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
2016-03-28	501-424	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CABOT	AR
2016-03-28	507-422	0–9 XXXwhole prefix which blocks →	QWEST CORPORATION	9631	ROCHESTER	MN
2016-03-28	740-564	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	PATASKALA	OH
2016-03-28	830-218	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	LULING	TX
2016-03-28	864-734	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - SC	548E	SIX MILE	SC
2016-03-28	908-341	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - NJ	637C	CRANFORD	NJ
2016-03-28	949-377	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	IRVINE	CA
2016-03-28	951-407	0–9 XXXall 10 · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	CORONA	CA
2016-03-25	206-717	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - WA	483E	SEATTLE	WA
2016-03-25	267-542	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	PHLDLPHZN2	PA
2016-03-25	406-304	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	MISSOULA	MT
2016-03-25	470-302	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	CUMMING	GA
2016-03-25	480-407	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2016-03-25	602-461	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	PHOENIX	AZ
2016-03-25	646-689	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN01	NY
2016-03-25	762-214	0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA	7435	EASTANOLLE	GA
2016-03-25	916-963	0–9 XXXall 10 · 5 holders which blocks →	UTILITY TELECOM GROUP, LLC - CA	9262	FAIR OAKS	CA
2016-03-25	936-249	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - TX	903C	WILLIS	TX
2016-03-25	984-208	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - NC	638E	CARY	NC
2016-03-24	210-926	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SANANTONIO	TX
2016-03-24	214-430	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2016-03-24	224-747	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC	224C	HAMPSHIRE	IL
2016-03-24	224-904	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	NORTHBROOK	IL
2016-03-24	234-900	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	AKRON	OH
2016-03-24	236-600	not yet reported which blocks →	Iristel Inc.	154E	Vernon	—
2016-03-24	236-800	not yet reported which blocks →	Iristel Inc.	154E	Duncan	—
2016-03-24	272-212	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	STROUDSBG	PA
2016-03-24	317-746	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN	6725	INDIANAPLS	IN
2016-03-24	343-488	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Ottawa-Hull	—
2016-03-24	438-290	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Montreal	—
2016-03-24	506-974	not yet reported which blocks →	TELUS Integrated Communications	2782	Florenceville	—
2016-03-24	531-571	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - NE	549E	WAKEFIELD	NE
2016-03-24	587-200	not yet reported which blocks →	Iristel Inc.	154E	Sherwood Park	—
2016-03-24	587-917	not yet reported which blocks →	Videotron Ltd.	787G	Calgary	—
2016-03-24	587-974	not yet reported which blocks →	Videotron Ltd.	787G	Edmonton	—
2016-03-24	618-852	1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	NEWTON	IL
2016-03-24	639-631	not yet reported which blocks →	Distributel	081E	Regina	—
2016-03-24	647-245	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Toronto	—
2016-03-24	651-279	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	TWINCITIES	MN
2016-03-24	717-716	0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	MOUNTVILLE	PA
2016-03-24	765-375	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IN	097D	OXFORD	IN
2016-03-24	778-589	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Vancouver	—
2016-03-24	779-287	0XXX1XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC	224C	UNION	IL
2016-03-24	878-378	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - PA	547E	WESTNEWTON	PA
2016-03-24	878-847	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - PA	547E	NEWKNSNGTN	PA
2016-03-24	878-870	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - PA	547E	FARMINGTON	PA
2016-03-23	214-817	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	MIDLOTHIAN	TX
2016-03-23	216-716	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - OH	7532	CLEVELAND	OH
2016-03-23	318-668	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	OAKDALE	LA
2016-03-23	343-789	not yet reported which blocks →	Distributel	082E	Alfred	—

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.