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
2005-03-08	716-359	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BUFFALO	NY
2005-03-08	773-885	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN03	IL
2005-03-08	785-639	not yet reported which blocks →	NEX-TECH WIRELESS, LLC	122D	HAYS	KS
2005-03-08	870-784	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR	6805	DE QUEEN	AR
2005-03-08	937-697	0–9 XXXall 10 · 9 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	CEDARVILLE	OH
2005-03-08	937-714	2XXX3XXX7XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	UNION CITY	OH
2005-03-07	213-454	0–9 XXXall 10 · 4 holders which blocks →	UTILITY TELECOM GROUP, LLC - CA	9262	LSAN DA 01	CA
2005-03-07	450-596	not yet reported which blocks →	Videotron Ltd.	8306	Oka	—
2005-03-07	450-597	not yet reported which blocks →	Videotron Ltd.	8306	Mirabel-St-Augustin	—
2005-03-07	450-814	not yet reported which blocks →	Videotron Ltd.	8306	Dunham	—
2005-03-07	450-816	not yet reported which blocks →	Videotron Ltd.	8306	St-Cesaire	—
2005-03-07	450-817	not yet reported which blocks →	Videotron Ltd.	8306	St-Paul-D'Abbotsford	—
2005-03-07	617-595	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2005-03-07	650-676	0–9 XXXall 10 · 4 holders which blocks →	UTILITY TELECOM GROUP, LLC - CA	9262	SSNFRNCSCO	CA
2005-03-07	845-741	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	MIDDLETOWN	NY
2005-03-04	269-464	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	WH PIGEON	MI
2005-03-04	361-636	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	METROPCS, INC.	5562	FREER	TX
2005-03-04	910-558	0XXX1XXX9XXX which blocks →	BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL	9417	WILMINGTON	NC
2005-03-04	915-333	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	FT HANCOCK	TX
2005-03-04	937-817	0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	CHRISTISBG	OH
2005-03-04	947-202	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-288	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-313	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-399	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-428	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-566	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-678	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-755	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-862	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-04	947-956	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ORTONVILLE	MI
2005-03-03	417-379	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	SPRINGFLD	MO
2005-03-03	417-505	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WESTPLAINS	MO
2005-03-03	450-815	not yet reported which blocks →	Videotron Ltd.	8306	Cowansville	—
2005-03-03	502-383	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - KY	4369	CHAPLIN	KY
2005-03-03	514-314	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	8377	Montreal	—
2005-03-03	519-506	not yet reported which blocks →	Wightman Communications Ltd.	138D	Hanover	—
2005-03-03	519-507	not yet reported which blocks →	Wightman Communications Ltd.	138D	Walkerton	—
2005-03-03	519-508	not yet reported which blocks →	Wightman Communications Ltd.	138D	Stratford	—
2005-03-03	519-509	not yet reported which blocks →	Wightman Communications Ltd.	138D	Mount Forest	—
2005-03-03	519-510	not yet reported which blocks →	Wightman Communications Ltd.	138D	Harriston	—
2005-03-03	573-838	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SIKESTON	MO
2005-03-03	601-862	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	JACKSON	MS
2005-03-03	859-208	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	FORD	KY
2005-03-03	973-419	0–9 XXXall 10 · 7 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	ORANGE	NJ
2005-03-02	219-750	0–9 XXXall 10 · 3 holders which blocks →	MIDWEST TELECOM OF AMERICA, INC. - IN	919A	MERRILLVL	IN
2005-03-02	224-345	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARLIGTNHTS	IL
2005-03-02	251-616	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AL	5255	CLEAR SPG	AL
2005-03-02	260-527	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	FREMONT	IN
2005-03-02	630-765	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WHEATON	IL
2005-03-02	708-336	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	TINLEYPARK	IL

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.