Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
2013-04-01	914-351	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	WSCHSTZN02	NY
2013-03-29	413-309	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	SPRINGFLD	MA
2013-03-29	858-465	0–9 XXXall 10 · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	DEL MAR	CA
2013-03-29	864-407	0–9 XXXall 10 · 5 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	GREENWOOD	SC
2013-03-29	865-331	0–9 XXXwhole prefix which blocks →	BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL	9419	KNOXVILLE	TN
2013-03-29	951-370	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SUN CITY	CA
2013-03-28	442-224	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	VISTA	CA
2013-03-28	480-378	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF ARIZONA, LLC - AZ	7552	PHOENIX	AZ
2013-03-28	581-430	not yet reported which blocks →	ISP Telecom Inc.	4727	Chibougamau	—
2013-03-28	607-298	0–9 XXXall 10 · 6 holders which blocks →	SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NY	932G	DEPOSIT	NY
2013-03-28	613-515	not yet reported which blocks →	ISP Telecom Inc.	4727	Ottawa-Hull	—
2013-03-28	639-471	not yet reported which blocks →	SaskTel Mobility	9868	Saskatoon	—
2013-03-28	705-407	not yet reported which blocks →	NorthernTel Limited Partnership	055H	Haileybury	—
2013-03-28	705-412	not yet reported which blocks →	NorthernTel Limited Partnership	055H	South Porcupine	—
2013-03-28	705-425	not yet reported which blocks →	NorthernTel Limited Partnership	055H	New Liskeard	—
2013-03-28	705-620	not yet reported which blocks →	NorthernTel Limited Partnership	055H	Timmins	—
2013-03-28	819-917	not yet reported which blocks →	ISP Telecom Inc.	4727	Rouyn-Noranda	—
2013-03-28	819-924	not yet reported which blocks →	ISP Telecom Inc.	4727	Malartic	—
2013-03-28	819-925	not yet reported which blocks →	ISP Telecom Inc.	4727	Lebel-sur-Quevillon	—
2013-03-28	819-940	not yet reported which blocks →	ISP Telecom Inc.	4727	La Sarre	—
2013-03-28	819-945	not yet reported which blocks →	ISP Telecom Inc.	4727	Cadillac	—
2013-03-28	819-946	not yet reported which blocks →	ISP Telecom Inc.	4727	Ville-Marie	—
2013-03-28	819-952	not yet reported which blocks →	ISP Telecom Inc.	4727	Senneterre	—
2013-03-28	819-954	not yet reported which blocks →	ISP Telecom Inc.	4727	Amos	—
2013-03-27	202-909	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSHNGTNZN1	DC
2013-03-27	469-518	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DALLAS	TX
2013-03-27	469-605	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	FRISCO	TX
2013-03-27	512-270	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	AUSTIN	TX
2013-03-27	567-418	0–9 XXXall 10 · 2 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	LIMA	OH
2013-03-27	707-379	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	VALLEYFORD	CA
2013-03-27	832-920	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LANGHAMCRK	TX
2013-03-27	832-941	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX	7239	HOUSTON	TX
2013-03-27	917-708	0–9 XXXall 10 · 5 holders which blocks →	CSC VOICE, LLC	612K	NWYRCYZN04	NY
2013-03-27	929-231	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN10	NY
2013-03-27	929-236	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF NEW YORK, LLC - NY	155E	NWYRCYZN07	NY
2013-03-27	929-244	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN10	NY
2013-03-27	929-252	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY	7133	NWYRCYZN06	NY
2013-03-27	951-399	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ELSINORE	CA
2013-03-26	253-204	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WA	483E	AUBURN	WA
2013-03-26	470-443	0–9 XXXall 10 · 2 holders which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	ATLANTA	GA
2013-03-26	575-265	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	CLOVIS	NM
2013-03-26	575-449	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NM	5470	LAS CRUCES	NM
2013-03-26	609-904	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF NEW JERSEY, LLC - NJ	264F	SOMERS PT	NJ
2013-03-26	734-431	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WAYNE	MI
2013-03-26	856-440	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF NEW JERSEY, LLC - NJ	264F	MILLVILLE	NJ
2013-03-26	913-313	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KANSASCITY	KS
2013-03-25	415-767	0–9 XXXall 10 · 6 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7174	SNFC CNTRL	CA
2013-03-25	442-244	0–9 XXXall 10 · 8 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	OCSD CRLS	CA
2013-03-25	682-219	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARLINGTON	TX
2013-03-25	682-240	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	ARLINGTON	TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.