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
2005-01-07	703-956	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HERNDON	VA
2005-01-07	972-207	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-01-07	972-800	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-01-07	972-834	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-01-07	972-904	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-01-07	972-955	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2005-01-06	260-535	1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	SHIPSHEWNA	IN
2005-01-06	347-401	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-403	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-404	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-405	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-406	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-407	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2005-01-06	347-409	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN07	NY
2005-01-06	562-472	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LONG BEACH	CA
2005-01-06	574-655	5XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	FLORA	IN
2005-01-06	870-648	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TEXARKANA	AR
2005-01-06	910-595	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	MAYSVILLE	NC
2005-01-06	919-744	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	RALEIGH	NC
2005-01-06	936-222	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	CROCKETT	TX
2005-01-06	937-529	0–9 XXXall 10 · 7 holders which blocks →	METROPCS, INC.	5562	TROTWOOD	OH
2005-01-05	206-257	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	SEATTLE	WA
2005-01-05	406-694	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	BILLINGS	MT
2005-01-05	409-377	6XXX7XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SPURGER	TX
2005-01-05	480-747	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2005-01-05	801-349	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SALT LAKE	UT
2005-01-05	808-457	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	HONOLULU	HI
2005-01-05	912-304	0–9 XXXall 10 · 6 holders which blocks →	MCC TELEPHONY LLC	593K	LUMBERCITY	GA
2005-01-04	214-881	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	DALLAS	TX
2005-01-04	303-500	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	HUDSON	CO
2005-01-04	678-899	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - GA	6116	ADAIRSVL	GA
2005-01-04	678-956	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - GA	6116	ADAIRSVL	GA
2005-01-04	787-662	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	SANTURCE	PR
2005-01-04	815-989	0–9 XXXall 10 · 8 holders which blocks →	MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL	846F	PROPHETSTN	IL
2005-01-03	207-608	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SANFORD	ME
2005-01-03	310-986	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	LOMITA	CA
2005-01-03	530-588	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CHICO	CA
2005-01-03	562-657	0–9 XXXwhole prefix which blocks →	PACIFIC BELL (COMPETITIVE)	7480	DOWNEY	CA
2005-01-03	571-527	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	WSNGTNZN08	VA
2005-01-03	760-780	0–9 XXXall 10 · 6 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	VICTORVL	CA
2005-01-03	909-697	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	FONTANA	CA
2005-01-03	914-437	0–9 XXXall 10 · 4 holders which blocks →	CSC VOICE, LLC	612K	WSCHSTZN08	NY
2005-01-03	916-873	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SCRM MAIN	CA
2004-12-30	360-572	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MARYSVILLE	WA
2004-12-30	418-619	not yet reported which blocks →	Videotron Ltd.	8306	St-Nicolas	—
2004-12-30	418-761	not yet reported which blocks →	Videotron Ltd.	8306	Charny	—
2004-12-30	573-464	3XXX6XXX7XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	CALIFORNIA	MO
2004-12-30	573-622	0XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	CLARKSBURG	MO
2004-12-30	614-670	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COLUMBUS	OH
2004-12-30	660-242	2XXX5XXX6XXX7XXX8XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	MONTROSE	MO

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.