NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 406
T-MOBILE USA, INC. 7
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 2
NEW CINGULAR WIRELESS PCS, 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
2019-08-21 406-418-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F COOKE CITY MT
2019-08-21 406-501-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F WHITEHALL MT
2019-08-21 406-501-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F WHITEHALL MT
2019-08-21 406-719-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F FROMBERG MT
2019-08-21 406-719-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F FROMBERG MT
2019-08-21 406-804-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F GARDINER MT
2019-08-21 406-804-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F GARDINER MT
2019-08-16 406-226-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F EGLACIERPK MT
2019-08-16 406-302-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F WOLF CREEK MT
2019-08-16 406-302-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F WOLF CREEK MT
2019-08-16 406-306-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2019-08-16 406-306-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2019-08-16 406-308-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F CASCADE MT
2019-08-16 406-319-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F POLSON MT
2019-08-16 406-344-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F HAVRE MT
2019-08-16 406-344-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F HAVRE MT
2019-08-16 406-356-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F FORSYTH MT
2019-08-16 406-380-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F LEWISTOWN MT
2019-08-16 406-409-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-08-16 406-420-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F BIGFORK MT
2019-08-16 406-430-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-08-16 406-430-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-08-16 406-446-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F RED LODGE MT
2019-08-16 406-505-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F CONRAD MT
2019-08-16 406-508-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F FRENCHTOWN MT
2019-08-16 406-518-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F GALATNGTWY MT
2019-08-16 406-521-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F TOWNSEND MT
2019-08-16 406-559-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F ANACONDA MT
2019-08-16 406-597-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F SHELBY MT
2019-08-16 406-612-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F SWAN LAKE MT
2019-08-16 406-616-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F THREEFORKS MT
2019-08-16 406-625-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F STEVENSVL MT
2019-08-16 406-629-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F HARDIN MT
2019-08-16 406-629-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F HARDIN MT
2019-08-16 406-630-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F SIDNEY MT
2019-08-16 406-641-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F WYELLOWSTN MT
2019-08-16 406-641-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F WYELLOWSTN MT
2019-08-16 406-642-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F VICTOR MT
2019-08-16 406-642-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F VICTOR MT
2019-08-16 406-643-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F NO PARKMAN MT
2019-08-16 406-645-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F DEER LODGE MT
2019-08-16 406-645-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F DEER LODGE MT
2019-08-16 406-693-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F WARM SPG MT
2019-08-16 406-709-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F LAKESIDE MT
2019-08-16 406-720-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F COLSTRIP MT
2019-08-16 406-720-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F COLSTRIP MT
2019-08-16 406-729-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F WILSALL MT
2019-08-16 406-729-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F WILSALL MT
2019-08-16 406-732-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F ST MARY MT
2019-08-16 406-732-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F ST MARY MT

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.