NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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, all time — NPA 231
TELEPORT COMMUNICATIONS AMERICA, LLC - MI 43
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
2023-09-08 231-210-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ST JAMES MI
2023-07-03 231-500-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WHITEHALL MI
2023-01-06 231-417-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PETOSKEY MI
2022-10-19 231-732-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MORLEY MI
2022-03-08 231-324-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HARBOR SPG MI
2021-03-31 231-559-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MCBAIN MI
2020-12-03 231-567-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-12-03 231-567-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2020-11-09 231-227-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HONOR MI
2020-07-28 231-879-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E FIFE LAKE MI
2020-07-22 231-383-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E BEULAH MI
2019-11-14 231-493-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E TRAVERSECY MI
2019-11-01 231-253-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CADILLAC MI
2016-09-21 231-844-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E INDIAN RIV MI
2016-09-12 231-427-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MACKINAWCY MI
2016-09-12 231-508-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ONEKAMA MI
2016-07-07 231-787-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WHITECLOUD MI
2016-04-18 231-907-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LUDINGTON MI
2016-02-19 231-259-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E SHELBY MI
2016-02-19 231-625-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CHEBOYGAN MI
2015-11-11 231-835-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GLEN LAKE MI
2015-06-11 231-715-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E TRAVERSECY MI
2013-08-08 231-484-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E EASTJORDAN MI
2013-07-11 231-256-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LKLEELANAU MI
2013-07-11 231-432-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E NORTHPORT MI
2013-07-11 231-497-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E BOYNE CITY MI
2013-07-11 231-538-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E FREMONT MI
2013-07-11 231-676-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E BELLAIRE MI
2013-07-11 231-680-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E REED CITY MI
2013-07-11 231-923-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HART MI
2012-12-14 231-767-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MUSKEGON MI
2011-12-08 231-887-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MANISTEE MI
2011-05-17 231-303-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E NEWAYGO MI
2009-09-23 231-527-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E BIG RAPIDS MI
2008-08-20 231-942-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CADILLAC MI
2008-08-08 231-518-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E KALKASKA MI
2007-12-17 231-753-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PETOSKEY MI
2007-11-29 231-437-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CHARLEVOIX MI
2007-11-05 231-944-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E TRAVERSECY MI
2006-07-24 231-753-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PETOSKEY MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.