NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 223
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 4
ONVOY, LLC - PA 3
NEW CINGULAR WIRELESS PCS, LLC - DC 3
BOOST SUBSCRIBERCO L.L.C. 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-06-12 223-201-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BIGLERVL PA
2018-06-12 223-201-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BIGLERVL PA
2018-06-12 223-444-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E LANCASTER PA
2018-06-07 223-200-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 YORK PA
2018-06-07 223-200-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 YORK PA
2018-06-07 223-200-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 YORK PA
2018-06-07 223-400-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HANOVER PA
2018-06-07 223-400-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HANOVER PA
2018-06-07 223-400-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HANOVER PA
2018-06-06 223-800-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-06-06 223-800-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-06-06 223-800-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-05-15 223-222-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PALMYRA PA
2018-05-15 223-222-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PALMYRA PA
2018-05-15 223-222-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PALMYRA PA
2018-05-15 223-444-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANCASTER PA
2018-05-15 223-444-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANCASTER PA
2018-05-15 223-444-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LANCASTER PA
2018-05-15 223-777-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STRASBURG PA
2018-05-15 223-777-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STRASBURG PA
2018-05-15 223-777-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 STRASBURG PA
2018-05-15 223-848-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J YORK PA
2018-05-15 223-888-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HALIFAX PA
2018-05-15 223-888-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 HALIFAX PA
2018-05-15 223-999-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHELLSVL PA
2018-05-15 223-999-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHELLSVL PA
2018-05-15 223-999-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHELLSVL PA
2018-05-01 223-777-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F STRASBURG PA
2018-03-28 223-848-0XXX 0000–0999Assigned METROPCS, INC. 5562 YORK PA
2018-03-28 223-848-9XXX 9000–9999Assigned METROPCS, INC. 5562 YORK PA
2018-02-21 223-777-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 STRASBURG PA
2017-12-11 223-202-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-11 223-202-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-11-20 223-888-0XXX 0000–0999Assigned IP HORIZON LLC 515J HALIFAX PA
2017-11-16 223-333-8XXX 8000–8999Assigned IP HORIZON LLC 515J LEBANON PA
2017-11-16 223-333-9XXX 9000–9999Assigned IP HORIZON LLC 515J LEBANON PA
2017-10-23 223-777-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E STRASBURG PA
2017-10-23 223-777-5XXX 5000–5999Assigned ONVOY, LLC - PA 547E STRASBURG PA
2017-10-23 223-777-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E STRASBURG PA
2017-10-09 223-222-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E PALMYRA PA
2017-09-05 223-999-9XXX 9000–9999Assigned ONVOY, LLC - PA 547E SHELLSVL PA
2017-09-01 223-444-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E LANCASTER PA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.