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
2005-03-02	760-890	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	CALEXICO	CA
2005-03-02	928-466	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	CASTLEROCK	AZ
2005-03-01	204-282	not yet reported which blocks →	Bell West Inc.	2933	Winnipeg	—
2005-03-01	325-805	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	MASON	TX
2005-03-01	352-653	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BELLEVIEW	FL
2005-03-01	418-992	not yet reported which blocks →	Videotron Ltd.	8306	St-Fereol	—
2005-03-01	418-995	not yet reported which blocks →	Videotron Ltd.	8306	Ste-Petronille	—
2005-03-01	512-544	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7516	AUSTIN	TX
2005-03-01	571-209	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	LEESBURG	VA
2005-03-01	613-816	not yet reported which blocks →	TELUS Mobility	8303	Ottawa-Hull	—
2005-03-01	661-487	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BKFD MAIN	CA
2005-03-01	740-527	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	HEBRON	OH
2005-03-01	813-579	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	TAMPACEN	FL
2005-03-01	850-724	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	CENTURY	FL
2005-03-01	970-450	0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks →	ONVOY, LLC - CO	026D	RANGELY	CO
2005-03-01	970-508	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	ONVOY, LLC - CO	026D	DURANGO	CO
2005-03-01	970-538	0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	ONVOY, LLC - CO	026D	TELLURIDE	CO
2005-03-01	970-540	0XXX7XXX · 2 holders which blocks →	ONVOY, LLC - CO	026D	DELTA	CO
2005-03-01	970-610	2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CO	026D	FRUITA	CO
2005-03-01	970-649	0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - CO	026D	RIFLE	CO
2005-03-01	970-650	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - CO	026D	MONTROSE	CO
2005-03-01	970-684	0XXX2XXX3XXX5XXX7XXX9XXX · 4 holders which blocks →	ONVOY, LLC - CO	026D	PALISADE	CO
2005-03-01	970-784	0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CO	026D	GUNNISON	CO
2005-02-28	224-633	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	BARRINGTON	IL
2005-02-28	224-757	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	ROUND LAKE	IL
2005-02-28	419-318	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	SYLVANIA	OH
2005-02-28	425-441	0–9 XXXall 10 · 5 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7173	FALL CITY	WA
2005-02-28	617-659	0–9 XXXall 10 · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	NEWTON	MA
2005-02-28	630-952	0–9 XXXwhole prefix which blocks →	FIRST COMMUNICATIONS, LLC	460K	AURORA	IL
2005-02-28	646-415	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN01	NY
2005-02-28	646-416	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN01	NY
2005-02-28	646-417	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN01	NY
2005-02-28	703-398	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	DALE CITY	VA
2005-02-28	801-683	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - UT	3231	BOUNTIFUL	UT
2005-02-28	845-269	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HAVERSTRAW	NY
2005-02-28	850-610	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	PAETEC ITEL, LLC	829J	CANTONMENT	FL
2005-02-28	850-810	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	MILTON	FL
2005-02-28	850-910	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PACE	FL
2005-02-28	857-203	0–9 XXXall 10 · 5 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	JAMAICA PL	MA
2005-02-28	940-421	not yet reported which blocks →	SANTA ROSA TELEPHONE COOPERATIVE, INC.	4046	MUNDAY	TX
2005-02-28	951-489	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MORENO	CA
2005-02-28	985-492	0–9 XXXall 10 · 8 holders which blocks →	COMCAST IP PHONE, LLC	318J	THIBODAUX	LA
2005-02-27	320-633	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks →	MCC TELEPHONY OF MINNESOTA, LLC - MN	719F	BELGRADE	MN
2005-02-26	507-953	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	MCC TELEPHONY LLC	593K	MONTGOMERY	MN
2005-02-25	418-994	not yet reported which blocks →	Videotron Ltd.	8306	St-Jean-ile-d'Orleans	—
2005-02-25	450-526	not yet reported which blocks →	Videotron Ltd.	8306	St-Polycarpe	—
2005-02-25	502-410	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - KY	4369	LOUISVILLE	KY
2005-02-25	507-868	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	MCC TELEPHONY LLC	593K	HENDERSON	MN
2005-02-25	519-266	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	London	—
2005-02-25	519-709	not yet reported which blocks →	TELUS Mobility	8303	London	—

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.