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
2020-08-10 573-415-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 JEFFERSNCY MO
2020-07-28 573-567-2XXX 2000–2999Assigned UNITED STATES CELLULAR - MO 6275 MEXICO MO
2020-07-20 573-357-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H PARMA MO
2020-07-20 573-357-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H PARMA MO
2020-07-20 573-357-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H PARMA MO
2020-07-15 573-299-6XXX 6000–6999Assigned TELNYX LLC 073H VICHY MO
2020-07-15 573-307-2XXX 2000–2999Assigned TELNYX LLC 073H WINONA MO
2020-07-15 573-312-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 ELSBERRY MO
2020-07-15 573-320-2XXX 2000–2999Assigned TELNYX LLC 073H VAN BUREN MO
2020-07-15 573-393-0XXX 0000–0999Assigned TELNYX LLC 073H WESTQUINCY MO
2020-07-15 573-405-2XXX 2000–2999Assigned TELNYX LLC 073H VIENNA MO
2020-07-15 573-455-5XXX 5000–5999Assigned TELNYX LLC 073H WESTPHALIA MO
2020-07-15 573-531-0XXX 0000–0999Assigned TELNYX LLC 073H TIMBER MO
2020-07-15 573-536-0XXX 0000–0999Assigned TELNYX LLC 073H TAOS MO
2020-07-15 573-828-0XXX 0000–0999Assigned TELNYX LLC 073H VANDALIA MO
2020-07-15 573-899-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST JAMES MO
2020-07-14 573-263-7XXX 7000–7999Assigned TELNYX LLC 073H ST JAMES MO
2020-07-14 573-269-0XXX 0000–0999Assigned TELNYX LLC 073H OATES MO
2020-07-14 573-367-0XXX 0000–0999Assigned TELNYX LLC 073H SAFE MO
2020-07-14 573-453-1XXX 1000–1999Assigned TELNYX LLC 073H SALEM MO
2020-07-14 573-515-1XXX 1000–1999Assigned TELNYX LLC 073H SHELBINA MO
2020-07-14 573-520-0XXX 0000–0999Assigned TELNYX LLC 073H RUSSELLVL MO
2020-07-14 573-565-0XXX 0000–0999Assigned TELNYX LLC 073H PERRY MO
2020-07-14 573-633-0XXX 0000–0999Assigned TELNYX LLC 073H SHELBYVL MO
2020-07-14 573-672-0XXX 0000–0999Assigned TELNYX LLC 073H STOUTSVL MO
2020-07-14 573-685-0XXX 0000–0999Assigned TELNYX LLC 073H SANTA FE MO
2020-07-14 573-687-0XXX 0000–0999Assigned TELNYX LLC 073H STURGEON MO
2020-07-14 573-698-4XXX 4000–4999Assigned TELNYX LLC 073H ROCHEPORT MO
2020-07-14 573-769-1XXX 1000–1999Assigned TELNYX LLC 073H PALMYRA MO
2020-07-09 573-229-5XXX 5000–5999Assigned TELNYX LLC 073H META MO
2020-07-09 573-294-0XXX 0000–0999Assigned TELNYX LLC 073H MORRISON MO
2020-07-09 573-503-0XXX 0000–0999Assigned TELNYX LLC 073H MIDDLETOWN MO
2020-07-09 573-548-0XXX 0000–0999Assigned TELNYX LLC 073H MONTAUK MO
2020-07-09 573-731-0XXX 0000–0999Assigned TELNYX LLC 073H MONROECITY MO
2020-07-09 573-767-2XXX 2000–2999Assigned TELNYX LLC 073H MONTICELLO MO
2020-07-09 573-943-1XXX 1000–1999Assigned TELNYX LLC 073H MTSTERLING MO
2020-07-08 573-257-2XXX 2000–2999Assigned TELNYX LLC 073H JEFFERSNCY MO
2020-07-08 573-373-0XXX 0000–0999Assigned TELNYX LLC 073H LADDONIA MO
2020-07-08 573-417-2XXX 2000–2999Assigned TELNYX LLC 073H LINN MO
2020-07-08 573-487-0XXX 0000–0999Assigned TELNYX LLC 073H LESTERVL MO
2020-07-08 573-490-0XXX 0000–0999Assigned TELNYX LLC 073H LEWISTOWN MO
2020-07-08 573-492-4XXX 4000–4999Assigned TELNYX LLC 073H MARTINSBG MO
2020-07-08 573-652-0XXX 0000–0999Assigned TELNYX LLC 073H LA GRANGE MO
2020-07-08 573-671-3XXX 3000–3999Assigned TELNYX LLC 073H LICKING MO
2020-07-07 573-224-1XXX 1000–1999Assigned TELNYX LLC 073H GREENVILLE MO
2020-07-07 573-226-0XXX 0000–0999Assigned TELNYX LLC 073H EMINENCE MO
2020-07-07 573-251-0XXX 0000–0999Assigned TELNYX LLC 073H FREMONT MO
2020-07-07 573-296-1XXX 1000–1999Assigned TELNYX LLC 073H HALLSVILLE MO
2020-07-07 573-322-1XXX 1000–1999Assigned TELNYX LLC 073H ELLSINORE MO
2020-07-07 573-409-1XXX 1000–1999Assigned TELNYX LLC 073H HERMANN 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.