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
2013-06-27	803-636	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - SC	5258	COLUMBIA	SC
2013-06-27	807-214	not yet reported which blocks →	Keewaytinook Okimakanak	717G	Sioux Lookout	—
2013-06-27	872-234	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN10	IL
2013-06-26	313-315	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	DETROITZN5	MI
2013-06-26	313-773	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	DETROITZN5	MI
2013-06-26	313-812	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	DETROITZN5	MI
2013-06-26	424-299	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SNMN SNMN	CA
2013-06-26	614-663	0–9 XXXall 10 · 5 holders which blocks →	OHIO BELL TEL CO	9321	GROVE CITY	OH
2013-06-26	740-271	5XXX9XXX · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MINFD SKDL	OH
2013-06-26	872-227	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN03	IL
2013-06-26	872-235	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN02	IL
2013-06-26	872-243	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN03	IL
2013-06-25	224-252	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	GRAYSLAKE	IL
2013-06-25	224-253	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ALGONQUIN	IL
2013-06-25	440-370	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	AMHERST	OH
2013-06-25	440-403	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	BEREA	OH
2013-06-25	440-421	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HILLCREST	OH
2013-06-25	520-213	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CASAGRANDE	AZ
2013-06-25	614-681	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	WORTHINGTN	OH
2013-06-25	720-550	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	DENVER	CO
2013-06-25	778-760	not yet reported which blocks →	Iristel Inc.	154E	Kelowna	—
2013-06-25	989-251	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	OWOSSO	MI
2013-06-24	317-665	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN	6725	INDIANAPLS	IN
2013-06-24	513-472	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MORROW	OH
2013-06-24	513-491	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	NEWTONSVL	OH
2013-06-24	714-592	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BREA	CA
2013-06-24	819-512	not yet reported which blocks →	Comwave Networks	160G	St-Felix-de-Kingsey	—
2013-06-24	819-590	not yet reported which blocks →	Comwave Networks	160G	Danville	—
2013-06-24	819-910	not yet reported which blocks →	Comwave Networks	160G	Lac-Megantic	—
2013-06-24	819-912	not yet reported which blocks →	Comwave Networks	160G	Richmond	—
2013-06-24	819-969	not yet reported which blocks →	Comwave Networks	160G	Sherbrooke	—
2013-06-24	819-970	not yet reported which blocks →	Comwave Networks	160G	South Durham	—
2013-06-24	832-750	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL	9533	HOUSTON	TX
2013-06-24	873-266	not yet reported which blocks →	Comwave Networks	160G	Weedon	—
2013-06-24	917-877	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN09	NY
2013-06-21	210-743	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	SANANTONIO	TX
2013-06-21	224-248	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ARLIGTNHTS	IL
2013-06-21	317-653	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	INDIANAPLS	IN
2013-06-21	343-268	not yet reported which blocks →	Comwave Networks	160G	Arden	—
2013-06-21	343-269	not yet reported which blocks →	Comwave Networks	160G	Bancroft	—
2013-06-21	343-270	not yet reported which blocks →	Comwave Networks	160G	Belleville	—
2013-06-21	343-271	not yet reported which blocks →	Comwave Networks	160G	Brighton	—
2013-06-21	423-491	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	JOHNSON CY	TN
2013-06-21	443-410	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GLENBURNIE	MD
2013-06-21	450-351	not yet reported which blocks →	Comwave Networks	160G	Beauharnois	—
2013-06-21	450-353	not yet reported which blocks →	Comwave Networks	160G	Howick	—
2013-06-21	450-364	not yet reported which blocks →	Comwave Networks	160G	St-Chrysostome	—
2013-06-21	450-387	not yet reported which blocks →	Comwave Networks	160G	St-Constant	—
2013-06-21	450-481	not yet reported which blocks →	Comwave Networks	160G	St-Remi	—
2013-06-21	540-970	0–9 XXXall 10 · 6 holders which blocks →	CITIZENS TELEPHONE COOPERATIVE - VA	544A	ROANOKE	VA

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.