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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-05-06 406-694-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-05-06 406-694-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-05-03 406-551-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BOZEMAN MT
2011-05-03 406-551-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BOZEMAN MT
2011-04-19 406-213-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F COLSTRIP MT
2011-04-19 406-224-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 LIVINGSTON MT
2011-04-19 406-662-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F BRIDGER MT
2011-04-19 406-924-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F BELGRADE MT
2011-04-08 406-407-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 KALISPELL MT
2011-04-08 406-565-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BUTTE MT
2011-04-07 406-235-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOLF CREEK MT
2011-04-07 406-426-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RED LODGE MT
2011-03-29 406-334-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F LIBBY MT
2011-03-25 406-631-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F ELMO MT
2011-03-25 406-929-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F HUNGRYHORS MT
2011-03-15 406-686-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E CLYDE PARK MT
2011-03-04 406-219-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2011-03-04 406-274-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 MISSOULA MT
2011-03-04 406-399-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 SOUTHHAVRE MT
2011-03-04 406-437-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 HELENA MT
2011-03-04 406-564-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 GREATFALLS MT
2011-03-04 406-694-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-03-01 406-633-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LAUREL MT
2011-02-25 406-290-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COLUMBUS MT
2011-02-25 406-445-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RED LODGE MT
2011-02-04 406-393-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F SOMERS MT
2011-02-04 406-420-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F BIGFORK MT
2011-02-04 406-612-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F SWAN LAKE MT
2011-02-04 406-692-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F YELLOW BAY MT
2011-02-04 406-709-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F LAKESIDE MT
2011-02-04 406-820-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F OLNEY MT
2011-02-04 406-872-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F POLSON MT
2011-02-04 406-991-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F MARION MT
2011-01-11 406-315-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K GREATFALLS MT
2011-01-11 406-926-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MISSOULA MT
2011-01-11 406-969-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BILLINGS MT
2011-01-11 406-996-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HELENA MT
2011-01-07 406-214-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 MISSOULA MT
2011-01-07 406-214-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 MISSOULA MT
2011-01-07 406-407-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 KALISPELL MT
2011-01-07 406-407-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 KALISPELL MT
2011-01-07 406-438-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 HELENA MT
2011-01-07 406-470-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 SHELBY MT
2011-01-07 406-564-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 GREATFALLS MT
2011-01-07 406-564-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 GREATFALLS MT
2011-01-07 406-565-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BUTTE MT
2011-01-07 406-647-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-01-07 406-694-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-01-07 406-694-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 BILLINGS MT
2011-01-07 406-852-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 MILES CITY 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.