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
2016-08-30	559-371	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRESNO	CA
2016-08-30	587-818	not yet reported which blocks →	Iristel Inc.	154E	Grande Prairie	—
2016-08-30	626-491	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PSDN PSDN	CA
2016-08-30	650-447	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	MT VIEW	CA
2016-08-30	657-340	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	WESTMINSTR	CA
2016-08-30	669-278	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CAMPBELL	CA
2016-08-30	925-436	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	ANTIOCH	CA
2016-08-29	226-536	not yet reported which blocks →	Quadro Communications Co-operative Inc.	004G	Woodstock	—
2016-08-29	343-665	not yet reported which blocks →	Videotron Ltd.	787G	Ottawa-Hull	—
2016-08-29	424-390	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	REDONDO	CA
2016-08-29	614-680	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	COLUMBUS	OH
2016-08-29	614-965	0–9 XXXall 10 · 5 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	COLUMBUS	OH
2016-08-29	661-416	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ARVIN	CA
2016-08-29	669-208	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	LOS GATOS	CA
2016-08-29	669-209	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SAN MARTIN	CA
2016-08-29	669-210	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNJS WEST	CA
2016-08-29	720-676	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DENVER	CO
2016-08-29	786-867	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2016-08-26	209-360	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	MODESTO	CA
2016-08-26	224-551	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DEERFIELD	IL
2016-08-26	314-343	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CREVECOEUR	MO
2016-08-26	320-430	0XXX4XXX9XXX · 3 holders which blocks →	WINDSTREAM LAKEDALE, INC.	1414	ANNANDALE	MN
2016-08-26	407-820	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	ORLANDO	FL
2016-08-26	470-341	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - GA	8392	ATLANTA SO	GA
2016-08-26	510-738	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	FRNK OLIVR	CA
2016-08-26	563-230	0–9 XXXall 10 · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	DYERSVILLE	IA
2016-08-26	619-480	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	NATIONALCY	CA
2016-08-26	657-343	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SILVERADO	CA
2016-08-26	657-344	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SILVERADO	CA
2016-08-26	657-345	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	YORBALINDA	CA
2016-08-26	702-849	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	MESQUITE	NV
2016-08-26	702-867	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NV	075F	MTCHARLETN	NV
2016-08-26	747-267	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	RESEDA	CA
2016-08-26	747-274	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SNFN PACM	CA
2016-08-26	828-588	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - NC	8389	BOONE	NC
2016-08-26	909-588	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	MENTONE	CA
2016-08-26	934-223	0–9 XXXall 10 · 6 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	SMITHTOWN	NY
2016-08-26	939-231	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	BAYAMONNOR	PR
2016-08-25	240-877	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	FREDERICK	MD
2016-08-25	504-612	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - LA	153F	LAFITTE	LA
2016-08-25	510-726	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CROCKETT	CA
2016-08-25	559-216	0–9 XXXall 10 · 3 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	FRESNO	CA
2016-08-25	579-473	not yet reported which blocks →	ISP Telecom Inc.	4727	Rawdon	—
2016-08-25	581-478	not yet reported which blocks →	ISP Telecom Inc.	4727	Dolbeau	—
2016-08-25	587-734	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Grande Cache	—
2016-08-25	614-639	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COLUMBUS	OH
2016-08-25	618-716	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC	224C	TRENTON	IL
2016-08-25	702-695	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	LAS VEGAS	NV
2016-08-25	873-480	not yet reported which blocks →	ISP Telecom Inc.	4727	Labelle	—
2016-08-25	951-416	0–9 XXXall 10 · 8 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	MIRA LOMA	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.