NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 484
CORE COMMUNICATIONS, INC. - PA 356
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
2019-04-05 484-829-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN24 PA
2019-04-05 484-829-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN24 PA
2019-04-04 484-435-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2019-04-04 484-435-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2019-04-04 484-435-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2019-04-04 484-435-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2019-03-28 484-606-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-606-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-606-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-606-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-607-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-607-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-28 484-694-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DOWNINGTN PA
2019-03-28 484-696-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 DOWNINGTN PA
2019-03-28 484-972-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-972-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-974-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-974-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-974-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-977-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-28 484-977-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 COLLEGEVL PA
2019-03-21 484-837-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EASTON PA
2019-03-15 484-627-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EASTON PA
2019-03-15 484-627-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EASTON PA
2019-03-15 484-867-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 EASTON PA
2019-03-13 484-242-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BETHLEHEM PA
2019-03-13 484-242-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BETHLEHEM PA
2019-03-13 484-242-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BETHLEHEM PA
2019-03-13 484-265-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLATINGTON PA
2019-03-13 484-623-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLATINGTON PA
2019-03-13 484-623-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SLATINGTON PA
2019-03-12 484-325-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN28 PA
2019-03-12 484-386-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN25 PA
2019-03-12 484-436-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN23 PA
2019-03-12 484-446-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2019-03-12 484-457-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN21 PA
2019-03-12 484-468-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2019-03-12 484-468-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN12 PA
2019-03-12 484-524-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 POTTSTOWN PA
2019-03-12 484-543-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROBESONIA PA
2019-03-12 484-543-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ROBESONIA PA
2019-03-12 484-774-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN30 PA
2019-03-12 484-774-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN30 PA
2019-03-12 484-774-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN30 PA
2019-03-11 484-292-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NAZARETH PA
2019-03-11 484-296-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NAZARETH PA
2019-03-08 484-277-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEESPORT PA
2019-03-08 484-277-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LEESPORT PA
2019-03-08 484-826-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE PA
2019-03-08 484-826-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LENAPE 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.