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
2011-11-29 573-827-4XXX 4000–4999Assigned WINDSTREAM MISSOURI, INC. 1885 DONIPHAN MO
2011-11-28 573-290-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAPEGIRARD MO
2011-11-28 573-719-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HANNIBAL MO
2011-11-18 573-539-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VERSAILLES MO
2011-11-18 573-755-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F JACKSON MO
2011-11-15 573-514-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2011-11-15 573-514-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2011-11-15 573-514-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2011-11-15 573-818-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2011-11-14 573-616-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K JEFFERSNCY MO
2011-10-27 573-719-4XXX 4000–4999Assigned UNITED STATES CELLULAR - MO 6275 HANNIBAL MO
2011-10-27 573-748-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E NEW MADRID MO
2011-10-21 573-616-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2011-10-21 573-616-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2011-10-20 573-397-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2011-10-20 573-825-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2011-10-14 573-755-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E JACKSON MO
2011-09-30 573-458-9XXX 9000–9999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ROLLA MO
2011-09-30 573-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEW MADRID MO
2011-09-30 573-767-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MONTICELLO MO
2011-09-26 573-525-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAMDENTON MO
2011-09-23 573-722-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E ADVANCE MO
2011-09-22 573-246-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CAMPBELL MO
2011-09-22 573-262-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ORAN MO
2011-09-22 573-427-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON MO
2011-09-22 573-440-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FREDERCKTN MO
2011-09-22 573-557-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C ELDON MO
2011-09-22 573-568-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BLOOMFIELD MO
2011-09-22 573-621-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SIKESTON MO
2011-09-22 573-643-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARSTON MO
2011-09-22 573-649-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C E PRAIRIE MO
2011-09-22 573-654-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CARDWELL MO
2011-09-22 573-688-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C LILBOURN MO
2011-09-22 573-722-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C ADVANCE MO
2011-09-22 573-738-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SENATH MO
2011-09-22 573-741-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARBLEHILL MO
2011-09-22 573-748-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C NEW MADRID MO
2011-09-22 573-755-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JACKSON MO
2011-09-22 573-833-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C POCAHONTAS MO
2011-09-22 573-919-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KENNETT MO
2011-09-22 573-964-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LKOZKOSBCH MO
2011-09-20 573-360-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E E PRAIRIE MO
2011-09-20 573-838-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIKESTON MO
2011-09-20 573-838-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIKESTON MO
2011-09-19 573-691-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JEFFERSNCY MO
2011-09-19 573-714-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2011-09-15 573-382-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2011-09-15 573-826-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FULTON MO
2011-09-15 573-891-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEXTER MO
2011-09-15 573-891-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEXTER 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.