Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19

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
2020-08-13	574-501	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IN	097D	GOSHEN	IN
2020-08-13	603-607	1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks →	NUSO, LLC	478J	WCHESTEFLD	NH
2020-08-13	619-706	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHULAVISTA	CA
2020-08-13	629-895	0–9 XXXall 10 · 2 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	NASHVILLE	TN
2020-08-13	727-340	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	CLEARWATER	FL
2020-08-13	762-254	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	ROME	GA
2020-08-13	762-257	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	AUGUSTA	GA
2020-08-13	765-752	0XXX1XXX2XXX7XXX · 3 holders which blocks →	ONVOY, LLC - IN	097D	MECHANCSBG	IN
2020-08-13	808-480	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - HI	210H	HILO	HI
2020-08-13	828-822	1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks →	NUSO, LLC	478J	WATERVILLE	NC
2020-08-13	850-861	0–9 XXXall 10 · 2 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	PENSACOLA	FL
2020-08-13	850-917	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - FL	937C	VERNON	FL
2020-08-13	865-895	0–9 XXXall 10 · 8 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	KNOXVILLE	TN
2020-08-13	916-829	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ELK GROVE	CA
2020-08-13	949-594	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LAGUNA BCH	CA
2020-08-12	210-873	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	SANANTONIO	TX
2020-08-12	210-972	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TX	903C	SANANTONIO	TX
2020-08-12	240-730	0–9 XXXall 10 · 5 holders which blocks →	HD CARRIER LLC	321J	HAGERSTOWN	MD
2020-08-12	440-672	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	CLEVELAND	OH
2020-08-12	463-238	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	NOBLESVL	IN
2020-08-12	463-239	0–9 XXXall 10 · 4 holders which blocks →	HD CARRIER LLC	321J	INDIANAPLS	IN
2020-08-12	469-885	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	MCKINNEY	TX
2020-08-12	470-624	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	ATLANTA NW	GA
2020-08-12	667-286	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks →	HD CARRIER LLC	321J	SALISBURY	MD
2020-08-12	682-332	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	WEATHERFD	TX
2020-08-12	737-277	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TX	903C	AUSTIN	TX
2020-08-12	779-281	0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks →	ONVOY, LLC	224C	TOLUCA	IL
2020-08-12	779-991	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC	224C	LELAND	IL
2020-08-12	912-460	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - GA	6116	HINESVILLE	GA
2020-08-12	918-882	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BROKENARRW	OK
2020-08-11	267-910	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS ENTERPRISES, LP	6626	PHLDLPHZN3	PA
2020-08-11	309-802	0XXX1XXX8XXX9XXX · 4 holders which blocks →	HD CARRIER LLC	321J	PEORIA	IL
2020-08-11	405-864	0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	WICHITA ONLINE, INC. - OK	258F	CASHION	OK
2020-08-11	431-900	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Treherne	—
2020-08-11	431-901	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Rathwell	—
2020-08-11	431-902	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Austin	—
2020-08-11	458-592	0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	CAVE JCT	OR
2020-08-11	469-895	0–9 XXXall 10 · 4 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	DALLAS	TX
2020-08-11	581-973	not yet reported which blocks →	SSi Micro Ltd.	940G	Mistissini	—
2020-08-11	657-451	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HUNTITNBCH	CA
2020-08-11	707-870	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SANTA ROSA	CA
2020-08-11	719-508	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PEYTON	CO
2020-08-11	872-268	0–9 XXXall 10 · 4 holders which blocks →	HD CARRIER LLC	321J	CHICGOZN01	IL
2020-08-11	873-965	not yet reported which blocks →	SSi Micro Ltd.	940G	Nemaska	—
2020-08-10	307-372	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - WY	450F	DOUGLAS	WY
2020-08-10	307-407	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - WY	450F	WSPEARFISH	WY
2020-08-10	480-697	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2020-08-10	551-307	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	JERSEYCITY	NJ
2020-08-10	581-972	not yet reported which blocks →	SSi Micro Ltd.	940G	Chapais	—
2020-08-10	641-214	0XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DAVIS CITY	IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.