Recent prefix assignments

6 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 346

ONVOY, LLC - TX 4

PAETEC ITEL, LLC 1

8X8, INC. 1

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
2022-08-25	346-584	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	FRIENDSWD	TX
2022-08-25	346-585	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	STAFFORD	TX
2022-08-24	346-582	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2022-08-24	346-583	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2022-08-19	346-581	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SPRING	TX
2022-08-17	346-580	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CYPRESS	TX
2022-08-12	346-579	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	DICKINSON	TX
2022-08-09	346-578	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LANGHAMCRK	TX
2022-07-20	346-575	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	HSTNSUBURB	TX
2022-07-15	346-574	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SPRING	TX
2022-07-13	346-573	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	CYPRESS	TX
2022-07-01	346-568	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	LANGHAMCRK	TX
2022-07-01	346-569	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SATSUMA	TX
2022-07-01	346-572	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	TOMBALL	TX
2022-06-29	346-564	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2022-06-29	346-565	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2022-06-28	346-562	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2022-06-28	346-563	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2022-06-22	346-560	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	HOUSTON	TX
2022-06-21	346-559	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HUMBLE	TX
2022-05-27	346-558	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	RICHMNRNBG	TX
2022-05-24	346-556	0–9 XXXall 10 · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	HOUSTON	TX
2022-05-24	346-557	0–9 XXXall 10 · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	HSTNSUBURB	TX
2022-04-12	346-554	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	HOUSTON	TX
2022-04-05	346-553	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	HOUSTON	TX
2022-03-24	346-626	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	SUGAR LAND	TX
2022-03-16	346-552	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	ALVIN	TX
2022-03-11	346-551	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BAMMEL	TX
2022-02-09	346-743	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	BARKER	TX
2022-02-07	346-548	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	BAYTOWN	TX
2022-02-07	346-550	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	CYPRESS	TX
2022-02-01	346-822	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	HSTNSUBURB	TX
2022-02-01	346-833	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	HOUSTON	TX
2022-01-27	346-547	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	HOUSTON	TX
2022-01-26	346-549	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAYTOWN	TX
2022-01-25	346-546	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	LANGHAMCRK	TX
2022-01-19	346-545	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	RICHMNRNBG	TX
2022-01-18	346-544	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	CYPRESS	TX
2022-01-14	346-541	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2022-01-14	346-543	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2022-01-14	346-624	0–9 XXXall 10 · 2 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	LANGHAMCRK	TX
2022-01-14	346-637	0–9 XXXall 10 · 3 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	KATY	TX
2022-01-14	346-647	4XXX5XXX · 2 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	MISSOURICY	TX
2022-01-14	346-782	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	PORTER	TX
2022-01-10	346-639	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	HSTNSUBURB	TX
2022-01-07	346-837	0–9 XXXall 10 · 2 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	BAMMEL	TX
2022-01-06	346-538	0–9 XXXall 10 · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	RICHMNRNBG	TX
2022-01-06	346-539	0–9 XXXall 10 · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	CYPRESS	TX
2022-01-06	346-540	0–9 XXXall 10 · 6 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	SPLENDORA	TX
2022-01-05	346-542	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HOUSTON	TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.