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 337
AT&T ENTERPRISES, LLC 35
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
2024-05-03 337-867-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WEEKS IS LA
2013-01-23 337-245-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SWEET LAKE LA
2013-01-23 337-372-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MERRYVILLE LA
2011-08-15 337-202-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C DE RIDDER LA
2011-08-15 337-223-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GUEYDAN LA
2011-08-15 337-275-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JENNINGS LA
2011-08-15 337-324-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C VINTON LA
2011-08-15 337-330-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BROUSSARD LA
2011-08-15 337-422-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ABBEVILLE LA
2011-08-15 337-428-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JEANERETTE LA
2011-08-15 337-435-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEONVILLE LA
2011-08-15 337-546-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C EUNICE LA
2011-08-15 337-548-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKEARTHUR LA
2011-08-15 337-565-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CARENCRO LA
2011-08-15 337-566-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KROTZ SPG LA
2011-08-15 337-623-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C MELVILLE LA
2011-08-15 337-628-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WASHINGTON LA
2011-08-15 337-680-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C STMARTINVL LA
2011-08-15 337-766-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAWTELL LA
2011-08-15 337-777-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PORT BARRE LA
2011-08-15 337-918-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ERATH LA
2011-08-15 337-935-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DUSON LA
2011-08-15 337-944-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LOREAUVL LA
2011-05-24 337-321-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C NEW IBERIA LA
2011-05-24 337-407-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OPELOUSAS LA
2011-05-24 337-423-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEESVILLE LA
2011-05-24 337-427-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RAYNE LA
2011-05-24 337-429-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LK CHARLES LA
2011-05-24 337-484-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C LAFAYETTE LA
2011-05-24 337-514-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CROWLEY LA
2011-04-29 337-350-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CENTERVL LA
2011-04-29 337-476-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SULPHUR LA
2011-04-29 337-940-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BALDWIN LA
2011-02-08 337-573-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C YOUNGSVL LA
2009-12-29 337-471-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FRANKLIN LA

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.