINGTN	IL
2013-03-13	309-308	0–9 XXXall 10 · 2 holders which blocks →	NUSO, LLC	551G	PEORIA	IL
2013-03-13	365-266	not yet reported which blocks →	Comwave Networks	160G	Bradford	—
2013-03-13	365-540	not yet reported which blocks →	Comwave Networks	160G	Tottenham	—
2013-03-13	437-836	not yet reported which blocks →	Zayo Canada Inc.	8304	Toronto	—
2013-03-13	469-510	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2013-03-13	515-357	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	AMES	IA
2013-03-13	563-316	0–9 XXXall 10 · 7 holders which blocks →	CS TECHNOLOGIES, INC. - IA	204A	MUSCATINE	IA
2013-03-13	618-605	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	CARBONDALE	IL
2013-03-13	705-467	not yet reported which blocks →	Comwave Networks	160G	Collingwood	—
2013-03-13	705-502	not yet reported which blocks →	Comwave Networks	160G	Alliston	—
2013-03-13	705-714	not yet reported which blocks →	Comwave Networks	160G	Brechin	—
2013-03-13	705-916	not yet reported which blocks →	Comwave Networks	160G	Cookstown	—
2013-03-13	779-212	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	DE KALB	IL
2013-03-13	815-491	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	ROCKFORD	IL

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.