NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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 353
ONVOY, LLC - WI 36
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
2026-07-28 353-200-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C MADISON WI
2026-07-28 353-200-5XXX 5000–5999Assigned ONVOY, LLC - WI 225C MADISON WI
2026-07-28 353-465-1XXX 1000–1999Assigned ONVOY, LLC - WI 225C MADISON WI
2026-05-29 353-201-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C MADISON WI
2025-12-26 353-353-3XXX 3000–3999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-353-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-353-5XXX 5000–5999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-353-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-353-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-353-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C BELLEVILLE WI
2025-12-26 353-529-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C DE FOREST WI
2025-12-26 353-529-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C DE FOREST WI
2025-12-26 353-529-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C DE FOREST WI
2025-10-14 353-200-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C MADISON WI
2025-10-14 353-200-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C MADISON WI
2025-10-03 353-200-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C MADISON WI
2025-08-29 353-222-2XXX 2000–2999Assigned ONVOY, LLC - WI 225C LONE ROCK WI
2025-08-29 353-222-3XXX 3000–3999Assigned ONVOY, LLC - WI 225C LONE ROCK WI
2025-08-29 353-222-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C LONE ROCK WI
2025-08-29 353-333-3XXX 3000–3999Assigned ONVOY, LLC - WI 225C MONTELLO WI
2025-08-29 353-333-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C MONTELLO WI
2025-08-29 353-333-5XXX 5000–5999Assigned ONVOY, LLC - WI 225C MONTELLO WI
2025-08-29 353-444-4XXX 4000–4999Assigned ONVOY, LLC - WI 225C BLOOM CITY WI
2025-08-29 353-444-5XXX 5000–5999Assigned ONVOY, LLC - WI 225C BLOOM CITY WI
2025-08-29 353-444-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C BLOOM CITY WI
2025-08-29 353-666-6XXX 6000–6999Assigned ONVOY, LLC - WI 225C CENTERVL WI
2025-08-29 353-666-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C CENTERVL WI
2025-08-29 353-666-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C CENTERVL WI
2025-08-29 353-777-7XXX 7000–7999Assigned ONVOY, LLC - WI 225C MAZOMANIE WI
2025-08-29 353-777-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C MAZOMANIE WI
2025-08-29 353-777-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C MAZOMANIE WI
2025-08-29 353-888-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C ALBANY WI
2025-08-29 353-888-8XXX 8000–8999Assigned ONVOY, LLC - WI 225C ALBANY WI
2025-08-29 353-888-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C ALBANY WI
2025-08-21 353-999-0XXX 0000–0999Assigned ONVOY, LLC - WI 225C ITHACA WI
2025-08-21 353-999-9XXX 9000–9999Assigned ONVOY, LLC - WI 225C ITHACA WI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.