Recent prefix assignments

1 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 480

TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 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
2019-12-19	480-690	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2019-10-24	480-601	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2019-09-18	480-660	0–9 XXXall 10 · 3 holders which blocks →	EXIANT COMMUNICATIONS LLC	114J	PHOENIX	AZ
2019-09-13	480-594	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2019-09-13	480-955	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	PHOENIX	AZ
2019-08-23	480-573	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2019-08-19	480-637	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AZ	7217	PHOENIX	AZ
2019-08-12	480-581	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2019-07-22	480-597	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	PHOENIX	AZ
2019-07-15	480-574	0–9 XXXwhole prefix which blocks →	QWEST CORPORATION	9636	PHOENIX	AZ
2019-06-25	480-572	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	PHOENIX	AZ
2019-06-20	480-564	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2019-06-20	480-578	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2019-05-30	480-591	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AZ	587F	PHOENIX	AZ
2019-04-11	480-937	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AZ	587F	PHOENIX	AZ
2019-03-22	480-561	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2019-03-20	480-605	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2019-01-22	480-651	0–9 XXXall 10 · 4 holders which blocks →	QWEST CORPORATION	9636	PHOENIX	AZ
2019-01-18	480-549	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2019-01-14	480-546	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	PHOENIX	AZ
2019-01-09	480-590	0–9 XXXwhole prefix which blocks →	COMCAST IP PHONE, LLC	318J	PHOENIX	AZ
2018-11-05	480-569	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2018-11-01	480-542	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2018-09-25	480-536	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2018-09-12	480-877	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AZ	7217	PHOENIX	AZ
2018-08-24	480-531	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2018-08-15	480-530	0–9 XXXall 10 · 5 holders which blocks →	VOIP INNOVATIONS, LLC	597F	PHOENIX	AZ
2018-08-10	480-514	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AZ	7217	PHOENIX	AZ
2018-07-11	480-506	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2018-06-01	480-881	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2018-05-16	480-880	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2018-05-15	480-977	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2018-05-11	480-687	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2018-05-11	480-936	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	PHOENIX	AZ
2018-05-09	480-770	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AZ	587F	PHOENIX	AZ
2018-03-28	480-408	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2018-03-28	480-504	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2018-03-08	480-925	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2018-02-09	480-645	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2018-01-25	480-676	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2017-11-14	480-795	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	PHOENIX	AZ
2017-11-08	480-501	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2017-10-10	480-210	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2017-09-15	480-702	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	PHOENIX	AZ
2017-08-18	480-653	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2017-08-18	480-681	0–9 XXXall 10 · 3 holders which blocks →	TELNYX LLC	073H	PHOENIX	AZ
2017-08-18	480-909	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PHOENIX	AZ
2017-08-07	480-571	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2017-06-22	480-923	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2017-04-28	480-867	0–9 XXXall 10 · 5 holders which blocks →	COMMIO, LLC	939H	PHOENIX	AZ

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.