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
2020-12-22 573-727-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J POPLAR BLF MO
2020-12-22 573-733-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J BELL CITY MO
2020-12-22 573-784-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J FRANKFORD MO
2020-12-22 573-964-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J LKOZKOSBCH MO
2020-12-04 573-852-1XXX 1000–1999Assigned IP HORIZON LLC 515J LINN MO
2020-12-02 573-419-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAFFEE MO
2020-12-02 573-572-0XXX 0000–0999Assigned TELNYX LLC 073H LEASBURG MO
2020-11-27 573-613-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FULTON MO
2020-11-20 573-550-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FULTON MO
2020-11-20 573-730-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CAPEGIRARD MO
2020-11-20 573-730-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CAPEGIRARD MO
2020-11-20 573-730-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CAPEGIRARD MO
2020-11-20 573-832-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VERSAILLES MO
2020-11-20 573-832-7XXX 7000–7999Assigned METROPCS, INC. 5562 VERSAILLES MO
2020-11-18 573-462-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2020-11-18 573-462-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2020-11-16 573-617-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SULLIVAN MO
2020-11-16 573-617-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SULLIVAN MO
2020-11-16 573-617-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SULLIVAN MO
2020-11-16 573-661-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOWLNGGREN MO
2020-11-10 573-818-0XXX 0000–0999Assigned UNITED STATES CELLULAR - MO 6275 COLUMBIA MO
2020-11-09 573-536-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TAOS MO
2020-11-09 573-666-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BOWLNGGREN MO
2020-11-06 573-514-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2020-11-06 573-530-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2020-11-06 573-540-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2020-10-29 573-993-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CLARKSVL MO
2020-10-21 573-992-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F MORRISON MO
2020-10-21 573-992-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F MORRISON MO
2020-10-21 573-993-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2020-10-21 573-993-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2020-10-20 573-542-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CHARLESTON MO
2020-10-20 573-572-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F LEASBURG MO
2020-10-20 573-572-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F LEASBURG MO
2020-10-20 573-877-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F VICHY MO
2020-10-20 573-877-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VICHY MO
2020-10-19 573-405-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F VIENNA MO
2020-10-19 573-405-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F VIENNA MO
2020-10-19 573-409-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F HERMANN MO
2020-10-16 573-307-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F WINONA MO
2020-10-16 573-307-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F WINONA MO
2020-10-15 573-731-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 MONROECITY MO
2020-10-15 573-765-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 RICHLAND MO
2020-10-14 573-229-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F META MO
2020-10-14 573-229-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F META MO
2020-10-14 573-306-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2020-10-14 573-306-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2020-10-14 573-400-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F WESTQUINCY MO
2020-10-14 573-400-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F WESTQUINCY MO
2020-10-14 573-800-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CENTER 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.