Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21

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
2013-02-14	646-663	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN01	NY
2013-02-14	657-218	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	SANTA ANA	CA
2013-02-14	657-220	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ANAHEIM	CA
2013-02-14	818-616	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	VAN NUYS	CA
2013-02-13	210-718	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SANANTONIO	TX
2013-02-13	256-808	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	HUNTSVILLE	AL
2013-02-13	385-224	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	PROVO	UT
2013-02-13	385-329	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	PROVO	UT
2013-02-13	385-335	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	PROVO	UT
2013-02-13	484-704	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	PHPHSBZN30	PA
2013-02-13	513-630	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	LTL MIAMI	OH
2013-02-13	531-333	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	LINCOLN	NE
2013-02-13	803-602	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	COLUMBIA	SC
2013-02-13	920-399	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PLTC, LLC - WI	375F	OCONTO FLS	WI
2013-02-13	928-723	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - AZ	630E	YUMA	AZ
2013-02-12	226-545	not yet reported which blocks →	Bell Mobility	6574	Aylmer	—
2013-02-12	289-912	not yet reported which blocks →	Comwave Networks	160G	Port Perry	—
2013-02-12	289-913	not yet reported which blocks →	Comwave Networks	160G	Ajax-Pickering	—
2013-02-12	289-915	not yet reported which blocks →	Comwave Networks	160G	South Pickering	—
2013-02-12	385-228	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2013-02-12	385-315	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2013-02-12	385-321	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2013-02-12	404-998	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2013-02-12	431-229	not yet reported which blocks →	MTS Inc.	991B	The Pas	—
2013-02-12	431-230	not yet reported which blocks →	MTS Inc.	991B	Cross Lake	—
2013-02-12	440-910	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	HILLCREST	OH
2013-02-12	609-832	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MOUNTHOLLY	NJ
2013-02-12	865-320	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	551G	KNOXVILLE	TN
2013-02-12	901-440	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	MEMPHIS	TN
2013-02-11	239-228	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	NAPLES	FL
2013-02-11	269-218	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	GALESBURG	MI
2013-02-11	276-832	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	JONESVILLE	VA
2013-02-11	323-538	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LSAN DA 06	CA
2013-02-11	331-302	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	AURORA	IL
2013-02-11	385-214	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2013-02-11	424-293	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	W ANGELES	CA
2013-02-11	440-620	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	HILLCREST	OH
2013-02-11	657-221	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	ORANGE	CA
2013-02-11	802-495	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	BURLINGTON	VT
2013-02-11	804-294	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	KNGANDQUEN	VA
2013-02-11	859-337	0XXX1XXX7XXX · 3 holders which blocks →	NUSO, LLC	551G	WINCHESTER	KY
2013-02-11	872-240	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN03	IL
2013-02-11	903-417	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	NEW BOSTON	TX
2013-02-11	909-361	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	S BERNDINO	CA
2013-02-11	978-770	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	LOWELL	MA
2013-02-08	204-506	not yet reported which blocks →	TELUS Integrated Communications	2782	Oakbank	—
2013-02-08	204-516	not yet reported which blocks →	TELUS Integrated Communications	2782	Macgregor	—
2013-02-08	207-360	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ME	7777	WELLS	ME
2013-02-08	210-802	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SANANTONIO	TX
2013-02-08	225-424	0–9 XXXall 10 · 4 holders which blocks →	TELEPAK NETWORKS, INC. - LA	908A	BATONROUGE	LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.