Recent prefix assignments

1 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 551

NEW CINGULAR WIRELESS PCS, LLC - DC 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
2020-02-14	551-356	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	KEARNY	NJ
2020-02-14	551-465	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	LEONIA	NJ
2020-02-14	551-529	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	UNION CITY	NJ
2020-02-14	551-758	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	JERSEYCITY	NJ
2020-02-04	551-554	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NJ	637C	JERSEYCITY	NJ
2019-12-17	551-552	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - NJ	637C	CRAGMERE	NJ
2019-08-12	551-306	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	UNION CITY	NJ
2019-07-26	551-305	0–9 XXXall 10 · 3 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NJ	4948	RIDGEWOOD	NJ
2019-07-19	551-400	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NJ	637C	CRAGMERE	NJ
2019-04-05	551-298	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	JERSEYCITY	NJ
2019-04-03	551-302	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	HACKENSACK	NJ
2019-03-20	551-314	0–9 XXXall 10 · 4 holders which blocks →	CORETEL NEW JERSEY, INC. - NJ	482F	CLIFFSIDE	NJ
2019-01-28	551-303	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	CLOSTER	NJ
2019-01-28	551-340	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	HACKENSACK	NJ
2019-01-28	551-370	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	RIDGEWOOD	NJ
2019-01-15	551-299	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	FAIR LAWN	NJ
2018-12-19	551-297	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	BAYONNE	NJ
2018-12-12	551-296	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	OAKLAND	NJ
2018-12-12	551-308	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	RAMSEY	NJ
2018-11-26	551-295	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	HACKENSACK	NJ
2018-11-26	551-301	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	RUTHERFORD	NJ
2018-11-07	551-293	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HACKENSACK	NJ
2018-11-01	551-292	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF NEW JERSEY, LLC - NJ	264F	KEARNY	NJ
2018-10-26	551-291	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	RAMSEY	NJ
2018-09-13	551-287	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HACKENSACK	NJ
2018-09-11	551-557	0–9 XXXall 10 · 8 holders which blocks →	BLUEBIRD COMMUNICATIONS, LLC - NJ	999H	PARK RIDGE	NJ
2018-08-24	551-286	0–9 XXXall 10 · 4 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NJ	4948	HACKENSACK	NJ
2018-08-16	551-284	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - NJ	637C	RIDGEWOOD	NJ
2018-07-30	551-282	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NJ	118F	WESTWOOD	NJ
2018-07-11	551-279	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	RAMSEY	NJ
2018-07-11	551-281	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HACKENSACK	NJ
2018-06-26	551-280	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NJ	118F	JERSEYCITY	NJ
2018-06-04	551-270	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	RAMSEY	NJ
2018-05-29	551-266	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	FAIR LAWN	NJ
2018-05-10	551-261	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	JERSEYCITY	NJ
2018-05-10	551-402	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	RAMSEY	NJ
2018-03-28	551-260	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	JERSEYCITY	NJ
2018-03-22	551-251	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	HACKENSACK	NJ
2018-03-08	551-259	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HACKENSACK	NJ
2018-02-27	551-239	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - NJ	637C	CLIFFSIDE	NJ
2018-02-15	551-319	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - NJ	637C	WYCKOFF	NJ
2018-02-13	551-230	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NJ	637C	ENGLEWOOD	NJ
2018-01-26	551-219	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	HACKENSACK	NJ
2018-01-19	551-300	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - NJ	637C	UNION CITY	NJ
2018-01-16	551-289	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	HACKENSACK	NJ
2017-12-27	551-283	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HACKENSACK	NJ
2017-12-15	551-399	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	BAYONNE	NJ
2017-12-15	551-722	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	HASBROKHTS	NJ
2017-12-08	551-218	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	RAMSEY	NJ
2017-11-14	551-269	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	RAMSEY	NJ

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.