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
2016-08-08	438-924	not yet reported which blocks →	Fido Solutions Inc.	5643	Montreal	—
2016-08-08	502-388	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BARDSTOWN	KY
2016-08-08	518-804	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF NEW YORK, LLC - NY	155E	GLENSFALLS	NY
2016-08-08	747-218	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	LACRSCENTA	CA
2016-08-08	778-598	not yet reported which blocks →	Fido Solutions Inc.	5643	Abbotsford	—
2016-08-08	786-792	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	MIAMI	FL
2016-08-08	786-848	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2016-08-08	857-419	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MILTON	MA
2016-08-08	858-280	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	DEL MAR	CA
2016-08-05	254-347	0–9 XXXall 10 · 4 holders which blocks →	TEXAS WINDSTREAM, LLC	2153	VALLEY ML	TX
2016-08-05	646-956	0–9 XXXall 10 · 2 holders which blocks →	NUSO, LLC	551G	NWYRCYZN01	NY
2016-08-05	774-539	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	BROCKTON	MA
2016-08-05	774-559	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA	268F	BARNSTABLE	MA
2016-08-05	909-640	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	RIALTO	CA
2016-08-05	949-664	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	IRVINE	CA
2016-08-04	216-762	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CLEVELAND	OH
2016-08-04	309-516	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	KILBOURNE	IL
2016-08-04	309-605	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BATH	IL
2016-08-04	469-451	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LEWISVILLE	TX
2016-08-04	469-687	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	DALLAS	TX
2016-08-04	507-706	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	MARSHALL	MN
2016-08-04	612-434	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	TWINCITIES	MN
2016-08-04	857-386	0–9 XXXall 10 · 6 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	CHELSEA	MA
2016-08-03	208-813	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID	678B	BOISE	ID
2016-08-03	417-306	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	SPRINGFLD	MO
2016-08-03	431-299	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Glenboro	—
2016-08-03	431-399	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Erickson	—
2016-08-03	647-275	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2016-08-03	682-245	0–9 XXXall 10 · 2 holders which blocks →	TEXAS WINDSTREAM, LLC	2153	GODLEY	TX
2016-08-03	682-772	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARLINGTON	TX
2016-08-03	825-980	not yet reported which blocks →	Bell Mobility	6574	Calgary	—
2016-08-03	873-205	not yet reported which blocks →	TELUS Quebec	2243	Temiscaming	—
2016-08-03	940-762	7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WOODSON	TX
2016-08-02	240-971	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	FREDERICK	MD
2016-08-02	249-879	not yet reported which blocks →	TELUS Mobility	8303	Sudbury	—
2016-08-02	315-936	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	MEXICO	NY
2016-08-02	343-603	not yet reported which blocks →	Bell Canada	8051	Belleville	—
2016-08-02	343-604	not yet reported which blocks →	Bell Canada	8051	Brockville	—
2016-08-02	343-605	not yet reported which blocks →	Bell Canada	8051	Cornwall	—
2016-08-02	343-606	not yet reported which blocks →	Bell Canada	8051	Hawkesbury	—
2016-08-02	343-607	not yet reported which blocks →	Bell Canada	8051	Kingston	—
2016-08-02	343-608	not yet reported which blocks →	Bell Canada	8051	Smiths Falls	—
2016-08-02	343-609	not yet reported which blocks →	Bell Canada	8051	Pembroke	—
2016-08-02	352-747	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - FL	937C	EUSTIS	FL
2016-08-02	386-276	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	PALM COAST	FL
2016-08-02	386-507	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - FL	937C	DELAND	FL
2016-08-02	407-868	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	ORLANDO	FL
2016-08-02	430-205	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	TYLER	TX
2016-08-02	505-317	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2016-08-02	505-365	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	SANTA FE	NM

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.