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
2011-07-12	484-577	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	READING	PA
2011-07-12	503-509	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR	5820	STAYTON	OR
2011-07-12	587-330	not yet reported which blocks →	Iristel Inc.	154E	Calgary	—
2011-07-12	778-254	not yet reported which blocks →	TELUS Mobility	8301	Lytton	—
2011-07-12	778-629	not yet reported which blocks →	CityWest Cable (North) Corp - BC	705F	Port Edward	—
2011-07-12	808-321	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI	6516	HONOLULU	HI
2011-07-12	857-263	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2011-07-12	857-265	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BOSTON	MA
2011-07-11	224-235	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	NORTHBROOK	IL
2011-07-11	224-236	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	BARTLETT	IL
2011-07-11	229-287	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	PINEVIEW	GA
2011-07-11	315-418	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	SYRACUSE	NY
2011-07-11	315-570	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	UTICA	NY
2011-07-11	315-816	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	WATERTOWN	NY
2011-07-11	331-200	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	BARTLETT	IL
2011-07-11	480-249	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2011-07-11	480-257	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2011-07-11	480-261	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2011-07-11	480-267	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2011-07-11	518-414	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	ALBANY	NY
2011-07-11	518-415	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	GLENSFALLS	NY
2011-07-11	631-416	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BRENTWOOD	NY
2011-07-11	716-262	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	BUFFALO	NY
2011-07-11	716-263	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	TONAWANDA	NY
2011-07-11	754-220	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	POMPANOBCH	FL
2011-07-11	901-244	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL MEMPHIS LICENSES, INC.	7474	MEMPHIS	TN
2011-07-11	918-565	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	TULSA	OK
2011-07-11	973-524	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	CHATHAM	NJ
2011-07-08	201-494	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	HACKENSACK	NJ
2011-07-08	225-443	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - LA	153F	ROUGON	LA
2011-07-08	240-278	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	LAUREL236	MD
2011-07-08	240-578	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	FREDERICK	MD
2011-07-08	289-201	not yet reported which blocks →	Iristel Inc.	154E	Brampton	—
2011-07-08	312-434	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2011-07-08	402-507	0–9 XXXall 10 · 5 holders which blocks →	QWEST CORPORATION	9631	OMAHA	NE
2011-07-08	408-783	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNJS WEST	CA
2011-07-08	443-651	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2011-07-08	510-358	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	FRNK MAIN	CA
2011-07-08	587-710	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Edmonton	—
2011-07-08	587-717	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Calgary	—
2011-07-08	647-850	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2011-07-08	720-539	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DENVER	CO
2011-07-08	870-281	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BLYTHEVL	AR
2011-07-08	872-212	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN07	IL
2011-07-07	229-785	0–9 XXXall 10 · 7 holders which blocks →	WINDSTREAM GEORGIA COMMUNICATIONS CORP.	4332	MOULTRIE	GA
2011-07-07	470-429	0–9 XXXall 10 · 4 holders which blocks →	WINDSTREAM GEORGIA COMMUNICATIONS CORP.	4332	WINDER	GA
2011-07-07	478-313	0–9 XXXall 10 · 6 holders which blocks →	WINDSTREAM GEORGIA COMMUNICATIONS CORP.	4332	PERRY	GA
2011-07-07	706-532	0–9 XXXwhole prefix which blocks →	WINDSTREAM GEORGIA COMMUNICATIONS CORP.	4332	DALTON	GA
2011-07-07	719-418	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2011-07-07	912-493	0–9 XXXall 10 · 6 holders which blocks →	WINDSTREAM GEORGIA COMMUNICATIONS CORP.	4332	DOUGLAS	GA

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.