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
2020-10-14 573-800-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CENTER MO
2020-10-14 573-969-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F CENTRALIA MO
2020-10-14 573-969-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F CENTRALIA MO
2020-10-12 573-995-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F BELLFLOWER MO
2020-10-12 573-995-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F BELLFLOWER MO
2020-10-09 573-345-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2020-10-09 573-347-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2020-10-09 573-549-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F MIDDLETOWN MO
2020-10-09 573-549-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F MIDDLETOWN MO
2020-10-09 573-710-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F MARTINSBG MO
2020-10-09 573-710-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F MARTINSBG MO
2020-10-09 573-787-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F CLARKSBURG MO
2020-10-09 573-787-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F CLARKSBURG MO
2020-10-08 573-383-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F CANTON MO
2020-10-08 573-383-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F CANTON MO
2020-10-08 573-696-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F HALLSVILLE MO
2020-10-08 573-696-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F HALLSVILLE MO
2020-10-07 573-870-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F VAN BUREN MO
2020-10-07 573-870-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VAN BUREN MO
2020-10-06 573-699-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F SAFE MO
2020-10-06 573-699-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F SAFE MO
2020-10-01 573-848-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 STEELE MO
2020-09-29 573-500-4XXX 4000–4999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CAMPBELL MO
2020-09-29 573-524-2XXX 2000–2999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MACKSCREEK MO
2020-09-28 573-384-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F SILEX MO
2020-09-28 573-566-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F STOVER MO
2020-09-28 573-656-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F OLNEY MO
2020-09-28 573-669-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F NEW HARTFD MO
2020-09-25 573-691-1XXX 1000–1999Assigned UNITED STATES CELLULAR - MO 6275 JEFFERSNCY MO
2020-09-24 573-932-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAMDENTON MO
2020-09-08 573-530-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2020-09-08 573-630-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 BONNETERRE MO
2020-09-04 573-302-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LKOZKOSBCH MO
2020-09-04 573-530-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2020-09-04 573-530-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2020-09-04 573-530-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2020-09-04 573-900-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PERRYVILLE MO
2020-08-27 573-566-6XXX 6000–6999Assigned FRACTEL, LLC 965H STOVER MO
2020-08-27 573-655-5XXX 5000–5999Assigned FRACTEL, LLC 965H LA GRANGE MO
2020-08-27 573-699-9XXX 9000–9999Assigned FRACTEL, LLC 965H SAFE MO
2020-08-27 573-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H BIGSPRING MO
2020-08-26 573-530-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2020-08-26 573-540-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 COLUMBIA MO
2020-08-26 573-540-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 COLUMBIA MO
2020-08-26 573-540-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 COLUMBIA MO
2020-08-24 573-512-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FTLENARDWD MO
2020-08-24 573-604-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINONA MO
2020-08-20 573-440-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREDERCKTN MO
2020-08-20 573-696-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HALLSVILLE MO
2020-08-11 573-519-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CAPEGIRARD 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.