NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

29 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 551
ONVOY, LLC - NJ 12
NEW CINGULAR WIRELESS PCS, LLC - DC 11
CSC WIRELESS, LLC 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 3
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2014-05-09 551-500-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2014-04-08 551-223-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F FAIR LAWN NJ
2014-04-08 551-223-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F FAIR LAWN NJ
2014-04-08 551-500-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 RAMSEY NJ
2014-04-08 551-999-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 HACKENSACK NJ
2014-04-04 551-222-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JERSEYCITY NJ
2014-04-04 551-500-0XXX 0000–0999Assigned ONVOY, LLC - NJ 637C RAMSEY NJ
2014-04-04 551-900-0XXX 0000–0999Assigned ONVOY, LLC - NJ 637C DUMONT NJ
2014-04-02 551-444-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F FAIR LAWN NJ
2014-03-28 551-888-5XXX 5000–5999Assigned ONVOY, LLC - NJ 637C UNION CITY NJ
2014-03-05 551-800-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F WESTWOOD NJ
2014-03-05 551-800-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F WESTWOOD NJ
2014-03-04 551-777-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2014-03-04 551-777-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2014-02-24 551-444-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 FAIR LAWN NJ
2014-02-18 551-444-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIR LAWN NJ
2014-01-16 551-800-0XXX 0000–0999Assigned ONVOY, LLC - NJ 637C WESTWOOD NJ
2014-01-09 551-999-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2014-01-09 551-999-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2014-01-09 551-999-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2014-01-09 551-999-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2014-01-09 551-999-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2013-11-21 551-444-3XXX 3000–3999Assigned CABLEVISION LIGHTPATH, INC. - NJ 4948 FAIR LAWN NJ
2013-11-19 551-444-5XXX 5000–5999Assigned ONVOY, LLC - NJ 637C FAIR LAWN NJ
2013-10-24 551-444-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2013-10-14 551-444-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 FAIR LAWN NJ
2013-10-14 551-666-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2013-10-14 551-888-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2013-10-14 551-888-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2013-09-16 551-777-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RAMSEY NJ
2013-08-15 551-222-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2013-08-15 551-777-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F RAMSEY NJ
2013-08-13 551-222-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JERSEYCITY NJ
2013-08-13 551-777-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RAMSEY NJ
2013-07-19 551-222-3XXX 3000–3999Assigned ONVOY, LLC - NJ 637C JERSEYCITY NJ
2013-05-31 551-666-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2013-05-31 551-666-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2013-05-31 551-666-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2013-05-31 551-666-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2013-04-30 551-222-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C JERSEYCITY NJ
2013-04-29 551-666-6XXX 6000–6999Assigned ONVOY, LLC - NJ 637C BAYONNE NJ
2013-04-29 551-999-9XXX 9000–9999Assigned ONVOY, LLC - NJ 637C HACKENSACK NJ
2013-03-20 551-444-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F FAIR LAWN NJ
2013-03-20 551-444-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F FAIR LAWN NJ
2013-03-20 551-777-8XXX 8000–8999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F RAMSEY NJ
2013-03-20 551-777-9XXX 9000–9999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F RAMSEY NJ
2013-03-20 551-888-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F UNION CITY NJ
2013-03-20 551-888-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F UNION CITY NJ
2013-03-12 551-777-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2013-03-12 551-777-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.