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
2022-09-20	949-731	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	NEWPORTBCH	CA
2022-09-19	276-283	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF VIRGINIA, LLC - VA	275G	WYTHEVILLE	VA
2022-09-19	312-910	0–9 XXXwhole prefix which blocks →	ONVOY, LLC	224C	CHICGOZN01	IL
2022-09-19	341-220	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	OKLD MN-PD	CA
2022-09-19	826-209	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NEWPORT	VA
2022-09-19	971-437	0XXX4XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CANBYNEEDY	OR
2022-09-16	213-684	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	LSAN DA 09	CA
2022-09-16	225-495	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA	6505	BATONROUGE	LA
2022-09-16	229-487	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	THOMASVL	GA
2022-09-16	269-398	9XXX which blocks →	AT&T - LOCAL	7421	THREE OAKS	MI
2022-09-16	309-916	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PEORIA	IL
2022-09-16	319-508	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	KEOSAUQUA	IA
2022-09-16	332-867	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	NWYRCYZN01	NY
2022-09-16	346-589	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SPRING	TX
2022-09-16	424-484	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CA	649C	TORRANCE	CA
2022-09-16	445-867	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	COMMIO, LLC	939H	LANSDALE	PA
2022-09-16	515-415	0–9 XXXall 10 · 5 holders which blocks →	COMMIO, LLC	939H	DES MOINES	IA
2022-09-16	515-916	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	AMES	IA
2022-09-16	516-956	0–9 XXXall 10 · 4 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NASSAUZN05	NY
2022-09-16	531-294	0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	NEBRASKACY	NE
2022-09-16	557-888	0–9 XXXall 10 · 2 holders which blocks →	TERRA NOVA TELECOM INC.	145J	KIRKWOOD	MO
2022-09-16	557-999	0–9 XXXall 10 · 6 holders which blocks →	WIRETAP TELECOM, LLC.	733J	SAPPINGTON	MO
2022-09-16	672-200	not yet reported which blocks →	Videotron Ltd.	787G	Vancouver	—
2022-09-16	681-447	2XXX which blocks →	ARMSTRONG TELECOMMUNICATIONS, INC. - WV	423C	CAIRO	WV
2022-09-16	720-954	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	FORTLUPTON	CO
2022-09-16	825-454	not yet reported which blocks →	Videotron Ltd.	787G	Calgary	—
2022-09-16	825-758	not yet reported which blocks →	Iristel Inc.	154E	Vulcan	—
2022-09-16	825-949	not yet reported which blocks →	Iristel Inc.	154E	Spirit River	—
2022-09-16	854-233	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	MYRTLE BCH	SC
2022-09-16	873-682	not yet reported which blocks →	Videotron Ltd.	328F	Sherbrooke	—
2022-09-16	901-686	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	MEMPHIS	TN
2022-09-16	945-270	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	LEWISVILLE	TX
2022-09-15	385-486	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	732J	BOUNTIFUL	UT
2022-09-15	438-365	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2022-09-15	438-366	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2022-09-15	463-388	0–9 XXXall 10 · 4 holders which blocks →	COMMIO, LLC	939H	CARMEL	IN
2022-09-15	520-659	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	732J	NOGALES	AZ
2022-09-15	628-321	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	628-322	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	628-323	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	628-324	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	628-325	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	628-326	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNFC CNTRL	CA
2022-09-15	651-551	0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks →	COMMIO, LLC	939H	STILLWATER	MN
2022-09-15	667-566	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	COMMIO, LLC	939H	STEVENSVL	MD
2022-09-15	667-877	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	PIKESVILLE	MD
2022-09-15	772-867	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	PTST LUCIE	FL
2022-09-15	825-757	not yet reported which blocks →	Iristel Inc.	154E	Veteran	—
2022-09-15	872-319	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN04	IL
2022-09-15	959-238	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	732J	PUTNAM	CT

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.