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
2019-09-06 573-403-8XXX 8000–8999Assigned TELNYX LLC 073H WYATT MO
2019-09-06 573-404-1XXX 1000–1999Assigned TELNYX LLC 073H QULIN MO
2019-09-06 573-534-8XXX 8000–8999Assigned TELNYX LLC 073H BONNETERRE MO
2019-09-06 573-599-4XXX 4000–4999Assigned TELNYX LLC 073H TUSCUMBIA MO
2019-09-06 573-628-8XXX 8000–8999Assigned TELNYX LLC 073H WARDELL MO
2019-09-06 573-734-5XXX 5000–5999Assigned TELNYX LLC 073H BISMARCK MO
2019-09-06 573-798-8XXX 8000–8999Assigned TELNYX LLC 073H MOREHOUSE MO
2019-09-06 573-847-0XXX 0000–0999Assigned TELNYX LLC 073H PAYNESVL MO
2019-09-06 573-873-0XXX 0000–0999Assigned TELNYX LLC 073H CAMDENTON MO
2019-09-06 573-966-2XXX 2000–2999Assigned TELNYX LLC 073H LEADWOOD MO
2019-09-06 573-967-0XXX 0000–0999Assigned TELNYX LLC 073H FISK MO
2019-08-29 573-317-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 CAMDENTON MO
2019-08-28 573-453-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM MO
2019-08-28 573-666-0XXX 0000–0999Assigned TELNYX LLC 073H BOWLNGGREN MO
2019-08-28 573-715-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM MO
2019-08-28 573-813-0XXX 0000–0999Assigned TELNYX LLC 073H E PRAIRIE MO
2019-08-28 573-843-0XXX 0000–0999Assigned TELNYX LLC 073H CARUTHRSVL MO
2019-08-28 573-937-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAYNESVL MO
2019-08-28 573-937-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAYNESVL MO
2019-08-28 573-998-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E WILLIAMSVL MO
2019-08-27 573-426-7XXX 7000–7999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ROLLA MO
2019-08-27 573-868-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E GREENVILLE MO
2019-08-14 573-658-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 JEFFERSNCY MO
2019-08-12 573-604-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINONA MO
2019-08-05 573-297-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E WAPPAPLLPK MO
2019-08-05 573-641-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CLARK MO
2019-08-02 573-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H BOWLNGGREN MO
2019-08-02 573-800-0XXX 0000–0999Assigned FRACTEL, LLC 965H CENTER MO
2019-08-02 573-800-8XXX 8000–8999Assigned FRACTEL, LLC 965H CENTER MO
2019-08-02 573-900-0XXX 0000–0999Assigned FRACTEL, LLC 965H PERRYVILLE MO
2019-08-02 573-900-9XXX 9000–9999Assigned FRACTEL, LLC 965H PERRYVILLE MO
2019-06-27 573-813-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 E PRAIRIE MO
2019-05-10 573-872-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 POPLAR BLF MO
2019-04-23 573-245-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F LEASBURG MO
2019-04-23 573-245-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F LEASBURG MO
2019-04-23 573-299-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F VICHY MO
2019-04-23 573-299-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VICHY MO
2019-04-23 573-306-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2019-04-23 573-306-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2019-04-23 573-307-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F WINONA MO
2019-04-23 573-307-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F WINONA MO
2019-04-23 573-320-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VAN BUREN MO
2019-04-23 573-320-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F VAN BUREN MO
2019-04-23 573-464-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CALIFORNIA MO
2019-04-23 573-464-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F CALIFORNIA MO
2019-04-23 573-892-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F FREMONT MO
2019-04-23 573-892-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F FREMONT MO
2019-04-19 573-250-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2019-04-19 573-250-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2019-04-19 573-258-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F SIKESTON 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.