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
2016-09-02	804-369	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - VA	138E	LIVELY	VA
2016-09-02	804-374	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - VA	138E	MANAKIN	VA
2016-09-02	804-376	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - VA	138E	POWHATAN	VA
2016-09-02	804-390	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - VA	138E	CALLAO	VA
2016-09-02	804-391	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - VA	138E	COLONILBCH	VA
2016-09-02	804-392	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	ENON	VA
2016-09-02	804-395	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - VA	138E	FARNHAM	VA
2016-09-02	804-468	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - VA	138E	HAGUE	VA
2016-09-02	804-568	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - VA	138E	MATHEWS	VA
2016-09-02	915-283	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EL PASO	TX
2016-09-02	929-379	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	NWYRCYZN06	NY
2016-09-02	929-380	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	NWYRCYZN09	NY
2016-09-02	929-388	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	NWYRCYZN04	NY
2016-09-02	970-652	0–9 XXXall 10 · 3 holders which blocks →	QWEST CORPORATION	9636	GREELEY	CO
2016-09-01	225-351	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	ROUGON	LA
2016-09-01	225-513	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - LA	749E	JACKSON	LA
2016-09-01	405-581	2XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OK	5257	EARLSBORO	OK
2016-09-01	515-300	0–9 XXXall 10 · 2 holders which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
2016-09-01	520-340	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	CASAGRANDE	AZ
2016-09-01	539-286	0–9 XXXall 10 · 8 holders which blocks →	T-MOBILE USA, INC.	6529	OKMULGEE	OK
2016-09-01	587-819	not yet reported which blocks →	Iristel Inc.	154E	Red Deer	—
2016-09-01	816-609	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MO	6123	KANSASCITY	MO
2016-08-31	209-306	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SANANDREAS	CA
2016-08-31	236-320	not yet reported which blocks →	Shaw Telecom Inc.	497E	Chase	—
2016-08-31	236-321	not yet reported which blocks →	Shaw Telecom Inc.	497E	Sicamous	—
2016-08-31	236-322	not yet reported which blocks →	Shaw Telecom Inc.	497E	Tofino	—
2016-08-31	346-816	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARCOLA	TX
2016-08-31	365-802	not yet reported which blocks →	Iristel Inc.	154E	Oshawa	—
2016-08-31	405-480	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ANADARKO	OK
2016-08-31	424-537	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SNMN MRVS	CA
2016-08-31	425-362	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
2016-08-31	431-303	not yet reported which blocks →	Iristel Inc.	154E	Portage La Prairie	—
2016-08-31	484-510	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	BETHLEHEM	PA
2016-08-31	559-207	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CLOVIS	CA
2016-08-31	605-504	0–9 XXXwhole prefix which blocks →	QWEST CORPORATION	9631	SIOUX FLS	SD
2016-08-31	641-307	0XXX3XXX6XXX7XXX9XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	GUTHRIECTR	IA
2016-08-31	650-448	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	MT VIEW	CA
2016-08-31	660-297	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	WINDSTREAM MISSOURI, INC.	1885	ALBANY	MO
2016-08-31	720-534	0–9 XXXall 10 · 3 holders which blocks →	VONAGE AMERICA LLC	197D	LONGMONT	CO
2016-08-31	769-231	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MADISON	MS
2016-08-31	936-320	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CONROE	TX
2016-08-30	236-361	not yet reported which blocks →	Iristel Inc.	154E	Kelowna	—
2016-08-30	239-320	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - FL	937C	SNCPVISNDS	FL
2016-08-30	239-347	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - FL	937C	CAPE CORAL	FL
2016-08-30	239-351	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	NAPLES	FL
2016-08-30	239-360	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - FL	937C	CAPE CORAL	FL
2016-08-30	314-528	0–9 XXXall 10 · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	LADUE	MO
2016-08-30	346-336	0–9 XXXall 10 · 6 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	TOMBALL	TX
2016-08-30	484-473	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	W CHESTER	PA
2016-08-30	510-513	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	FRNK MAIN	CA

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.