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
2011-09-16	561-231	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	WPALMBEACH	FL
2011-09-16	581-702	not yet reported which blocks →	Iristel Inc.	154E	Quebec	—
2011-09-16	779-210	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ROCKFORD	IL
2011-09-16	802-798	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	STOWE	VT
2011-09-16	910-747	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	CLINTON	NC
2011-09-16	954-210	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	FTLAUDERDL	FL
2011-09-16	980-298	0–9 XXXall 10 · 3 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	CHARLOTTE	NC
2011-09-16	980-636	0–9 XXXall 10 · 2 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	CHARLOTTE	NC
2011-09-15	207-254	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks →	OXFORD CNTY TELEPHONE SVC CO, DBA OXFORD NETWRKS	5205	HOULTON	ME
2011-09-15	276-455	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	COEBURN	VA
2011-09-15	317-478	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	INDIANAPLS	IN
2011-09-15	402-809	0–9 XXXall 10 · 5 holders which blocks →	UNITED STATES CELLULAR - NE	6263	SCHUYLER	NE
2011-09-15	434-319	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	LYNCHBURG	VA
2011-09-15	469-440	0–9 XXXall 10 · 7 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	PLANO	TX
2011-09-15	510-254	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	OKLD ALMD	CA
2011-09-15	540-685	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ROANOKE	VA
2011-09-15	567-287	0–9 XXXall 10 · 8 holders which blocks →	WINDSTREAM OHIO, LLC	0665	DELTA	OH
2011-09-15	567-305	0–9 XXXall 10 · 5 holders which blocks →	WINDSTREAM OHIO, LLC	0665	KENTON	OH
2011-09-15	571-367	0–9 XXXall 10 · 8 holders which blocks →	VERIZON SOUTH, INC. - VA (CONTEL)	0233	ARCOLA	VA
2011-09-15	646-547	0–9 XXXall 10 · 4 holders which blocks →	TELENGY L.L.C. - NY	473G	NWYRCYZN01	NY
2011-09-15	682-212	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL TELEPHONE COMPANY - TX	7726	KELLER	TX
2011-09-15	808-492	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI	6516	HONOLULU	HI
2011-09-15	864-305	0–9 XXXall 10 · 4 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	ANDERSON	SC
2011-09-15	913-213	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KANSASCITY	KS
2011-09-15	919-437	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	KENLY	NC
2011-09-14	209-407	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	TRACY	CA
2011-09-14	305-330	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF FLORIDA, LLC - FL	902E	KEYS	FL
2011-09-14	404-804	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2011-09-14	405-482	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	OKLA CITY	OK
2011-09-14	406-813	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BELGRADE	MT
2011-09-14	470-226	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NE	GA
2011-09-14	478-353	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	DUBLIN	GA
2011-09-14	604-262	not yet reported which blocks →	Iristel Inc.	154E	Vancouver	—
2011-09-14	613-702	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2011-09-14	647-362	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2011-09-14	813-324	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	TAMPAEST	FL
2011-09-14	902-701	not yet reported which blocks →	Iristel Inc.	154E	Halifax	—
2011-09-14	918-210	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	TULSA	OK
2011-09-14	980-278	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	WADESBORO	NC
2011-09-14	980-404	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	SHELBY	NC
2011-09-13	201-273	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	JERSEYCITY	NJ
2011-09-13	208-957	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BOISE	ID
2011-09-13	210-305	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	SANANTONIO	TX
2011-09-13	224-254	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DESPLAINES	IL
2011-09-13	256-284	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AL	072F	FLORENCE	AL
2011-09-13	289-698	not yet reported which blocks →	TELUS Mobility	8303	Hamilton	—
2011-09-13	312-273	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN01	IL
2011-09-13	331-256	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	AURORA	IL
2011-09-13	336-904	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	KERNERSVL	NC
2011-09-13	408-620	0–9 XXXall 10 · 8 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	SNJS SOUTH	CA

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.