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
2019-12-05 573-297-8XXX 8000–8999Assigned WINDSTREAM MISSOURI, INC. 1885 WAPPAPLLPK MO
2019-12-05 573-354-9XXX 9000–9999Assigned WINDSTREAM MISSOURI, INC. 1885 OXLY MO
2019-12-05 573-591-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEXICO MO
2019-12-05 573-593-1XXX 1000–1999Assigned WINDSTREAM MISSOURI, INC. 1885 GRANDIN MO
2019-12-05 573-856-9XXX 9000–9999Assigned WINDSTREAM MISSOURI, INC. 1885 PATTERSON MO
2019-11-25 573-223-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PIEDMONT MO
2019-11-14 573-843-5XXX 5000–5999Assigned MCC TELEPHONY LLC 593K CARUTHRSVL MO
2019-11-14 573-930-5XXX 5000–5999Assigned MCC TELEPHONY LLC 593K HAYTI MO
2019-11-11 573-899-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E ST JAMES MO
2019-11-08 573-426-0XXX 0000–0999Assigned FIDELITY CABLEVISION, LLC 3275 ROLLA MO
2019-11-08 573-485-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E EOLIA MO
2019-11-08 573-679-0XXX 0000–0999Assigned FIDELITY CABLEVISION, LLC 3356 BOURBON MO
2019-11-05 573-899-0XXX 0000–0999Assigned FIDELITY CABLEVISION, LLC 3356 ST JAMES MO
2019-10-31 573-294-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F MORRISON MO
2019-10-31 573-422-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F VIENNA MO
2019-10-31 573-422-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F VIENNA MO
2019-10-31 573-455-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F WESTPHALIA MO
2019-10-31 573-455-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F WESTPHALIA MO
2019-10-31 573-488-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F ASHLAND MO
2019-10-31 573-488-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F ASHLAND MO
2019-10-31 573-496-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F BRAZITO MO
2019-10-31 573-496-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F BRAZITO MO
2019-10-31 573-498-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F EUGENE MO
2019-10-31 573-498-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F EUGENE MO
2019-10-31 573-508-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F TAOS MO
2019-10-31 573-520-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F RUSSELLVL MO
2019-10-31 573-520-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F RUSSELLVL MO
2019-10-31 573-533-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CENTERTOWN MO
2019-10-31 573-533-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CENTERTOWN MO
2019-10-31 573-641-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CLARK MO
2019-10-31 573-641-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F CLARK MO
2019-10-31 573-687-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F STURGEON MO
2019-10-31 573-691-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F JEFFERSNCY MO
2019-10-31 573-691-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F JEFFERSNCY MO
2019-10-31 573-698-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F ROCHEPORT MO
2019-10-31 573-728-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F ARGYLE MO
2019-10-31 573-728-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F ARGYLE MO
2019-10-31 573-744-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F FREEBURG MO
2019-10-31 573-744-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F FREEBURG MO
2019-10-31 573-763-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CHAMOIS MO
2019-10-31 573-763-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CHAMOIS MO
2019-10-31 573-787-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CLARKSBURG MO
2019-10-31 573-787-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F CLARKSBURG MO
2019-10-31 573-799-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F LINN MO
2019-10-31 573-799-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F LINN MO
2019-10-31 573-943-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F MTSTERLING MO
2019-10-31 573-969-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CENTRALIA MO
2019-10-31 573-969-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CENTRALIA MO
2019-10-29 573-261-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F ST JAMES MO
2019-10-29 573-261-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F ST JAMES 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.