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
2016-08-18	206-573	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	SEATTLE	WA
2016-08-18	206-646	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	SEATTLE	WA
2016-08-18	206-773	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	SEATTLE	WA
2016-08-18	248-861	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CLARKSTON	MI
2016-08-18	313-913	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	DETROITZN1	MI
2016-08-18	385-440	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	PLEASATGRV	UT
2016-08-18	501-435	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LITTLEROCK	AR
2016-08-18	501-443	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BENTON	AR
2016-08-18	516-591	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NASSAUZN05	NY
2016-08-18	571-799	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF VIRGINIA, LLC - VA	275G	LEESBURG	VA
2016-08-18	747-268	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	PSDN LACN	CA
2016-08-18	786-872	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	KEYS	FL
2016-08-18	805-572	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	OXNARD	CA
2016-08-18	865-505	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TN	124F	SEVIERVL	TN
2016-08-18	873-473	not yet reported which blocks →	ISP Telecom Inc.	4727	Amos	—
2016-08-18	873-474	not yet reported which blocks →	ISP Telecom Inc.	4727	La Sarre	—
2016-08-17	248-993	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	NORTHVILLE	MI
2016-08-17	336-502	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC	7835	HAYS	NC
2016-08-17	515-601	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
2016-08-17	587-816	not yet reported which blocks →	Iristel Inc.	154E	Brooks	—
2016-08-17	587-817	not yet reported which blocks →	Iristel Inc.	154E	Edson	—
2016-08-17	612-258	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	TWINCITIES	MN
2016-08-17	681-247	0–9 XXXall 10 · 8 holders which blocks →	SHENTEL COMMUNICATIONS, LLC. - WV	489F	MARTINSBG	WV
2016-08-17	873-479	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Jovite	—
2016-08-17	941-242	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	BRADENTON	FL
2016-08-16	236-700	not yet reported which blocks →	Iristel Inc.	154E	Penticton	—
2016-08-16	236-836	not yet reported which blocks →	Iristel Inc.	154E	Salmon Arm	—
2016-08-16	272-770	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - PA	547E	SCRANTON	PA
2016-08-16	438-344	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2016-08-16	479-402	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BENTONVL	AR
2016-08-16	479-407	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ALMA	AR
2016-08-16	505-595	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2016-08-16	614-977	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	CANALWHSTR	OH
2016-08-16	667-800	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	SALISBURY	MD
2016-08-16	702-886	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	LAS VEGAS	NV
2016-08-16	720-531	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	DENVER	CO
2016-08-16	814-800	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - PA	547E	ALTOONA	PA
2016-08-16	814-851	2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks →	WINDSTREAM PENNSYLVANIA, INC.	0176	SHEFFIELD	PA
2016-08-16	843-951	0–9 XXXall 10 · 5 holders which blocks →	BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL	9417	HARTSVILLE	SC
2016-08-15	209-592	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LOS BANOS	CA
2016-08-15	213-238	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	LSAN DA 01	CA
2016-08-15	248-466	0–9 XXXall 10 · 4 holders which blocks →	VONAGE AMERICA LLC	197D	PONTIAC	MI
2016-08-15	254-417	0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW	1181	WHITNEY	TX
2016-08-15	442-327	0–9 XXXall 10 · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	VICTORVL	CA
2016-08-15	458-256	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OR	076F	BEND	OR
2016-08-15	480-476	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-08-15	518-816	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	ALBANY	NY
2016-08-15	570-393	0–9 XXXall 10 · 7 holders which blocks →	WINDSTREAM PENNSYLVANIA, INC.	0176	LANSFORD	PA
2016-08-15	585-404	0–9 XXXall 10 · 7 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HENRIETTA	NY
2016-08-15	606-428	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL KENTUCKY LICENSES, INC.	365C	WILLIAMSBG	KY

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.