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
2021-10-06 573-536-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TAOS MO
2021-10-06 573-790-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CLARKSVL MO
2021-10-04 573-475-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J SIKESTON MO
2021-10-01 573-913-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BLOOMSDALE MO
2021-10-01 573-973-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K EOLIA MO
2021-09-28 573-973-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F EOLIA MO
2021-09-27 573-226-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2021-09-24 573-373-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F LADDONIA MO
2021-09-13 573-462-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2021-09-13 573-462-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2021-09-10 573-640-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E SILEX MO
2021-09-09 573-828-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E VANDALIA MO
2021-09-08 573-307-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E WINONA MO
2021-09-08 573-805-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEW MADRID MO
2021-09-08 573-935-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DEXTER MO
2021-09-08 573-935-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DEXTER MO
2021-09-08 573-935-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEXTER MO
2021-09-07 573-600-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HANNIBAL MO
2021-09-07 573-600-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HANNIBAL MO
2021-09-07 573-600-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HANNIBAL MO
2021-09-07 573-843-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CARUTHRSVL MO
2021-09-07 573-843-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CARUTHRSVL MO
2021-09-07 573-910-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FARMINGTON MO
2021-09-07 573-910-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FARMINGTON MO
2021-09-07 573-963-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 NEW MADRID MO
2021-09-03 573-425-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HUNNEWELL MO
2021-08-30 573-973-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F EOLIA MO
2021-08-27 573-601-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KENNETT MO
2021-08-25 573-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KENNETT MO
2021-08-24 573-306-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2021-08-24 573-307-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F WINONA MO
2021-08-24 573-992-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F MORRISON MO
2021-08-19 573-492-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARTINSBG MO
2021-08-19 573-503-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MIDDLETOWN MO
2021-08-17 573-804-1XXX 1000–1999Assigned COMMIO, LLC 939H SENATH MO
2021-08-17 573-804-9XXX 9000–9999Assigned COMMIO, LLC 939H SENATH MO
2021-08-16 573-812-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CUBA MO
2021-08-11 573-212-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ORAN MO
2021-08-11 573-419-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CHAFFEE MO
2021-08-11 573-530-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 COLUMBIA MO
2021-08-05 573-372-9XXX 9000–9999Assigned SOUTHWESTERN BELL 9533 GRAVOIS ML MO
2021-08-04 573-781-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2021-08-04 573-781-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2021-07-28 573-493-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F STELIZABTH MO
2021-07-26 573-740-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E BENTON MO
2021-07-22 573-307-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F WINONA MO
2021-07-19 573-306-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F EMINENCE MO
2021-06-25 573-282-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F MARBLEHILL MO
2021-06-25 573-389-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F OAK RIDGE MO
2021-06-25 573-396-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F RISCO 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.