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
2023-05-12 573-904-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-12 573-904-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-12 573-904-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-05-10 573-867-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELSBERRY MO
2023-05-08 573-965-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 VERSAILLES MO
2023-05-05 573-580-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F BELLE MO
2023-05-05 573-640-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SILEX MO
2023-05-05 573-862-1XXX 1000–1999Assigned WINDSTREAM MISSOURI, INC. 1885 STELIZABTH MO
2023-05-04 573-908-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J JACKSON MO
2023-05-03 573-419-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAFFEE MO
2023-04-28 573-537-9XXX 9000–9999Assigned COMMIO, LLC 939H ROLLA MO
2023-04-28 573-937-8XXX 8000–8999Assigned COMMIO, LLC 939H WAYNESVL MO
2023-04-26 573-206-7XXX 7000–7999Assigned TELNYX LLC 073H BEAUFORT MO
2023-04-26 573-306-1XXX 1000–1999Assigned TELNYX LLC 073H EMINENCE MO
2023-04-24 573-970-1XXX 1000–1999Assigned NUSO, LLC 732J COLUMBIA MO
2023-04-20 573-972-0XXX 0000–0999Assigned TELNYX LLC 073H META MO
2023-04-07 573-970-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F COLUMBIA MO
2023-04-03 573-906-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-04-03 573-906-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-04-03 573-906-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-332-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-31 573-841-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2023-03-29 573-425-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 HUNNEWELL MO
2023-03-27 573-269-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E OATES MO
2023-03-27 573-905-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J JEFFERSNCY MO
2023-03-22 573-233-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 CHARLESTON MO
2023-03-22 573-935-1XXX 1000–1999Assigned TELNYX LLC 073H DEXTER MO
2023-03-21 573-361-7XXX 7000–7999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ESSEX MO
2023-03-17 573-423-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 BELLEVIEW MO
2023-03-16 573-671-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LICKING MO
2023-03-16 573-807-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-807-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-807-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-807-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-904-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-904-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-904-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-16 573-904-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-03-15 573-841-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
2023-03-15 573-899-1XXX 1000–1999Assigned TELNYX LLC 073H ST JAMES MO
2023-03-07 573-691-8XXX 8000–8999Assigned TELNYX LLC 073H JEFFERSNCY MO
2023-03-07 573-790-8XXX 8000–8999Assigned TELNYX LLC 073H CLARKSVL MO
2023-03-07 573-892-9XXX 9000–9999Assigned TELNYX LLC 073H FREMONT MO
2023-03-01 573-500-3XXX 3000–3999Assigned TELNYX LLC 073H CAMPBELL MO
2023-02-27 573-650-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 POTOSI 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.