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
2015-01-29 573-326-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARSTON MO
2015-01-29 573-375-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E ELDON MO
2015-01-29 573-381-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAPEGIRARD MO
2015-01-29 573-518-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FLAT RIVER MO
2015-01-29 573-609-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E POPLAR BLF MO
2015-01-21 573-873-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMDENTON MO
2015-01-20 573-554-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2015-01-20 573-554-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBIA MO
2015-01-16 573-931-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E SIKESTON MO
2014-12-17 573-720-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BLYTHEVL MO
2014-12-09 573-388-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPEGIRARD MO
2014-12-09 573-440-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREDERCKTN MO
2014-12-09 573-482-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2014-11-24 573-476-0XXX 0000–0999Assigned CHARITON VALLEY COMMUNICATIONS CORPORATION 250A COLUMBIA MO
2014-11-20 573-241-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CUBA MO
2014-11-20 573-325-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINONA MO
2014-11-20 573-390-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OLDAPPLETN MO
2014-11-20 573-390-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OLDAPPLETN MO
2014-11-20 573-419-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAFFEE MO
2014-11-20 573-605-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
2014-11-19 573-409-2XXX 2000–2999Assigned CHARITON VALLEY COMMUNICATIONS CORPORATION 250A HERMANN MO
2014-11-19 573-594-8XXX 8000–8999Assigned CHARITON VALLEY COMMUNICATIONS CORPORATION 250A VANDALIA MO
2014-11-17 573-975-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEXICO MO
2014-11-17 573-975-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEXICO MO
2014-11-14 573-869-0XXX 0000–0999Assigned CHARITON VALLEY COMMUNICATIONS CORPORATION 250A PALMYRA MO
2014-11-04 573-639-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2014-11-04 573-639-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2014-10-07 573-533-9XXX 9000–9999Assigned METROPCS, INC. 5562 CENTERTOWN MO
2014-09-30 573-381-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CAPEGIRARD MO
2014-09-30 573-584-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CENTERTOWN MO
2014-09-30 573-603-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HANNIBAL MO
2014-09-30 573-609-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2014-09-30 573-609-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2014-09-30 573-609-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POPLAR BLF MO
2014-09-30 573-644-0XXX 0000–0999Assigned METROPCS, INC. 5562 JEFFERSNCY MO
2014-09-30 573-647-7XXX 7000–7999Assigned METROPCS, INC. 5562 ROLLA MO
2014-09-30 573-814-8XXX 8000–8999Assigned METROPCS, INC. 5562 COLUMBIA MO
2014-09-26 573-554-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2014-09-25 573-539-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2014-09-25 573-539-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2014-09-25 573-789-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2014-09-03 573-607-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2014-09-03 573-607-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 COLUMBIA MO
2014-08-27 573-639-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2014-08-27 573-639-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2014-08-22 573-313-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E BENTON MO
2014-08-22 573-514-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 COLUMBIA MO
2014-07-29 573-253-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MEXICO MO
2014-07-29 573-544-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J FULTON MO
2014-07-29 573-591-0XXX 0000–0999Assigned CHARITON VALLEY COMMUNICATIONS CORPORATION 250A MEXICO 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.