NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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 225
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 19
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
2021-12-14 225-471-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LUTCHER LA
2016-11-14 225-605-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 CLINTON LA
2016-10-31 225-666-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2016-02-09 225-713-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 NEW ROADS LA
2014-10-31 225-399-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 CONVENT LA
2014-10-02 225-442-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2013-08-08 225-692-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 PLAQUEMINE LA
2013-08-07 225-407-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2010-11-01 225-283-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LIVINGSTON LA
2010-11-01 225-532-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 ALBANY LA
2010-03-05 225-372-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2010-01-12 225-257-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 DONALDSNVL LA
2009-09-04 225-314-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 ST GABRIEL LA
2008-06-25 225-663-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2008-05-16 225-306-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 ZACHARY LA
2007-03-07 225-663-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2007-03-07 225-663-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2007-03-07 225-663-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 BATONROUGE LA
2007-02-05 225-271-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 DENHAM SPG LA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.