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
2016-01-29	650-770	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	LOS ALTOS	CA
2016-01-29	705-710	not yet reported which blocks →	Iristel Inc.	154E	Gravenhurst	—
2016-01-29	709-500	not yet reported which blocks →	Iristel Inc.	154E	St. Alban's	—
2016-01-29	856-212	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - NJ	637C	VINELAND	NJ
2016-01-29	856-272	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NJ	637C	WOODBURY	NJ
2016-01-29	857-274	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2016-01-29	857-279	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NEWTON	MA
2016-01-29	858-757	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	SNDG MRMS	CA
2016-01-29	867-362	not yet reported which blocks →	Bell Mobility	6574	Beaver Creek	—
2016-01-29	902-905	not yet reported which blocks →	Iristel Inc.	154E	Alberton	—
2016-01-29	978-955	0–9 XXXall 10 · 5 holders which blocks →	TC SYSTEMS, INC.	7135	LOWELL	MA
2016-01-29	979-275	not yet reported which blocks →	YK COMMUNICATIONS, LTD - TX	634H	EL CAMPO	TX
2016-01-28	226-449	not yet reported which blocks →	Fibernetics Corporation	464D	Fergus	—
2016-01-28	226-542	not yet reported which blocks →	Bell Mobility	6574	Chatham	—
2016-01-28	226-543	not yet reported which blocks →	Bell Mobility	6574	Goderich	—
2016-01-28	236-317	not yet reported which blocks →	Distributel	081E	Vancouver	—
2016-01-28	249-328	not yet reported which blocks →	Bell Mobility	6574	North Bay	—
2016-01-28	343-542	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2016-01-28	343-544	not yet reported which blocks →	Bell Mobility	6574	Pembroke	—
2016-01-28	365-275	not yet reported which blocks →	Bell Mobility	6574	Ajax-Pickering	—
2016-01-28	385-331	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	AMERCNFORK	UT
2016-01-28	437-317	not yet reported which blocks →	Distributel	082E	Toronto	—
2016-01-28	438-316	not yet reported which blocks →	Distributel	083E	Montreal	—
2016-01-28	475-228	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	ANSONIDRBY	CT
2016-01-28	475-331	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	NEW HAVEN	CT
2016-01-28	480-781	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2016-01-28	505-355	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM	7464	ALBUQURQUE	NM
2016-01-28	531-212	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE	5807	OAKLAND	NE
2016-01-28	540-779	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - VA	138E	STAFFORD	VA
2016-01-28	575-659	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM	7464	LOVINGTON	NM
2016-01-28	579-377	not yet reported which blocks →	Fibernetics Corporation	464D	Joliette	—
2016-01-28	579-378	not yet reported which blocks →	Fibernetics Corporation	464D	Ste-Therese	—
2016-01-28	581-447	not yet reported which blocks →	Bell Mobility	6574	Chicoutimi	—
2016-01-28	586-297	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CENTERLINE	MI
2016-01-28	602-875	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2016-01-28	619-305	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	CHULAVISTA	CA
2016-01-28	620-299	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF KANSAS, LLC - KS	018H	HUMBOLDT	KS
2016-01-28	734-228	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PLYMOUTH	MI
2016-01-28	860-300	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	NORWICH	CT
2016-01-28	873-220	not yet reported which blocks →	Distributel	083E	Trois-Rivieres	—
2016-01-28	984-207	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - NC	638E	GOLDSBORO	NC
2016-01-27	252-351	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	GREENVILLE	NC
2016-01-27	343-998	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2016-01-27	343-999	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2016-01-27	365-404	not yet reported which blocks →	Distributel	082E	Newcastle	—
2016-01-27	365-405	not yet reported which blocks →	Distributel	082E	Newtonville	—
2016-01-27	365-406	not yet reported which blocks →	Distributel	082E	Orono	—
2016-01-27	365-407	not yet reported which blocks →	Distributel	082E	Port Perry	—
2016-01-27	365-408	not yet reported which blocks →	Distributel	082E	Blackstock	—
2016-01-27	365-777	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Oakville	—

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.