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
2013-04-08 573-479-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F HAYTI MO
2013-04-08 573-483-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BLOOMSDALE MO
2013-04-08 573-483-4XXX 4000–4999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BLOOMSDALE MO
2013-04-08 573-517-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F PERRYVILLE MO
2013-04-08 573-521-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F NEW MADRID MO
2013-04-08 573-521-3XXX 3000–3999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F NEW MADRID MO
2013-04-08 573-525-5XXX 5000–5999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CAMDENTON MO
2013-04-08 573-525-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CAMDENTON MO
2013-04-08 573-547-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F PERRYVILLE MO
2013-04-08 573-557-4XXX 4000–4999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ELDON MO
2013-04-08 573-557-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ELDON MO
2013-04-08 573-560-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F LOUISIANA MO
2013-04-08 573-568-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BLOOMFIELD MO
2013-04-08 573-574-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MONTGORYCY MO
2013-04-08 573-574-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MONTGORYCY MO
2013-04-08 573-575-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CARUTHRSVL MO
2013-04-08 573-575-3XXX 3000–3999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CARUTHRSVL MO
2013-04-08 573-603-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F HANNIBAL MO
2013-04-08 573-603-2XXX 2000–2999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F HANNIBAL MO
2013-04-08 573-653-5XXX 5000–5999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F DEERING MO
2013-04-08 573-653-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F DEERING MO
2013-04-08 573-664-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F FARMINGTON MO
2013-04-08 573-664-3XXX 3000–3999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F FARMINGTON MO
2013-04-08 573-667-2XXX 2000–2999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MOREHOUSE MO
2013-04-08 573-667-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MOREHOUSE MO
2013-04-08 573-683-8XXX 8000–8999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CHARLESTON MO
2013-04-08 573-723-3XXX 3000–3999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F LKOZKOSBCH MO
2013-04-08 573-723-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F LKOZKOSBCH MO
2013-04-08 573-741-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MARBLEHILL MO
2013-04-08 573-741-7XXX 7000–7999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MARBLEHILL MO
2013-04-08 573-754-9XXX 9000–9999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F LOUISIANA MO
2013-04-08 573-755-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F JACKSON MO
2013-04-08 573-755-3XXX 3000–3999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F JACKSON MO
2013-04-08 573-824-7XXX 7000–7999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ALTEBGFRHN MO
2013-04-08 573-824-8XXX 8000–8999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F ALTEBGFRHN MO
2013-04-08 573-878-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BEAUFORT MO
2013-04-08 573-878-2XXX 2000–2999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BEAUFORT MO
2013-04-08 573-887-8XXX 8000–8999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CHAFFEE MO
2013-04-08 573-891-4XXX 4000–4999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F DEXTER MO
2013-04-08 573-891-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F DEXTER MO
2013-04-08 573-895-6XXX 6000–6999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F BLOOMFIELD MO
2013-04-08 573-919-1XXX 1000–1999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F KENNETT MO
2013-04-08 573-919-9XXX 9000–9999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F KENNETT MO
2013-04-08 573-990-0XXX 0000–0999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F MALDEN MO
2013-04-03 573-213-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 BOWLNGGREN MO
2013-04-03 573-321-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ADVANCE MO
2013-04-01 573-315-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 FLAT RIVER MO
2013-03-29 573-922-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 CARUTHRSVL MO
2013-03-27 573-271-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAPEGIRARD MO
2013-03-27 573-606-1XXX 1000–1999Assigned NUSO, LLC 551G JEFFERSNCY 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.