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
2016-01-07	709-401	not yet reported which blocks →	Iristel Inc.	154E	Torbay	—
2016-01-07	778-763	not yet reported which blocks →	Iristel Inc.	154E	Prince George	—
2016-01-06	240-657	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	FROSTBURG	MD
2016-01-06	360-745	0–9 XXXall 10 · 5 holders which blocks →	QWEST CORPORATION	9638	PORTLUDLOW	WA
2016-01-06	469-562	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PLANO	TX
2016-01-06	612-469	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TWINCITIES	MN
2016-01-06	647-671	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-673	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-674	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-675	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-676	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-679	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	647-685	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-01-06	717-678	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	HARISBGZN1	PA
2016-01-05	262-202	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	MILWAUKZN2	WI
2016-01-05	262-747	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - WI	225C	UNIONGROVE	WI
2016-01-05	270-560	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - KY	896E	OAK GROVE	KY
2016-01-05	346-252	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	HSTNSUBURB	TX
2016-01-05	424-452	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	REDONDO	CA
2016-01-05	475-283	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	NORWALK	CT
2016-01-05	478-707	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - GA	067D	SANDERSVL	GA
2016-01-05	567-804	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	TIFFIN	OH
2016-01-05	585-774	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC- NY	384C	ALBION	NY
2016-01-05	607-302	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	ELMIRA	NY
2016-01-05	619-763	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	CHULAVISTA	CA
2016-01-05	636-409	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	OFALLON	MO
2016-01-05	636-747	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	PACIFIC	MO
2016-01-05	660-717	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	MARSHALL	MO
2016-01-05	774-775	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks →	ONVOY, LLC - MA	892D	WAREHAM	MA
2016-01-05	786-843	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MIAMI	FL
2016-01-05	805-209	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	ONVOY, LLC - CA	649C	MOORPARK	CA
2016-01-05	805-834	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	OXNARD	CA
2016-01-05	864-727	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF SOUTH CAROLINA, LLC - SC	098H	COWPENS	SC
2016-01-05	910-636	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC	350F	CAROLINBCH	NC
2016-01-05	914-704	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	WSCHSTZN02	NY
2016-01-05	920-880	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF WISCONSIN, LLC - WI	227F	ALGOMA	WI
2016-01-05	929-213	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN03	NY
2016-01-05	929-215	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN10	NY
2016-01-05	937-980	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF OHIO, LLC - OH	284F	TROY	OH
2016-01-05	970-747	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - CO	026D	FORTMORGAN	CO
2016-01-04	229-598	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - GA	067D	GEORGETOWN	GA
2016-01-04	267-710	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - PA	547E	PHLDLPHZN4	PA
2016-01-04	304-427	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HILLSBORO	WV
2016-01-04	306-914	not yet reported which blocks →	Bell Mobility	6574	Saskatoon	—
2016-01-04	331-775	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	DOWNERSGRV	IL
2016-01-04	385-389	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	OGDEN	UT
2016-01-04	423-803	0–9 XXXall 10 · 3 holders which blocks →	ELECTRIC POWER BOARD OF CHATTANOOGA	4645	CHATTNOOGA	TN
2016-01-04	431-847	not yet reported which blocks →	Bell Mobility	6574	Winnipeg	—
2016-01-04	438-847	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2016-01-04	479-777	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - AR	348F	MENA	AR

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.