Recent prefix assignments

4 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 945

TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1

ONVOY, LLC - TX 1

NEW CINGULAR WIRELESS PCS, LLC - IL 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
2023-02-28	945-290	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2023-01-30	945-289	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FRISCO	TX
2023-01-26	945-677	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	PROSPER	TX
2023-01-26	945-678	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	MCKINNEY	TX
2023-01-25	945-945	0–9 XXXall 10 · 3 holders which blocks →	USFON, INC. - TX	473F	DALLAS	TX
2023-01-20	945-287	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	PLANO	TX
2023-01-20	945-288	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	IRVING	TX
2023-01-18	945-286	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2023-01-13	945-445	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	PRINCETON	TX
2023-01-11	945-285	0–9 XXXall 10 · 4 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	KAUFMAN	TX
2023-01-11	945-405	4XXX which blocks →	ONVOY, LLC - TX	903C	ITALY	TX
2023-01-11	945-425	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	LEWISVILLE	TX
2023-01-11	945-523	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	CARROLLTON	TX
2023-01-03	945-284	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PLANO	TX
2022-12-15	945-283	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2022-11-23	945-282	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	DALLAS	TX
2022-11-16	945-281	0XXX1XXX2XXX9XXX · 4 holders which blocks →	ONVOY, LLC - TX	903C	JOSEPHINE	TX
2022-11-16	945-544	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	FRISCO	TX
2022-11-15	945-942	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	PLANO	TX
2022-11-08	945-280	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MCKINNEY	TX
2022-11-02	945-279	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	DALLAS	TX
2022-10-24	945-278	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	FRISCO	TX
2022-10-12	945-275	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2022-10-12	945-276	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	MCKINNEY	TX
2022-10-06	945-272	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-10-06	945-273	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-10-06	945-274	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	MCKINNEY	TX
2022-10-05	945-271	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	WAXAHACHIE	TX
2022-09-16	945-270	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	LEWISVILLE	TX
2022-08-26	945-269	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2022-08-25	945-267	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2022-08-25	945-268	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2022-08-09	945-264	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-09	945-265	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-09	945-266	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2022-08-05	945-263	3XXX9XXX · 2 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	BARDWELL	TX
2022-08-02	945-251	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDPRARI	TX
2022-07-05	945-262	0–9 XXXall 10 · 3 holders which blocks →	TRUSTID, INC.	896J	DALLAS	TX
2022-07-01	945-260	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	FRISCO	TX
2022-07-01	945-261	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	GRANDPRARI	TX
2022-05-25	945-259	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	WAXAHACHIE	TX
2022-05-24	945-256	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	ALLEN	TX
2022-05-24	945-258	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	DALLAS	TX
2022-05-13	945-257	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	FRISCO	TX
2022-05-04	945-254	0–9 XXXwhole prefix which blocks →	ONVOY SPECTRUM, LLC	624H	PLANO	TX
2022-04-08	945-252	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	PLANO	TX
2022-04-08	945-253	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	PLANO	TX
2022-03-18	945-249	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FRISCO	TX
2022-03-18	945-250	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LEWISVILLE	TX
2022-03-03	945-495	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TX	903C	PROSPER	TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.