Recent prefix assignments

2 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 747

ONVOY, LLC - CA 2

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
2015-05-18	747-237	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	NORTHRIDGE	CA
2015-05-05	747-256	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	NO HOLLYWD	CA
2015-04-24	747-253	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SNFN SNFN	CA
2015-04-16	747-248	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	NO HOLLYWD	CA
2015-04-16	747-252	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	SNFN GRHL	CA
2015-04-16	747-254	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	RESEDA	CA
2015-04-14	747-239	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNFN GRHL	CA
2015-04-13	747-246	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SNFN SNFN	CA
2015-04-01	747-230	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CANOGAPARK	CA
2015-03-17	747-243	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	VAN NUYS	CA
2015-03-13	747-241	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	BRBN BRBN	CA
2014-12-23	747-238	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	BRBN BRBN	CA
2014-11-07	747-231	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	GLENDALE	CA
2014-10-30	747-235	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	NORTHRIDGE	CA
2014-10-20	747-234	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	BRBN BRBN	CA
2014-10-03	747-242	0–9 XXXall 10 · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	CANOGAPARK	CA
2014-09-30	747-227	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SNFN PACM	CA
2014-08-11	747-998	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	VAN NUYS	CA
2014-06-17	747-229	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BRBN BRBN	CA
2014-04-14	747-232	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNFN GRHL	CA
2014-02-28	747-228	0–9 XXXall 10 · 6 holders which blocks →	CONNECTTO COMMUNICATIONS, INC. - CA	863D	GLENDALE	CA
2013-06-13	747-226	0–9 XXXall 10 · 7 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	CANOGAPARK	CA
2013-03-08	747-220	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	AGOURA	CA
2013-03-08	747-223	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BRBN SNVY	CA
2013-03-08	747-322	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNFN SNFN	CA
2013-02-23	747-225	0–9 XXXall 10 · 8 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	SNFN PACM	CA
2013-02-01	747-221	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	GLENDALE	CA
2013-02-01	747-233	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	VAN NUYS	CA
2013-01-24	747-202	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	NORTHRIDGE	CA
2011-04-04	747-201	0–9 XXXall 10 · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BRBN BRBN	CA
2011-03-29	747-200	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BRBN BRBN	CA
2009-08-14	747-224	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	NORTHRIDGE	CA
—	747-210	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	SNFN SNFN	CA
—	747-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT		CA
—	747-222	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	AGOURA	CA
—	747-236	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SNFN SPLV	CA
—	747-245	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CA	649C	BRBN SNVY	CA
—	747-249	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CANOGAPARK	CA
—	747-258	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	BRBN BRBN	CA
—	747-294	0–9 XXXall 10 · 5 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	SNFN SNFN	CA
—	747-296	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BRBN BRBN	CA
—	747-300	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	SNFN GRHL	CA
—	747-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT		CA
—	747-314	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	BRBN BRBN	CA
—	747-333	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	BRBN BRBN	CA
—	747-334	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	AGOURA	CA
—	747-346	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CA	649C	SUNLD TJNG	CA
—	747-400	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CA	649C	BRBN BRBN	CA
—	747-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT		CA
—	747-444	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CA	649C	CANOGAPARK	CA

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.