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
2016-09-19 573-833-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F POCAHONTAS MO
2016-09-19 573-833-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F POCAHONTAS MO
2016-09-19 573-984-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F STEGNVIEVE MO
2016-09-19 573-984-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F STEGNVIEVE MO
2016-09-16 573-266-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F OAK RIDGE MO
2016-09-16 573-282-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F MARBLEHILL MO
2016-09-16 573-282-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F MARBLEHILL MO
2016-09-16 573-326-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F MARSTON MO
2016-09-16 573-363-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F MACKSCREEK MO
2016-09-16 573-363-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F MACKSCREEK MO
2016-09-16 573-371-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F HOLCOMB MO
2016-09-16 573-376-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F HORNERSVL MO
2016-09-16 573-385-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F LILBOURN MO
2016-09-16 573-501-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F HANNIBAL MO
2016-09-16 573-501-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F HANNIBAL MO
2016-09-16 573-551-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F KENNETT MO
2016-09-16 573-574-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F MONTGORYCY MO
2016-09-16 573-574-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F MONTGORYCY MO
2016-09-16 573-583-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F ORAN MO
2016-09-16 573-586-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FTLENARDWD MO
2016-09-16 573-591-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F MEXICO MO
2016-09-16 573-591-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F MEXICO MO
2016-09-16 573-725-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F LOUISIANA MO
2016-09-16 573-725-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F LOUISIANA MO
2016-09-16 573-746-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2016-09-16 573-746-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F LKOZKOSBCH MO
2016-09-16 573-788-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F OLDAPPLETN MO
2016-09-16 573-866-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F PATTON MO
2016-09-16 573-901-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F MALDEN MO
2016-09-16 573-987-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F JACKSON MO
2016-09-16 573-987-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F JACKSON MO
2016-09-15 573-242-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2016-09-15 573-242-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F CLARKSVL MO
2016-09-15 573-260-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2016-09-15 573-260-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F CLIMAX SPG MO
2016-09-15 573-279-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F WELLSVILLE MO
2016-09-15 573-279-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F WELLSVILLE MO
2016-09-15 573-312-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F ELSBERRY MO
2016-09-15 573-312-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F ELSBERRY MO
2016-09-15 573-314-3XXX 3000–3999Assigned ONVOY, LLC - MO 093F FRANKFORD MO
2016-09-15 573-314-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F FRANKFORD MO
2016-09-15 573-350-4XXX 4000–4999Assigned ONVOY, LLC - MO 093F DELTA MO
2016-09-15 573-360-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F E PRAIRIE MO
2016-09-15 573-361-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F ESSEX MO
2016-09-15 573-362-8XXX 8000–8999Assigned ONVOY, LLC - MO 093F FISK MO
2016-09-15 573-370-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F GIDEON MO
2016-09-15 573-402-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 WARDELL MO
2016-09-15 573-414-2XXX 2000–2999Assigned ONVOY, LLC - MO 093F DEXTER MO
2016-09-15 573-430-0XXX 0000–0999Assigned ONVOY, LLC - MO 093F FLAT RIVER MO
2016-09-15 573-430-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F FLAT RIVER 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.