Recent prefix assignments

0 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, all time — NPA 279

ONVOY, LLC - CA 36

FRACTEL, LLC 36

T-MOBILE USA, INC. 15

NEW CINGULAR WIRELESS PCS, LLC 13

MULTIPLE OCN LISTING 9

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
2023-09-19	279-244	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	SO PLACER	CA
2023-08-23	279-241	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	SCRM MAIN	CA
2023-08-17	279-240	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	ELK GROVE	CA
2023-06-22	279-238	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SCRM MAIN	CA
2023-06-22	279-239	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	FOLSOM	CA
2023-05-19	279-237	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	SCRM MAIN	CA
2023-04-12	279-236	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	RSVL MAIN	CA
2023-03-23	279-737	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	ONVOY, LLC - CA	649C	RSVL CTHT	CA
2023-03-22	279-297	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CA	649C	ELK GROVE	CA
2023-01-26	279-230	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	RSVL MAIN	CA
2022-11-18	279-790	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CA	649C	FAIR OAKS	CA
2022-11-04	279-232	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	COMMIO, LLC	939H	MICHIGNBAR	CA
2022-10-20	279-235	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	FOLSOM	CA
2022-10-03	279-228	0–9 XXXall 10 · 4 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	SCRM MAIN	CA
2022-09-30	279-289	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	FOLSOM	CA
2022-08-25	279-227	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SO PLACER	CA
2022-08-12	279-226	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	RSVL MAIN	CA
2022-06-29	279-225	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SCRM NORTH	CA
2022-06-17	279-221	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	SCRM MAIN	CA
2022-06-03	279-224	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SCRM MAIN	CA
2022-05-27	279-218	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SCRM NORTH	CA
2022-05-26	279-229	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SCRM MAIN	CA
2022-05-24	279-688	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	FRACTEL, LLC	965H	ISLETON	CA
2022-05-24	279-966	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	LINCOLN	CA
2022-05-13	279-220	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SCRM MAIN	CA
2022-02-24	279-867	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	ELK GROVE	CA
2022-02-18	279-789	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	SCRM MAIN	CA
2022-02-11	279-219	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	FOLSOM	CA
2022-01-18	279-675	0–9 XXXall 10 · 2 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	RSVL MAIN	CA
2022-01-07	279-782	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	FAIR OAKS	CA
2022-01-04	279-223	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SCRM MAIN	CA
2021-12-10	279-216	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SCRM MAIN	CA
2021-12-10	279-944	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	SCRM NORTH	CA
2021-12-09	279-277	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	FRACTEL, LLC	965H	RSVL CTHT	CA
2021-11-22	279-215	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	FOLSOM	CA
2021-11-17	279-901	0–9 XXXall 10 · 5 holders which blocks →	ONVOY SPECTRUM, LLC	624H	ELK GROVE	CA
2021-10-01	279-213	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	LINCOLN	CA
2021-10-01	279-214	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	FAIR OAKS	CA
2021-09-15	279-977	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	RSVL MAIN	CA
2021-07-16	279-766	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	MEADOWVIEW	CA
2021-07-07	279-322	1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	WALNUT GRV	CA
2021-07-07	279-499	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	SCRM NORTH	CA
2021-07-07	279-599	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	SCRM MAIN	CA
2021-07-07	279-899	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	COURTLAND	CA
2021-06-17	279-587	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	PLEASATGRV	CA
2021-05-19	279-247	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	SCRM NORTH	CA
2021-05-18	279-386	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	SCRM MAIN	CA
2021-04-19	279-699	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	RIO LINDA	CA
2021-04-15	279-212	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MICHIGNBAR	CA
2021-02-25	279-732	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	FOLSOM	CA

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.