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
2005-03-28	678-897	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	GAINESVL	GA
2005-03-28	703-955	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	HERNDON	VA
2005-03-28	706-980	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	DALTON	GA
2005-03-28	734-686	0–9 XXXall 10 · 3 holders which blocks →	ACD TELECOM, INC. - MI	3535	ANN ARBOR	MI
2005-03-28	757-350	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	EASTVILLE	VA
2005-03-28	773-816	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN10	IL
2005-03-28	773-987	0–9 XXXall 10 · 2 holders which blocks →	FIRST COMMUNICATIONS, LLC	460K	CHICGOZN10	IL
2005-03-28	904-369	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	ORANGEPARK	FL
2005-03-28	904-492	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	PNTVDRABCH	FL
2005-03-28	904-681	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	JACKSOLBCH	FL
2005-03-28	904-843	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF FLORIDA, LP - FL	7635	MIDDLEBURG	FL
2005-03-28	954-496	0–9 XXXall 10 · 3 holders which blocks →	FUSION CLOUD SERVICES, LLC	206A	FTLAUDERDL	FL
2005-03-26	417-361	0XXX2XXX3XXX5XXX7XXX · 3 holders which blocks →	MCC TELEPHONY LLC	593K	EVERTON	MO
2005-03-26	417-630	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	MARSHFIELD	MO
2005-03-25	256-781	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AL	5255	FRUITHURST	AL
2005-03-25	256-906	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AL	5255	RANBURNE	AL
2005-03-25	508-322	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WAREHAM	MA
2005-03-25	702-544	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LAS VEGAS	NV
2005-03-25	704-963	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC	7858	KANNAPOLIS	NC
2005-03-25	740-619	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	BARNESVL	OH
2005-03-25	906-322	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KINROSS	MI
2005-03-24	210-454	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	SANANTONIO	TX
2005-03-24	450-865	not yet reported which blocks →	Videotron Ltd.	8306	Rawdon	—
2005-03-24	450-945	not yet reported which blocks →	Videotron Ltd.	8306	St-Blaise	—
2005-03-24	450-946	not yet reported which blocks →	Videotron Ltd.	8306	Farnham	—
2005-03-24	502-415	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	LOUISVILLE	KY
2005-03-24	502-619	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	LOUISVILLE	KY
2005-03-24	504-526	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF LOUISIANA, LLC - LA	7488	NEWORLEANS	LA
2005-03-24	519-552	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	London	—
2005-03-24	519-553	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	Guelph	—
2005-03-24	519-554	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	Kitchener-Waterloo	—
2005-03-24	801-660	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	KAYSVILLE	UT
2005-03-24	813-965	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	TAMPA	FL
2005-03-24	819-675	not yet reported which blocks →	Videotron Ltd.	8306	North Hatley	—
2005-03-24	819-677	not yet reported which blocks →	Videotron Ltd.	8306	Waterville	—
2005-03-24	936-433	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LIVINGSTON	TX
2005-03-24	954-639	0–9 XXXall 10 · 7 holders which blocks →	FUSION CLOUD SERVICES, LLC	206A	HOLLYWOOD	FL
2005-03-23	270-608	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	CENTRAL CY	KY
2005-03-23	418-708	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	Quebec	—
2005-03-23	469-277	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	PLANO	TX
2005-03-23	502-409	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	LOUISVILLE	KY
2005-03-23	512-776	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7516	AUSTIN	TX
2005-03-23	571-292	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	MANASSAS	VA
2005-03-23	585-558	0–9 XXXall 10 · 7 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	WARSAW	NY
2005-03-23	612-345	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MN	184D	TWINCITIES	MN
2005-03-23	613-357	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	Ottawa-Hull	—
2005-03-23	619-587	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CHULAVISTA	CA
2005-03-23	662-787	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 TELECOM OF MISSISSIPPI, LLC - MS	220C	MEMPHIS	MS
2005-03-23	706-371	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	HARTWELL	GA
2005-03-23	814-403	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	ERIE	PA

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.