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
2013-03-13	832-909	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2013-03-13	832-910	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	HOUSTON	TX
2013-03-13	857-304	0–9 XXXall 10 · 7 holders which blocks →	TC SYSTEMS, INC.	7135	WATERTOWN	MA
2013-03-13	919-391	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NC	998E	CHAPELHILL	NC
2013-03-13	970-415	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	GREELEY	CO
2013-03-12	626-986	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	LA PUENTE	CA
2013-03-12	657-845	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HUNTITNBCH	CA
2013-03-12	661-482	4XXX which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EDWARDS	CA
2013-03-12	661-941	0–9 XXXall 10 · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	LANCASTER	CA
2013-03-12	760-818	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	BARSTOW	CA
2013-03-12	858-263	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	LA JOLLA	CA
2013-03-12	864-518	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	GREENVILLE	SC
2013-03-12	915-212	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2013-03-12	919-717	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	DURHAM	NC
2013-03-12	951-923	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HEMT HMLD	CA
2013-03-12	956-406	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	HARLINGEN	TX
2013-03-12	979-213	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	BRYAN	TX
2013-03-11	210-585	0–9 XXXall 10 · 4 holders which blocks →	SOUTHWESTERN BELL	9533	SANANTONIO	TX
2013-03-11	240-608	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	FREDERICK	MD
2013-03-11	313-209	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	DETROITZN1	MI
2013-03-11	404-450	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2013-03-11	404-980	0–9 XXXwhole prefix which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	ATLANTA	GA
2013-03-11	423-430	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	JOHNSON CY	TN
2013-03-11	513-215	0–9 XXXwhole prefix which blocks →	CINCINNATI BELL	9348	CINCINNATI	OH
2013-03-11	667-253	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NUSO, LLC	551G	SALISBURY	MD
2013-03-11	667-303	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	BALTIMORE	MD
2013-03-11	815-329	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ROCKFORD	IL
2013-03-11	913-203	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	ATCHISON	KS
2013-03-11	937-818	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	DAYTON	OH
2013-03-11	940-616	not yet reported which blocks →	CHOICE WIRELESS, LC	3533	BELLEVUE	TX
2013-03-11	940-619	not yet reported which blocks →	CHOICE WIRELESS, LC	3533	IOWA PARK	TX
2013-03-10	626-671	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	COVINA	CA
2013-03-09	415-761	0–9 XXXall 10 · 8 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	NOVATO	CA
2013-03-09	661-481	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNCA NHCS	CA
2013-03-08	208-967	0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	NUSO, LLC	551G	COERDALENE	ID
2013-03-08	226-757	not yet reported which blocks →	Bell Mobility	6574	Windsor	—
2013-03-08	270-421	0–9 XXXall 10 · 2 holders which blocks →	POWERTEL KENTUCKY LICENSES, INC.	365C	BOWLNGGREN	KY
2013-03-08	334-631	1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	SHAWMUT	AL
2013-03-08	408-442	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	LOS GATOS	CA
2013-03-08	408-809	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNJS SOUTH	CA
2013-03-08	408-819	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CAMPBELL	CA
2013-03-08	408-909	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SAN MARTIN	CA
2013-03-08	414-204	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	MILWAUKZN1	WI
2013-03-08	431-281	not yet reported which blocks →	MTS Inc.	991B	Swan River	—
2013-03-08	431-641	not yet reported which blocks →	MTS Inc.	991B	Gimli	—
2013-03-08	434-439	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	LYNCHBURG	VA
2013-03-08	437-222	not yet reported which blocks →	Beanfield Technologies Inc.	575G	Toronto	—
2013-03-08	437-266	not yet reported which blocks →	Comwave Networks	160G	Toronto	—
2013-03-08	438-222	not yet reported which blocks →	Beanfield Technologies Inc.	575G	Montreal	—
2013-03-08	470-375	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	ATLANTA NE	GA

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.