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
2016-03-23	346-787	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - TX	903C	LA PORTE	TX
2016-03-23	361-330	0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WOODSBORO	TX
2016-03-23	407-885	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	ORLANDO	FL
2016-03-23	470-298	0–9 XXXall 10 · 3 holders which blocks →	PEERLESS NETWORK OF GEORGIA, LLC - GA	909E	ATLANTA	GA
2016-03-23	509-596	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	CLARKSTON	WA
2016-03-23	531-208	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NE	549E	ATKINSON	NE
2016-03-23	531-300	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	ONVOY, LLC - NE	549E	CRESTON	NE
2016-03-23	586-571	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLCV - MI	543C	CENTERLINE	MI
2016-03-23	587-514	not yet reported which blocks →	Distributel	081E	Champion	—
2016-03-23	587-515	not yet reported which blocks →	Distributel	081E	Cochrane	—
2016-03-23	587-517	not yet reported which blocks →	Distributel	081E	Cremona	—
2016-03-23	587-518	not yet reported which blocks →	Distributel	081E	Crossfield	—
2016-03-23	587-519	not yet reported which blocks →	Distributel	081E	Exshaw	—
2016-03-23	587-527	not yet reported which blocks →	Distributel	081E	Gleichen	—
2016-03-23	587-528	not yet reported which blocks →	Distributel	081E	High River	—
2016-03-23	587-529	not yet reported which blocks →	Distributel	081E	Hussar	—
2016-03-23	587-530	not yet reported which blocks →	Distributel	081E	Irricana	—
2016-03-23	587-531	not yet reported which blocks →	Distributel	081E	Kananaskis	—
2016-03-23	587-546	not yet reported which blocks →	Distributel	081E	Lake Louise	—
2016-03-23	587-547	not yet reported which blocks →	Distributel	081E	Langdon	—
2016-03-23	587-548	not yet reported which blocks →	Distributel	081E	Lomond	—
2016-03-23	587-549	not yet reported which blocks →	Distributel	081E	Longview	—
2016-03-23	587-550	not yet reported which blocks →	Distributel	081E	Milo	—
2016-03-23	587-558	not yet reported which blocks →	Distributel	081E	Morley	—
2016-03-23	587-559	not yet reported which blocks →	Distributel	081E	Nanton	—
2016-03-23	587-560	not yet reported which blocks →	Distributel	081E	Okotoks	—
2016-03-23	587-561	not yet reported which blocks →	Distributel	081E	Rockyford	—
2016-03-23	587-562	not yet reported which blocks →	Distributel	081E	Standard	—
2016-03-23	587-563	not yet reported which blocks →	Distributel	081E	Stavely	—
2016-03-23	587-564	not yet reported which blocks →	Distributel	081E	Strathmore	—
2016-03-23	587-565	not yet reported which blocks →	Distributel	081E	Turner Valley	—
2016-03-23	587-567	not yet reported which blocks →	Distributel	081E	Vulcan	—
2016-03-23	608-384	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC WI	7216	MINERAL PT	WI
2016-03-23	682-400	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	MANSFIELD	TX
2016-03-23	774-387	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MA	892D	BLACKSTONE	MA
2016-03-23	774-497	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - MA	892D	NO SWANSEA	MA
2016-03-23	779-223	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC	224C	ONARGA	IL
2016-03-23	786-494	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2016-03-23	804-206	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA	7238	DINWIDDIE	VA
2016-03-23	828-827	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NC	638E	CLAREMONT	NC
2016-03-23	850-204	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - FL	937C	HOLLEYNVRR	FL
2016-03-23	864-778	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - SC	548E	WALHALLA	SC
2016-03-23	907-204	0XXX1XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS	6563	KETCHIKAN	AK
2016-03-23	940-310	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - TX	903C	TIOGA	TX
2016-03-23	978-581	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MA	892D	ORANGE	MA
2016-03-22	220-270	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - OH	464C	CROTON	OH
2016-03-22	231-277	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLCV - MI	543C	FOUNTAIN	MI
2016-03-22	231-771	0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	ELK RAPIDS	MI
2016-03-22	254-278	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	COPPERASCV	TX
2016-03-22	515-750	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - IA	221F	DAWSON	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.