NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 901
TELEPORT COMMUNICATIONS AMERICA, LLC - TN 61
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
2021-10-11 901-565-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2021-08-10 901-558-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2021-06-25 901-902-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2021-06-21 901-519-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2021-05-06 901-902-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-10-21 901-467-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-08-14 901-455-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-07-08 901-450-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-03-01 901-427-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-01-25 901-446-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F COLLIERVL TN
2019-01-03 901-436-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-01-03 901-436-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-01-03 901-436-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-01-03 901-436-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-01-03 901-436-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-30 901-478-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-10-10 901-243-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MUNFORD TN
2018-09-25 901-407-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MILLINGTON TN
2018-04-11 901-390-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-04-11 901-390-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2018-01-17 901-701-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2017-03-28 901-805-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2017-03-28 901-805-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-10-12 901-707-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-10-12 901-707-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-10-12 901-707-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-10-12 901-707-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-10-05 901-472-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F COLLIERVL TN
2016-08-15 901-930-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-03-21 901-616-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F ARLINGTON TN
2016-02-26 901-666-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2016-02-26 901-666-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2015-04-30 901-498-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2015-04-30 901-498-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-12-13 901-801-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-12-13 901-801-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-08-27 901-424-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F SOMERVILLE TN
2013-05-10 901-505-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-05-10 901-505-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-05-10 901-505-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2013-02-22 901-509-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.