Recent prefix assignments

358 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
2005-02-04	937-521	0–9 XXXall 10 · 6 holders which blocks →	CINCINNATI BELL EXTENDED TERRITORIES LLC - OH	309B	SPRINGFLD	OH
2005-02-04	970-298	0–9 XXXwhole prefix which blocks →	QWEST CORPORATION	9636	GRAND JCT	CO
2005-02-03	203-508	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	NEW HAVEN	CT
2005-02-03	215-609	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	PHLDLPHZN1	PA
2005-02-03	302-650	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	WILMINGTON	DE
2005-02-03	303-815	0–9 XXXall 10 · 3 holders which blocks →	INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO	5972	DENVER	CO
2005-02-03	347-410	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-02-03	347-417	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-02-03	347-419	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-02-03	352-430	0–9 XXXall 10 · 2 holders which blocks →	CENTURYLINK OF FLORIDA, INC. (UNITED)	0341	LADY LAKE	FL
2005-02-03	406-624	0–9 XXXall 10 · 6 holders which blocks →	MONTANA OPTICOM, LLC - MT	746D	BOZEMAN	MT
2005-02-03	423-601	1XXX2XXX3XXX · 2 holders which blocks →	BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL	9419	BULLS GAP	TN
2005-02-03	443-740	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2005-02-03	450-212	not yet reported which blocks →	Videotron Ltd.	8306	Ste-Martine	—
2005-02-03	450-213	not yet reported which blocks →	Videotron Ltd.	8306	St-Denis	—
2005-02-03	450-571	not yet reported which blocks →	Videotron Ltd.	8306	St-Ours	—
2005-02-03	450-573	not yet reported which blocks →	Videotron Ltd.	8306	Contrecoeur	—
2005-02-03	450-615	not yet reported which blocks →	Videotron Ltd.	8306	St-Remi	—
2005-02-03	450-989	not yet reported which blocks →	Videotron Ltd.	8306	Ste-Victoire	—
2005-02-03	484-615	1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PHPHSBZN28	PA
2005-02-03	580-451	1XXX5XXX · 2 holders which blocks →	UNITED STATES CELLULAR - OK	6272	DOUGHERTY	OK
2005-02-03	615-697	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	WATERTOWN	TN
2005-02-03	740-281	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	NEWARK	OH
2005-02-03	780-633	not yet reported which blocks →	Bell West Inc.	2933	Edmonton	—
2005-02-03	780-647	not yet reported which blocks →	TELUS	8084	Red Earth	—
2005-02-03	785-534	1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS	6532	BELOIT	KS
2005-02-03	785-686	not yet reported which blocks →	NEX-TECH, LLC - KS	4366	SMITH CTR	KS
2005-02-03	785-688	not yet reported which blocks →	NEX-TECH, LLC - KS	4366	PLAINVILLE	KS
2005-02-03	804-239	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	RICHMOND	VA
2005-02-03	819-885	not yet reported which blocks →	Videotron Ltd.	8306	St-Andre-Avellin	—
2005-02-03	907-768	not yet reported which blocks →	MATANUSKA TEL. ASSN., INC.	3015	CANTWELL	AK
2005-02-02	208-688	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TYGEE VLY	ID
2005-02-02	224-610	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	WAUKEGAN	IL
2005-02-02	239-232	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	EVERGLADES	FL
2005-02-02	269-558	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 9 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	MARSHALL	MI
2005-02-02	270-505	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	ELIZABTHTN	KY
2005-02-02	317-664	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	INDIANAPLS	IN
2005-02-02	408-726	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SNJS NORTH	CA
2005-02-02	502-210	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL KENTUCKY LICENSES, INC.	365C	LOUISVILLE	KY
2005-02-02	585-672	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	ROCHESTER	NY
2005-02-02	619-632	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CHULAVISTA	CA
2005-02-02	619-793	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	SNDG SNDG	CA
2005-02-02	803-406	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	NO SUMTER	SC
2005-02-02	845-784	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	NEWBURGH	NY
2005-02-02	954-297	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	FTLAUDERDL	FL
2005-02-02	971-285	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OR	3234	PORTLAND	OR
2005-02-01	330-407	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	NEWPHLDLPH	OH
2005-02-01	575-802	3XXX5XXX7XXX · 2 holders which blocks →	MESCALERO APACHE TELECOM, INC. - NM	661D	RUIDOSO	NM
2005-02-01	610-340	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	POTTSTOWN	PA
2005-02-01	641-316	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	IOWA FALLS	IA

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.