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
2005-02-25	570-877	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SCRANTON	PA
2005-02-25	620-210	3XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BAXTER SPG	KS
2005-02-25	647-230	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2005-02-25	757-309	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	NRFOLKZON2	VA
2005-02-25	778-899	not yet reported which blocks →	TELUS Mobility	8301	Vancouver	—
2005-02-25	804-263	0–9 XXXall 10 · 4 holders which blocks →	VERIZON VIRGINIA, INC.	9213	RICHMOND	VA
2005-02-25	814-806	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	ERIE	PA
2005-02-25	906-214	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	IRON RIVER	MI
2005-02-25	918-872	0–9 XXXall 10 · 3 holders which blocks →	VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW	1165	BROKENARRW	OK
2005-02-24	224-535	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	ELGIN	IL
2005-02-24	419-718	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	CARDINGTON	OH
2005-02-24	660-654	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	TRENTON	MO
2005-02-24	678-865	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	GAINESVL	GA
2005-02-24	740-848	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	FREDERCKTN	OH
2005-02-24	864-717	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 TELECOM OF SOUTH CAROLINA, LLC - SC	7273	GREENVILLE	SC
2005-02-24	937-887	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	W LIBERTY	OH
2005-02-23	256-689	3XXX4XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	ANNISTON	AL
2005-02-23	256-701	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	HUNTSVILLE	AL
2005-02-23	310-653	0–9 XXXwhole prefix which blocks →	PACIFIC BELL	9740	EL SEGUNDO	CA
2005-02-23	318-816	4XXX5XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA	6505	MONROE	LA
2005-02-23	337-281	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA	6505	LAFAYETTE	LA
2005-02-23	519-320	not yet reported which blocks →	Bell Mobility	6574	Woodstock	—
2005-02-23	608-719	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STOUGHTON	WI
2005-02-23	647-218	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2005-02-23	706-852	not yet reported which blocks →	BD OF WATER, LIGHT & SINKING FUND COMM, DBA DALTON	3139	COHUTTA	GA
2005-02-23	714-851	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANAHEIM	CA
2005-02-23	760-844	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PALM SPG	CA
2005-02-23	803-813	not yet reported which blocks →	SOUTH CAROLINA NET, INC. - SC	1784	ORANGEBURG	SC
2005-02-23	819-551	not yet reported which blocks →	Videotron Ltd.	8306	Arthabaska	—
2005-02-23	819-882	not yet reported which blocks →	Videotron Ltd.	8306	Norbertville	—
2005-02-23	918-614	0XXX1XXX8XXX9XXX · 3 holders which blocks →	VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW	1165	WAGONER	OK
2005-02-23	937-719	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	WESTMILTON	OH
2005-02-22	251-538	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	BREWTON	AL
2005-02-22	254-970	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	FLORENCE	TX
2005-02-22	310-561	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	TORRANCE	CA
2005-02-22	320-432	2XXX3XXX4XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MN	5256	HOLMESCITY	MN
2005-02-22	347-527	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN08	NY
2005-02-22	415-632	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SNFC CNTRL	CA
2005-02-22	416-300	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Toronto	—
2005-02-22	416-400	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Toronto	—
2005-02-22	416-500	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Toronto	—
2005-02-22	416-710	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Toronto	—
2005-02-22	418-746	not yet reported which blocks →	Videotron Ltd.	8306	Ste-Anne-de-Beaupre	—
2005-02-22	418-762	not yet reported which blocks →	Videotron Ltd.	8306	Boischatel	—
2005-02-22	509-676	0–9 XXXall 10 · 6 holders which blocks →	TELEWISE, LLC - WA	4718	WALLAWALLA	WA
2005-02-22	516-673	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NASSAUZN02	NY
2005-02-22	519-278	not yet reported which blocks →	Bell Mobility	6574	Orangeville	—
2005-02-22	618-385	1XXX5XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	TAMAROA	IL
2005-02-22	618-441	1XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	ASHLEY	IL
2005-02-22	618-507	1XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	WOODLAWN	IL

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.