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
2023-10-27 573-974-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2023-10-27 573-974-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2023-10-26 573-861-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H JEFFERSNCY MO
2023-10-26 573-861-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H JEFFERSNCY MO
2023-10-26 573-861-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H JEFFERSNCY MO
2023-10-26 573-861-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H JEFFERSNCY MO
2023-10-26 573-861-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H JEFFERSNCY MO
2023-10-23 573-962-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-23 573-962-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-10-17 573-675-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J WYATT MO
2023-10-09 573-749-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IRONDALE MO
2023-09-29 573-316-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CARDWELL MO
2023-09-29 573-401-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ST MARYS MO
2023-09-25 573-434-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2023-09-25 573-434-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2023-09-25 573-630-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F BONNETERRE MO
2023-09-25 573-630-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F BONNETERRE MO
2023-09-25 573-630-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F BONNETERRE MO
2023-09-25 573-630-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F BONNETERRE MO
2023-09-25 573-630-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F BONNETERRE MO
2023-09-25 573-692-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2023-09-25 573-693-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2023-09-25 573-730-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F CAPEGIRARD MO
2023-09-25 573-902-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F PERRYVILLE MO
2023-09-25 573-936-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F MEXICO MO
2023-09-25 573-936-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F MEXICO MO
2023-09-25 573-936-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F MEXICO MO
2023-09-25 573-948-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F CAPEGIRARD MO
2023-09-25 573-948-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F CAPEGIRARD MO
2023-09-25 573-948-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F CAPEGIRARD MO
2023-09-25 573-952-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F FLAT RIVER MO
2023-09-25 573-952-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F FLAT RIVER MO
2023-09-25 573-952-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F FLAT RIVER MO
2023-09-25 573-964-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2023-09-25 573-968-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F COLUMBIA MO
2023-09-20 573-970-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2023-09-12 573-201-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROLLA MO
2023-09-05 573-970-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2023-09-01 573-292-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-918-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-918-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-947-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-947-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-947-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2023-09-01 573-947-3XXX 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.