Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2011-09-12	915-207	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	VINTON	TX
2011-09-12	918-380	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	BRAGGS	OK
2011-09-09	207-245	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PORTLAND	ME
2011-09-09	401-403	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	PROVIDENCE	RI
2011-09-08	224-226	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	NORTHBROOK	IL
2011-09-08	224-261	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	NORTHBROOK	IL
2011-09-08	315-401	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	SYRACUSE	NY
2011-09-08	416-639	not yet reported which blocks →	Distributel	082E	Toronto	—
2011-09-08	438-829	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2011-09-08	438-830	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2011-09-08	438-831	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2011-09-08	438-832	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2011-09-08	505-200	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	ALBUQURQUE	NM
2011-09-08	585-380	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	BLISS	NY
2011-09-08	607-333	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	ELMIRA	NY
2011-09-08	651-383	0–9 XXXall 10 · 6 holders which blocks →	MIDCONTINENT COMMUNICATIONS - MN	429A	STILLWATER	MN
2011-09-08	716-249	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	BUFFALO	NY
2011-09-08	773-231	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	CHICGOZN07	IL
2011-09-08	828-222	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	FAIRVIEW	NC
2011-09-08	857-242	0–9 XXXall 10 · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CAMBRIDGE	MA
2011-09-08	857-268	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2011-09-08	862-277	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	VERONA	NJ
2011-09-08	978-221	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LOWELL	MA
2011-09-07	214-814	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	DLFTWTARPT	TX
2011-09-07	226-242	not yet reported which blocks →	Iristel Inc.	154E	Woodstock	—
2011-09-07	226-784	not yet reported which blocks →	Iristel Inc.	154E	Sarnia	—
2011-09-07	240-204	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WSHNGTNZN2	MD
2011-09-07	240-444	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	LAUREL236	MD
2011-09-07	302-660	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - DE	7220	WILMINGTON	DE
2011-09-07	360-338	0–9 XXXall 10 · 8 holders which blocks →	COMCAST IP PHONE, LLC	318J	OLYMPIA	WA
2011-09-07	443-903	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BEL AIR	MD
2011-09-07	443-915	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2011-09-07	443-941	0–9 XXXall 10 · 8 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELKTON	MD
2011-09-07	443-952	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WESTMINSTR	MD
2011-09-07	443-953	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SALISBURY	MD
2011-09-07	513-441	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
2011-09-07	587-352	not yet reported which blocks →	Shaw Telecom Inc.	497E	Calgary	—
2011-09-07	587-520	not yet reported which blocks →	Shaw Telecom Inc.	497E	Edmonton	—
2011-09-07	671-489	not yet reported which blocks →	TELEGUAM HOLDINGS, LLC	3922	AGANA	GU
2011-09-07	701-380	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - ND	452F	MAYVILLE	ND
2011-09-07	713-997	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	HOUSTON	TX
2011-09-07	740-292	0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	STOCKPORT	OH
2011-09-07	819-807	not yet reported which blocks →	Iristel Inc.	154E	Trois-Rivieres	—
2011-09-07	872-225	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	CHICGOZN01	IL
2011-09-07	978-942	0–9 XXXall 10 · 4 holders which blocks →	TC SYSTEMS, INC.	7135	LOWELL	MA
2011-09-06	204-808	not yet reported which blocks →	Iristel Inc.	154E	Winnipeg	—
2011-09-06	301-557	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	WSHNGTNZN3	MD
2011-09-06	306-992	not yet reported which blocks →	Iristel Inc.	154E	Regina	—
2011-09-06	331-213	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	NAPERVILLE	IL
2011-09-06	334-583	not yet reported which blocks →	PINE BELT CELLULAR, INC.	4260	ALBERTA	AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.