NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 484
ONVOY, LLC - PA 7
NEW CINGULAR WIRELESS PCS, LLC - DC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-10-16 484-448-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-449-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-453-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-457-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-457-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-468-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-468-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2018-10-16 484-562-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2018-10-16 484-562-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2018-10-16 484-580-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-580-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-584-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-584-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-586-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-586-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-586-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-588-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-652-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN14 PA
2018-10-16 484-654-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-654-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-654-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN26 PA
2018-10-16 484-675-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-675-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2018-10-16 484-708-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN24 PA
2018-10-16 484-776-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MENDENHALL PA
2018-10-16 484-776-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MENDENHALL PA
2018-10-16 484-776-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MENDENHALL PA
2018-10-16 484-776-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MENDENHALL PA
2018-10-16 484-776-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MENDENHALL PA
2018-10-16 484-843-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN10 PA
2018-10-16 484-843-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN10 PA
2018-10-16 484-843-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN10 PA
2018-10-16 484-848-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN10 PA
2018-10-16 484-988-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2018-10-15 484-243-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN31 PA
2018-10-15 484-248-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEESPORT PA
2018-10-15 484-277-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEESPORT PA
2018-10-15 484-277-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEESPORT PA

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.