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
2016-07-25 573-261-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST JAMES MO
2016-07-25 573-273-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F ADVANCE MO
2016-07-25 573-273-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F ADVANCE MO
2016-07-25 573-419-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAFFEE MO
2016-07-25 573-500-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMPBELL MO
2016-07-25 573-616-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K JEFFERSNCY MO
2016-07-15 573-476-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2016-07-15 573-476-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2016-07-15 573-476-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2016-07-05 573-466-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROLLA MO
2016-07-05 573-612-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROLLA MO
2016-06-22 573-328-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E QULIN MO
2016-06-14 573-476-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2016-06-03 573-561-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 FREDERCKTN MO
2016-05-31 573-591-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEXICO MO
2016-05-31 573-591-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEXICO MO
2016-05-19 573-713-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FARMINGTON MO
2016-05-13 573-570-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PERRY MO
2016-05-13 573-731-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MONROECITY MO
2016-05-13 573-938-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E STOUTSVL MO
2016-05-03 573-889-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LICKING MO
2016-05-02 573-292-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2016-05-02 573-292-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2016-05-02 573-725-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LOUISIANA MO
2016-04-27 573-772-3XXX 3000–3999Assigned METROPCS, INC. 5562 POPLAR BLF MO
2016-04-15 573-393-7XXX 7000–7999Assigned METROPCS, INC. 5562 WESTQUINCY MO
2016-04-11 573-554-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLUMBIA MO
2016-04-07 573-616-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2016-04-07 573-616-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2016-04-07 573-616-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2016-04-01 573-398-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCOTT CITY MO
2016-03-29 573-607-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2016-03-29 573-607-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2016-03-22 573-413-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2016-03-22 573-413-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2016-03-22 573-413-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2016-03-22 573-414-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEXTER MO
2016-03-22 573-414-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEXTER MO
2016-03-17 573-550-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F FULTON MO
2016-03-17 573-550-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F FULTON MO
2016-03-17 573-828-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F VANDALIA MO
2016-03-17 573-828-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VANDALIA MO
2016-03-16 573-240-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F CENTER MO
2016-03-16 573-240-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F CENTER MO
2016-03-16 573-606-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 JEFFERSNCY MO
2016-03-16 573-784-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F FRANKFORD MO
2016-03-16 573-784-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F FRANKFORD MO
2016-03-15 573-284-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F VERSAILLES MO
2016-03-15 573-284-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F VERSAILLES MO
2016-03-15 573-304-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 CALIFORNIA 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.