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
2007-08-07 551-579-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2007-07-18 551-221-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2007-07-17 551-996-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-17 551-996-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 HACKENSACK NJ
2007-07-03 551-689-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2007-06-07 551-689-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2007-04-25 551-556-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2007-03-01 551-200-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2007-03-01 551-200-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2007-03-01 551-482-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 UNION CITY NJ
2007-03-01 551-482-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 UNION CITY NJ
2007-02-13 551-200-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2007-01-15 551-200-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2007-01-15 551-200-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2007-01-15 551-200-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2006-12-27 551-221-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2006-11-27 551-482-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 UNION CITY NJ
2006-11-27 551-482-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 UNION CITY NJ
2006-11-08 551-579-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2006-11-08 551-795-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2006-11-08 551-795-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2006-11-08 551-795-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2006-09-22 551-579-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2006-09-22 551-795-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2006-09-22 551-795-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 FAIR LAWN NJ
2006-09-11 551-556-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2006-09-01 551-580-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KEARNY NJ
2006-07-11 551-556-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2006-07-11 551-998-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2006-01-18 551-689-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2006-01-18 551-689-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2006-01-17 551-556-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2005-12-29 551-497-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J HACKENSACK NJ
2005-12-05 551-804-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2005-11-07 551-497-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J HACKENSACK NJ
2005-10-11 551-697-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2005-10-11 551-697-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2005-10-11 551-697-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2005-10-11 551-697-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2005-09-12 551-497-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 HACKENSACK NJ
2005-09-08 551-804-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2005-08-18 551-689-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY 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.