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
2011-08-18	910-838	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	ROSEBORO	NC
2011-08-18	956-349	not yet reported which blocks →	VTX COMMUNICATIONS, LLC	776A	LYFORD	TX
2011-08-17	231-427	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MACKINAWCY	MI
2011-08-17	234-227	not yet reported which blocks →	SUPER-NET, INC. - OH	155F	SHREVE	OH
2011-08-17	234-429	not yet reported which blocks →	SUPER-NET, INC. - OH	155F	SMITHVILLE	OH
2011-08-17	234-916	not yet reported which blocks →	SUPER-NET, INC. - OH	155F	FREDECKSBG	OH
2011-08-17	252-323	9XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	LA GRANGE	NC
2011-08-17	252-485	9XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	TRENTON	NC
2011-08-17	252-486	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	HALIFAX	NC
2011-08-17	252-629	1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	LITTLETON	NC
2011-08-17	312-241	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CHICGOZN01	IL
2011-08-17	317-350	0–9 XXXall 10 · 9 holders which blocks →	COMCAST IP PHONE, LLC	318J	BROWNSBURG	IN
2011-08-17	425-615	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BELLEVUE	WA
2011-08-17	647-470	not yet reported which blocks →	Videotron Ltd.	383F	Toronto	—
2011-08-17	647-687	not yet reported which blocks →	Videotron Ltd.	383F	Toronto	—
2011-08-17	772-200	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	PTST LUCIE	FL
2011-08-17	778-525	not yet reported which blocks →	Shaw Telecom Inc.	497E	Fairmont Hot Springs	—
2011-08-17	778-526	not yet reported which blocks →	Shaw Telecom Inc.	497E	Invermere	—
2011-08-17	778-527	not yet reported which blocks →	Shaw Telecom Inc.	497E	Radium	—
2011-08-17	812-286	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	NEWWSHNGTN	IN
2011-08-16	201-423	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	JERSEYCITY	NJ
2011-08-16	210-306	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SANANTONIO	TX
2011-08-16	226-354	not yet reported which blocks →	TELUS Integrated Communications	2782	Stratford	—
2011-08-16	231-403	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	WILLIAMSBG	MI
2011-08-16	234-323	not yet reported which blocks →	SUPER-NET, INC. - OH	155F	APPLECREEK	OH
2011-08-16	321-261	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	COCOA	FL
2011-08-16	401-318	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2011-08-16	515-505	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
2011-08-16	559-726	0–9 XXXall 10 · 5 holders which blocks →	WIDE VOICE, LLC - CA	252F	REEDLEY	CA
2011-08-16	601-640	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SEMINARY	MS
2011-08-16	603-200	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	NEWMARKET	NH
2011-08-16	604-259	not yet reported which blocks →	Iristel Inc.	154E	Vancouver	—
2011-08-16	604-260	not yet reported which blocks →	Iristel Inc.	154E	Vancouver	—
2011-08-16	609-316	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS ENTERPRISES, LP	6626	FORT DIX	NJ
2011-08-16	701-609	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND	6568	WILLISTON	ND
2011-08-16	701-818	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND	6568	MINOT	ND
2011-08-16	760-984	0–9 XXXall 10 · 7 holders which blocks →	WIDE VOICE, LLC - CA	252F	INDIO	CA
2011-08-16	769-222	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	UNION	MS
2011-08-16	769-227	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SILVER CRK	MS
2011-08-16	778-200	not yet reported which blocks →	Iristel Inc.	154E	Vancouver	—
2011-08-16	848-230	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	NEWBRNSWCK	NJ
2011-08-15	202-735	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	WSHNGTNZN1	DC
2011-08-15	240-438	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN3	MD
2011-08-15	289-756	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Binbrook	—
2011-08-15	289-757	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Caledonia	—
2011-08-15	289-758	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Hagersville	—
2011-08-15	289-759	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Mount Hope	—
2011-08-15	289-760	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Stoney Creek	—
2011-08-12	248-817	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	TROY	MI
2011-08-12	385-245	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	KAYSVILLE	UT

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.