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
2018-05-08 551-217-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-05-08 551-229-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2018-04-27 551-217-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-04-27 551-218-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-04-27 551-218-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-04-17 551-217-7XXX 7000–7999Assigned CABLEVISION LIGHTPATH, INC. - NJ 4948 RAMSEY NJ
2018-04-09 551-260-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-04-09 551-260-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-04-09 551-260-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-04-09 551-260-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-04-09 551-260-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-04-05 551-218-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-04-05 551-218-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-04-05 551-220-9XXX 9000–9999Assigned ONVOY, LLC - NJ 637C JERSEYCITY NJ
2018-03-29 551-260-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-29 551-260-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-29 551-260-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-26 551-229-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-26 551-319-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2018-03-26 551-319-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2018-03-23 551-218-8XXX 8000–8999Assigned METROPCS, INC. 5562 RAMSEY NJ
2018-03-22 551-251-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2018-03-16 551-219-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2018-03-16 551-219-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2018-03-15 551-249-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 PARK RIDGE NJ
2018-03-09 551-259-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-09 551-259-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2018-03-08 551-274-7XXX 7000–7999Assigned ONVOY, LLC - NJ 637C KEARNY NJ
2018-02-28 551-239-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C CLIFFSIDE NJ
2018-02-27 551-248-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - NJ 4948 CLOSTER NJ
2018-02-19 551-212-3XXX 3000–3999Assigned ONVOY, LLC - NJ 637C TEANECK NJ
2018-02-19 551-319-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C WYCKOFF NJ
2018-02-14 551-230-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C ENGLEWOOD NJ
2018-01-29 551-219-0XXX 0000–0999Assigned METROPCS, INC. 5562 HACKENSACK NJ
2018-01-29 551-219-1XXX 1000–1999Assigned METROPCS, INC. 5562 HACKENSACK NJ
2018-01-29 551-219-2XXX 2000–2999Assigned METROPCS, INC. 5562 HACKENSACK NJ
2018-01-29 551-219-9XXX 9000–9999Assigned METROPCS, INC. 5562 HACKENSACK NJ
2018-01-24 551-300-0XXX 0000–0999Assigned ONVOY, LLC - NJ 637C UNION CITY NJ
2018-01-24 551-300-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C UNION CITY NJ
2018-01-24 551-300-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C UNION CITY NJ
2018-01-24 551-300-3XXX 3000–3999Assigned ONVOY, LLC - NJ 637C UNION CITY NJ
2018-01-17 551-289-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK 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.