NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

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

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 628
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 154
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
2025-04-28 628-335-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-28 628-335-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-07 628-328-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-07 628-328-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-07 628-328-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-07 628-328-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-04-07 628-328-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-02-18 628-328-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-02-18 628-328-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-02-18 628-328-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-02-18 628-328-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2025-02-18 628-328-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2023-02-13 628-754-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2023-02-13 628-754-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2022-09-15 628-321-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-321-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2022-09-15 628-322-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.