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
2011-09-15 573-944-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREDERCKTN MO
2011-09-09 573-539-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F VERSAILLES MO
2011-08-30 573-969-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CENTRALIA MO
2011-08-26 573-567-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MEXICO MO
2011-08-26 573-574-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MONTGORYCY MO
2011-08-26 573-684-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WELLSVILLE MO
2011-08-26 573-719-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HANNIBAL MO
2011-08-22 573-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PUXICO MO
2011-08-22 573-342-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E RICHWOODS MO
2011-08-22 573-352-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E POCAHONTAS MO
2011-08-22 573-513-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PERRYVILLE MO
2011-08-22 573-539-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E VERSAILLES MO
2011-08-22 573-608-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E STEGNVIEVE MO
2011-08-22 573-727-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E POPLAR BLF MO
2011-08-19 573-200-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAPEGIRARD MO
2011-08-19 573-206-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E BEAUFORT MO
2011-08-19 573-207-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E GRAVOIS ML MO
2011-08-19 573-260-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CLIMAX SPG MO
2011-08-19 573-315-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FLAT RIVER MO
2011-08-19 573-319-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MACKSCREEK MO
2011-08-19 573-321-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E ADVANCE MO
2011-08-19 573-349-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PATTON MO
2011-08-19 573-416-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FULTON MO
2011-08-19 573-525-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAMDENTON MO
2011-08-19 573-557-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E ELDON MO
2011-08-19 573-567-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MEXICO MO
2011-08-19 573-693-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E LKOZKOSBCH MO
2011-08-19 573-741-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARBLEHILL MO
2011-08-16 573-714-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2011-08-16 573-825-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2011-08-16 573-838-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIKESTON MO
2011-08-16 573-889-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LICKING MO
2011-08-02 573-539-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2011-08-01 573-203-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E SENATH MO
2011-07-27 573-789-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2011-07-22 573-612-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROLLA MO
2011-07-22 573-719-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HANNIBAL MO
2011-07-20 573-719-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HANNIBAL MO
2011-07-18 573-340-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E WELLSVILLE MO
2011-07-14 573-553-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 WESTPHALIA MO
2011-07-06 573-227-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARSTON MO
2011-07-06 573-227-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARSTON MO
2011-07-06 573-559-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E KENNETT MO
2011-07-06 573-559-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E KENNETT MO
2011-07-06 573-990-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MALDEN MO
2011-07-06 573-990-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MALDEN MO
2011-07-05 573-705-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FARMINGTON MO
2011-07-05 573-825-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2011-07-05 573-825-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2011-07-05 573-953-3XXX 3000–3999Assigned 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.