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
2011-08-23	310-912	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	INGLEWOOD	CA
2011-08-23	415-470	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNFC CNTRL	CA
2011-08-23	434-448	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	CONCORD	VA
2011-08-23	681-235	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV	6394	SCOTTDEPOT	WV
2011-08-23	773-492	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN08	IL
2011-08-23	778-528	not yet reported which blocks →	Shaw Telecom Inc.	497E	Jordan River	—
2011-08-23	778-853	not yet reported which blocks →	ISP Telecom Inc.	4727	Fort Langley	—
2011-08-23	786-354	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2011-08-23	803-262	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	AIKEN	SC
2011-08-23	804-505	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	MATHEWS	VA
2011-08-23	858-230	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	LA JOLLA	CA
2011-08-23	949-491	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	IRVINE	CA
2011-08-22	219-213	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	CROWNPOINT	IN
2011-08-22	331-225	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ELMHURST	IL
2011-08-22	386-457	0–9 XXXall 10 · 6 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	ORANGECITY	FL
2011-08-22	443-916	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2011-08-22	443-932	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2011-08-22	443-948	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	BALTIMORE	MD
2011-08-22	509-808	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SPOKANE	WA
2011-08-22	571-383	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MANASSAS	VA
2011-08-22	709-223	not yet reported which blocks →	Bragg Communications Inc.	4878	Greenspond	—
2011-08-22	709-281	not yet reported which blocks →	Bragg Communications Inc.	4878	Lumsden	—
2011-08-22	731-462	0–9 XXXall 10 · 7 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MEDINA	TN
2011-08-22	778-253	not yet reported which blocks →	TELUS Mobility	8301	Spences Bridge	—
2011-08-22	848-209	0–9 XXXall 10 · 7 holders which blocks →	BLOCK LINE SYSTEMS, LLC - NJ	835E	NEWBRNSWCK	NJ
2011-08-22	941-243	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BRADENTON	FL
2011-08-22	954-204	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	DEERFLDBCH	FL
2011-08-19	226-783	not yet reported which blocks →	Iristel Inc.	154E	Windsor	—
2011-08-19	250-900	not yet reported which blocks →	Iristel Inc.	154E	Victoria	—
2011-08-19	484-714	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ALLENTOWN	PA
2011-08-19	608-336	0–9 XXXall 10 · 5 holders which blocks →	UTELCO, INC.	0963	MONROE	WI
2011-08-19	608-773	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MID-PLAINS TEL., INC.	0881	CROSS PL	WI
2011-08-19	608-858	1XXX5XXX8XXX · 2 holders which blocks →	MID-PLAINS TEL., INC.	0881	MIDDLETON	WI
2011-08-19	778-400	not yet reported which blocks →	Iristel Inc.	154E	Victoria	—
2011-08-19	778-401	not yet reported which blocks →	Iristel Inc.	154E	Victoria	—
2011-08-19	819-410	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2011-08-18	202-308	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC	6402	WSHNGTNZN1	DC
2011-08-18	208-920	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SANDPOINT	ID
2011-08-18	240-340	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN2	MD
2011-08-18	240-400	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN2	MD
2011-08-18	312-257	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN01	IL
2011-08-18	361-323	not yet reported which blocks →	VTX COMMUNICATIONS, LLC	776A	FALFURRIAS	TX
2011-08-18	361-346	not yet reported which blocks →	VTX COMMUNICATIONS, LLC	776A	PREMONT	TX
2011-08-18	361-382	not yet reported which blocks →	VTX COMMUNICATIONS, LLC	776A	ORANGE GRV	TX
2011-08-18	361-996	not yet reported which blocks →	VTX COMMUNICATIONS, LLC	776A	AGUA DULCE	TX
2011-08-18	415-361	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SNFC CNTRL	CA
2011-08-18	458-206	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF OREGON, LLC - OR	7537	BEND	OR
2011-08-18	559-580	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	COARSEGOLD	CA
2011-08-18	609-246	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS ENTERPRISES, LP	6626	ATLNTIC CY	NJ
2011-08-18	862-247	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	PASSAIC	NJ

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.