Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2011-09-21	331-228	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	ST CHARLES	IL
2011-09-21	469-203	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	GRANDPRARI	TX
2011-09-21	469-206	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	DALLAS	TX
2011-09-21	469-208	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	CARROLLTON	TX
2011-09-21	469-209	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	PLANO	TX
2011-09-21	559-856	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SELMA	CA
2011-09-21	779-225	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	JOLIET	IL
2011-09-21	909-334	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	CHINO	CA
2011-09-20	226-786	not yet reported which blocks →	Iristel Inc.	154E	Stratford	—
2011-09-20	226-798	not yet reported which blocks →	Iristel Inc.	154E	Chatham	—
2011-09-20	305-501	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	KEYS	FL
2011-09-20	385-399	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	BOUNTIFUL	UT
2011-09-20	438-807	not yet reported which blocks →	Iristel Inc.	154E	Montreal	—
2011-09-20	480-845	0–9 XXXall 10 · 5 holders which blocks →	MCC TELEPHONY LLC	593K	PHOENIX	AZ
2011-09-20	513-302	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
2011-09-20	513-501	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
2011-09-20	613-902	not yet reported which blocks →	Iristel Inc.	154E	Belleville	—
2011-09-20	646-738	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	NWYRCYZN01	NY
2011-09-20	705-910	not yet reported which blocks →	Iristel Inc.	154E	Sault Ste. Marie	—
2011-09-20	720-625	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	DENVER	CO
2011-09-20	819-412	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2011-09-20	917-231	0–9 XXXall 10 · 4 holders which blocks →	YMAX COMMUNICATIONS CORP. - NY	282E	NWYRCYZN06	NY
2011-09-19	202-430	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC	6402	WSHNGTNZN1	DC
2011-09-19	385-242	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	SALT LAKE	UT
2011-09-19	401-346	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	PROVIDENCE	RI
2011-09-19	408-784	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SNJS SOUTH	CA
2011-09-19	435-319	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ST GEORGE	UT
2011-09-19	512-571	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	AUSTIN	TX
2011-09-19	581-726	not yet reported which blocks →	Fido Solutions Inc.	5643	Baie-Comeau (Hauterive)	—
2011-09-19	581-929	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Baie-Comeau (Hauterive)	—
2011-09-19	647-762	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2011-09-19	682-206	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	ARLINGTON	TX
2011-09-19	717-836	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	HARISBGZN1	PA
2011-09-19	757-805	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	NRFOLKZON2	VA
2011-09-19	830-302	0–9 XXXall 10 · 8 holders which blocks →	AT&T ENTERPRISES, LLC	516C	NEWBRANFLS	TX
2011-09-19	970-616	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	GREELEY	CO
2011-09-17	224-203	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	NORTHBROOK	IL
2011-09-16	214-865	0–9 XXXall 10 · 2 holders which blocks →	SOUTHWESTERN BELL	9533	DALLAS	TX
2011-09-16	289-455	not yet reported which blocks →	TELUS Mobility	8303	Grimsby	—
2011-09-16	305-417	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	KEYS	FL
2011-09-16	336-934	0–9 XXXall 10 · 4 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	WINSTN SAL	NC
2011-09-16	407-216	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - FL	937C	ORLANDO	FL
2011-09-16	438-806	not yet reported which blocks →	Iristel Inc.	154E	Montreal	—
2011-09-16	440-214	0–9 XXXall 10 · 7 holders which blocks →	WINDSTREAM WESTERN RESERVE, INC.	0666	CHARDON	OH
2011-09-16	440-261	0–9 XXXall 10 · 8 holders which blocks →	WINDSTREAM WESTERN RESERVE, INC.	0666	ASHTABULA	OH
2011-09-16	440-307	0–9 XXXall 10 · 6 holders which blocks →	WINDSTREAM WESTERN RESERVE, INC.	0666	MADISON	OH
2011-09-16	469-240	0–9 XXXall 10 · 7 holders which blocks →	SOUTHWESTERN BELL TELEPHONE COMPANY - TX	7726	LEWISVILLE	TX
2011-09-16	475-298	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	BRIDGEPORT	CT
2011-09-16	475-529	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	DANBURY	CT
2011-09-16	506-802	not yet reported which blocks →	Iristel Inc.	154E	Moncton	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.