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
2011-09-23	210-307	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SANANTONIO	TX
2011-09-23	254-263	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	REAGAN	TX
2011-09-23	302-281	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	HOLLY OAK	DE
2011-09-23	305-709	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	KEYS	FL
2011-09-23	320-228	0–9 XXXall 10 · 6 holders which blocks →	MIDCONTINENT COMMUNICATIONS - MN	429A	HOLDINGFD	MN
2011-09-23	321-270	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	ORLANDO	FL
2011-09-23	325-229	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	WESTBROOK	TX
2011-09-23	414-323	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2011-09-23	430-235	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	LINDL SWAN	TX
2011-09-23	469-216	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2011-09-23	469-260	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2011-09-23	512-575	0–9 XXXall 10 · 8 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SMITHVILLE	TX
2011-09-23	515-829	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
2011-09-23	587-267	not yet reported which blocks →	Bell West Inc.	2933	Edson	—
2011-09-23	587-920	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-921	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-922	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-923	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-924	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-925	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-09-23	587-990	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2011-09-23	587-991	not yet reported which blocks →	TELUS Mobility	8301	Edmonton	—
2011-09-23	613-209	not yet reported which blocks →	Iristel Inc.	154E	Cornwall	—
2011-09-23	651-240	0–9 XXXall 10 · 3 holders which blocks →	MIDCONTINENT COMMUNICATIONS - MN	429A	TAYLORSFLS	MN
2011-09-23	713-904	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	HOUSTON	TX
2011-09-23	720-469	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DENVER	CO
2011-09-23	806-307	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SKELLYTOWN	TX
2011-09-23	813-302	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	TAMPACEN	FL
2011-09-23	832-312	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2011-09-23	832-540	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2011-09-23	914-296	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	POUNDRIDGE	NY
2011-09-23	956-396	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	FALCON HTS	TX
2011-09-22	226-400	not yet reported which blocks →	Iristel Inc.	154E	Brantford	—
2011-09-22	289-815	not yet reported which blocks →	Iristel Inc.	154E	Oakville	—
2011-09-22	302-268	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WILMINGTON	DE
2011-09-22	347-955	0–9 XXXall 10 · 5 holders which blocks →	CSC VOICE, LLC	612K	NWYRCYZN06	NY
2011-09-22	501-248	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LITTLEROCK	AR
2011-09-22	609-478	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	SEAIS CITY	NJ
2011-09-22	610-816	0–9 XXXall 10 · 6 holders which blocks →	WINDSTREAM D & E SYSTEMS, INC. - PA	4114	READING	PA
2011-09-22	646-564	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF NEW YORK, LLC - NY	155E	NWYRCYZN01	NY
2011-09-22	716-256	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BUFFALO	NY
2011-09-22	716-264	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	TONAWANDA	NY
2011-09-22	717-736	0–9 XXXall 10 · 5 holders which blocks →	WINDSTREAM D & E SYSTEMS, INC. - PA	4114	HARISBGZN1	PA
2011-09-22	774-228	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	OSTERVILLE	MA
2011-09-22	774-303	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	WORCESTER	MA
2011-09-22	778-270	not yet reported which blocks →	Bell West Inc.	2933	Nelson	—
2011-09-22	778-271	not yet reported which blocks →	Bell West Inc.	2933	Terrace	—
2011-09-22	940-222	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DENTON	TX
2011-09-21	218-350	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	TWINVALLEY	MN
2011-09-21	224-229	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DESPLAINES	IL

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.