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
2016-08-02	507-704	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	ALTURA	MN
2016-08-02	540-696	0–9 XXXall 10 · 8 holders which blocks →	AT&T - LOCAL	7421	PEARISBURG	VA
2016-08-02	626-615	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ALHAMBRA	CA
2016-08-02	681-494	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BECKLEY	WV
2016-08-02	734-294	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	BELLEVILLE	MI
2016-08-02	774-765	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	METROPCS, INC.	5562	FOXBORO	MA
2016-08-02	778-975	not yet reported which blocks →	TELUS	8086	Lantzville	—
2016-08-02	845-376	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NEW CITY	NY
2016-08-02	850-860	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	PENSACOLA	FL
2016-08-02	863-308	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	LAKELAND	FL
2016-08-02	909-488	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	REDLANDS	CA
2016-08-02	925-495	0–9 XXXall 10 · 8 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LIVERMORE	CA
2016-08-01	475-231	0–9 XXXall 10 · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	TRUMBULL	CT
2016-08-01	502-398	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - KY	4369	LOUISVILLE	KY
2016-08-01	509-558	0–9 XXXall 10 · 4 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7173	SPOKANE	WA
2016-08-01	579-480	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Hyacinthe	—
2016-08-01	581-475	not yet reported which blocks →	ISP Telecom Inc.	4727	Chicoutimi	—
2016-08-01	581-476	not yet reported which blocks →	ISP Telecom Inc.	4727	Alma	—
2016-08-01	608-640	0–9 XXXall 10 · 5 holders which blocks →	UNITED STATES CELLULAR - WI	6274	MADISON	WI
2016-08-01	647-264	not yet reported which blocks →	Distributel	082E	Toronto	—
2016-08-01	647-265	not yet reported which blocks →	Distributel	082E	Toronto	—
2016-08-01	778-715	not yet reported which blocks →	Iristel Inc.	154E	Fort St. John	—
2016-08-01	804-485	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	OLD CHURCH	VA
2016-08-01	808-517	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	HONOLULU	HI
2016-08-01	873-478	not yet reported which blocks →	ISP Telecom Inc.	4727	Ste-Agathe	—
2016-08-01	873-922	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Lac-Megantic	—
2016-08-01	971-762	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OR	076F	BEAVERTON	OR
2016-08-01	980-289	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	GASTONIA	NC
2016-08-01	984-233	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	RALEIGH	NC
2016-07-29	209-279	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	STOCKTON	CA
2016-07-29	231-495	0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BELLAIRE	MI
2016-07-29	458-229	0–9 XXXall 10 · 4 holders which blocks →	UNITED STATES CELLULAR - OR	6349	GRANTSPASS	OR
2016-07-29	510-424	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	OKLD FRTVL	CA
2016-07-29	510-626	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	OKLD TRNID	CA
2016-07-29	510-901	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	HAYWARD	CA
2016-07-29	628-207	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SNFC MT-EV	CA
2016-07-29	747-217	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	VAN NUYS	CA
2016-07-29	786-862	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	KEYS	FL
2016-07-29	803-862	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	COLUMBIA	SC
2016-07-29	915-330	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EL PASO	TX
2016-07-28	205-859	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	GARDENDALE	AL
2016-07-28	256-804	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	HAZELGREEN	AL
2016-07-28	319-299	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	BELLEPLAIN	IA
2016-07-28	385-289	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	OGDEN	UT
2016-07-28	563-863	not yet reported which blocks →	NEIT SERVICES LLC - IA	859H	POSTVILLE	IA
2016-07-28	573-963	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	NEW MADRID	MO
2016-07-28	641-432	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	FORESTCITY	IA
2016-07-28	717-663	0–9 XXXall 10 · 4 holders which blocks →	CTSI, INC. - PA	7513	LANCASTER	PA
2016-07-28	786-865	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2016-07-28	806-551	1XXX2XXX6XXX9XXX · 4 holders which blocks →	VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW	1163	LITTLEFLD	TX

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.