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
2014-08-25	918-998	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF OKLAHOMA, LLC - OK	384H	TULSA	OK
2014-08-25	937-936	0–9 XXXall 10 · 8 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	BOWERSVLLE	OH
2014-08-25	951-390	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	HEMT HEMT	CA
2014-08-25	970-702	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	GREELEY	CO
2014-08-22	289-502	not yet reported which blocks →	Zayo Canada Inc.	8304	Thornhill	—
2014-08-22	312-483	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2014-08-22	312-522	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2014-08-22	312-866	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2014-08-22	412-652	0–9 XXXall 10 · 4 holders which blocks →	AIRUS, INC. - PA	438H	PTTSBGZON1	PA
2014-08-22	437-826	not yet reported which blocks →	Zayo Canada Inc.	8304	Toronto	—
2014-08-22	437-828	not yet reported which blocks →	Zayo Canada Inc.	8304	Toronto	—
2014-08-22	440-485	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CHAGRINFLS	OH
2014-08-22	470-324	0–9 XXXwhole prefix which blocks →	BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL	9417	ATLANTA NW	GA
2014-08-22	470-398	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ADAIRSVL	GA
2014-08-22	470-425	0–9 XXXwhole prefix which blocks →	BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL	9417	ATLANTA NW	GA
2014-08-22	470-675	0–9 XXXwhole prefix which blocks →	BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL	9417	ATLANTA NW	GA
2014-08-22	587-443	not yet reported which blocks →	Zayo Canada Inc.	8304	Calgary	—
2014-08-22	720-809	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	DENVER	CO
2014-08-22	816-945	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7594	KANSASCITY	MO
2014-08-22	937-931	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	DAYTON	OH
2014-08-22	956-516	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAREDO	TX
2014-08-21	289-406	not yet reported which blocks →	Zayo Canada Inc.	8304	Brampton	—
2014-08-21	306-509	not yet reported which blocks →	Zayo Canada Inc.	8304	Regina	—
2014-08-21	343-292	not yet reported which blocks →	Zayo Canada Inc.	8304	Ottawa-Hull	—
2014-08-21	415-792	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SNFC CNTRL	CA
2014-08-21	424-358	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TORRANCE	CA
2014-08-21	424-362	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BEVERLYHLS	CA
2014-08-21	438-387	not yet reported which blocks →	Videotron Ltd.	8306	Montreal	—
2014-08-21	581-366	not yet reported which blocks →	Zayo Canada Inc.	8304	Quebec	—
2014-08-21	602-900	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF ARIZONA, LLC - AZ	579F	PHOENIX	AZ
2014-08-21	619-536	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	EL CAJON	CA
2014-08-21	626-238	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ALHAMBRA	CA
2014-08-21	716-329	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	TONAWANDA	NY
2014-08-21	720-709	0–9 XXXall 10 · 6 holders which blocks →	PAETEC ITEL, LLC	829J	DENVER	CO
2014-08-21	786-636	0–9 XXXall 10 · 5 holders which blocks →	OPTICAL TELECOMMUNICATIONS, INC. - FL	480D	MIAMI	FL
2014-08-21	803-626	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF SOUTH CAROLINA, LLC - SC	098H	COLUMBIA	SC
2014-08-21	843-872	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF SOUTH CAROLINA, LLC - SC	098H	CHARLESTON	SC
2014-08-21	864-626	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF SOUTH CAROLINA, LLC - SC	098H	GREENVILLE	SC
2014-08-21	916-634	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SCRM NORTH	CA
2014-08-20	215-515	0–9 XXXall 10 · 3 holders which blocks →	AIRUS, INC. - PA	438H	PHLDLPHZN1	PA
2014-08-20	317-969	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	INDIANAPLS	IN
2014-08-20	360-986	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	ABERDEEN	WA
2014-08-20	501-502	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LITTLEROCK	AR
2014-08-20	506-200	not yet reported which blocks →	TELUS Integrated Communications	2782	Edmundston	—
2014-08-20	506-239	not yet reported which blocks →	TELUS Integrated Communications	2782	Dalhousie	—
2014-08-20	506-240	not yet reported which blocks →	TELUS Integrated Communications	2782	Grand Falls	—
2014-08-20	506-241	not yet reported which blocks →	TELUS Integrated Communications	2782	Saint-Quentin	—
2014-08-20	506-242	not yet reported which blocks →	TELUS Integrated Communications	2782	Shippagan	—
2014-08-20	506-243	not yet reported which blocks →	TELUS Integrated Communications	2782	Woodstock	—
2014-08-20	725-502	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LAS VEGAS	NV

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.