NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

11 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 573
INTRADO COMMUNICATIONS, LLC 4
ONVOY, LLC - MO 2
BANDWIDTH.COM CLEC, LLC - MO 2
EXIANT COMMUNICATIONS LLC 1
E. RITTER COMMUNICATIONS, 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
2023-07-13 573-354-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F OXLY MO
2023-07-13 573-845-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F ADVANCE MO
2023-07-13 573-850-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F POPLAR BLF MO
2023-07-11 573-462-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J JEFFERSNCY MO
2023-07-11 573-506-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J TEBBETTS MO
2023-07-11 573-799-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LINN MO
2023-07-11 573-970-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2023-07-10 573-333-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J CARUTHRSVL MO
2023-07-06 573-257-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 JEFFERSNCY MO
2023-07-05 573-257-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 JEFFERSNCY MO
2023-07-05 573-257-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 JEFFERSNCY MO
2023-07-05 573-553-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WESTPHALIA MO
2023-07-05 573-902-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-06-29 573-918-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-06-29 573-918-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-06-29 573-918-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-06-29 573-918-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-06-29 573-941-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLUMBIA MO
2023-06-28 573-940-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F ASHLAND MO
2023-06-27 573-493-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F STELIZABTH MO
2023-06-27 573-498-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F EUGENE MO
2023-06-27 573-520-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F RUSSELLVL MO
2023-06-27 573-536-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F TAOS MO
2023-06-27 573-584-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CENTERTOWN MO
2023-06-27 573-861-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F JEFFERSNCY MO
2023-06-27 573-970-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F COLUMBIA MO
2023-06-27 573-970-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F COLUMBIA MO
2023-06-06 573-902-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-06-02 573-902-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-06-02 573-902-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-06-02 573-902-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-06-02 573-902-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2023-05-24 573-914-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-24 573-914-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-24 573-914-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-23 573-906-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-05-17 573-351-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 DONIPHAN MO
2023-05-15 573-918-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-15 573-918-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-15 573-918-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-15 573-918-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-12 573-904-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-12 573-904-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-12 573-904-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO

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.