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
2016-03-22	520-597	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - AZ	630E	SUPERIOR	AZ
2016-03-22	570-979	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WILLIAMSPT	PA
2016-03-22	574-319	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - IN	097D	TWELVEMILE	IN
2016-03-22	575-727	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - NM	206F	BAYARD	NM
2016-03-22	575-735	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - NM	206F	CIMARRON	NM
2016-03-22	587-502	not yet reported which blocks →	Distributel	081E	Acme	—
2016-03-22	587-503	not yet reported which blocks →	Distributel	081E	Airdrie	—
2016-03-22	587-504	not yet reported which blocks →	Distributel	081E	Arrowwood	—
2016-03-22	587-505	not yet reported which blocks →	Distributel	081E	Banff	—
2016-03-22	587-506	not yet reported which blocks →	Distributel	081E	Beiseker	—
2016-03-22	587-508	not yet reported which blocks →	Distributel	081E	Blackie	—
2016-03-22	587-509	not yet reported which blocks →	Distributel	081E	Bragg Creek	—
2016-03-22	587-510	not yet reported which blocks →	Distributel	081E	Canmore	—
2016-03-22	587-512	not yet reported which blocks →	Distributel	081E	Carstairs	—
2016-03-22	587-513	not yet reported which blocks →	Distributel	081E	Cayley	—
2016-03-22	623-213	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	PHOENIX	AZ
2016-03-22	657-313	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	SANTA ANA	CA
2016-03-22	657-377	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	GARDEN GRV	CA
2016-03-22	712-530	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - IA	221F	EMERSON	IA
2016-03-22	731-497	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - TN	525E	RIDGELY	TN
2016-03-22	812-561	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IN	097D	JASONVILLE	IN
2016-03-22	848-277	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - NJ	637C	SEASIDE PK	NJ
2016-03-22	863-220	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	LAKELAND	FL
2016-03-22	939-222	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	PONCE	PR
2016-03-22	949-339	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	LAGUNA BCH	CA
2016-03-22	985-239	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	MT HERMON	LA
2016-03-21	431-280	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Minitonas	—
2016-03-21	442-203	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	BRIDGEPORT	CA
2016-03-21	475-230	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CT	7143	NEW HAVEN	CT
2016-03-21	502-306	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - KY	896E	PORT ROYAL	KY
2016-03-21	506-975	not yet reported which blocks →	TELUS Integrated Communications	2782	Oromocto	—
2016-03-21	531-355	0–9 XXXwhole prefix which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	OMAHA	NE
2016-03-21	579-205	not yet reported which blocks →	TELUS Quebec	2243	Yamaska	—
2016-03-21	579-206	not yet reported which blocks →	TELUS Quebec	2243	Pierreville	—
2016-03-21	579-207	not yet reported which blocks →	TELUS Quebec	2243	St-Barthelemy	—
2016-03-21	579-208	not yet reported which blocks →	TELUS Quebec	2243	Berthierville	—
2016-03-21	579-209	not yet reported which blocks →	TELUS Quebec	2243	Farnham	—
2016-03-21	647-805	not yet reported which blocks →	Distributel	082E	Toronto	—
2016-03-21	662-780	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - MS	719E	ASHLAND	MS
2016-03-21	701-807	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - ND	452F	LARIMORE	ND
2016-03-21	805-261	0–9 XXXall 10 · 8 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	SIMIVALLEY	CA
2016-03-21	805-342	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OXNARD	CA
2016-03-21	878-206	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - PA	547E	FAIRCHANCE	PA
2016-03-21	910-415	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NC	638E	FAIRMONT	NC
2016-03-21	980-261	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	BADIN	NC
2016-03-18	315-830	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	NEWARK	NY
2016-03-18	337-243	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	CENTERVL	LA
2016-03-18	337-420	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - LA	749E	BALDWIN	LA
2016-03-18	430-220	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - TX	903C	BRASHEAR	TX
2016-03-18	430-223	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - TX	903C	PICKTON	TX

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.