NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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 337
ONVOY, LLC - LA 17
NEW CINGULAR WIRELESS PCS, LLC - GA 2
CSC WIRELESS, LLC 2
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
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
2011-05-23 337-393-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J RAYNE LA
2011-05-10 337-936-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2011-05-02 337-348-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE RIDDER LA
2011-05-02 337-422-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F ABBEVILLE 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
2011-04-14 337-451-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F YOUNGSVL LA
2011-04-13 337-467-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2011-04-11 337-534-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-04-06 337-441-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F STMARTINVL LA
2011-04-06 337-944-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LOREAUVL LA
2011-04-01 337-336-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 VL PLATTE LA
2011-03-25 337-347-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAFAYETTE LA
2011-03-16 337-534-8XXX 8000–8999Assigned LAFAYETTE CITY-PARISH CONSOLIDATED GOVERNMENT - LA 9002 LAFAYETTE LA
2011-03-16 337-889-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2011-03-14 337-376-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW IBERIA LA
2011-03-14 337-376-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C NEW IBERIA LA
2011-03-14 337-384-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2011-03-14 337-967-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2011-03-14 337-967-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2011-03-08 337-534-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-02-17 337-376-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW IBERIA LA
2011-02-16 337-500-1XXX 1000–1999Assigned GLOBAL DATA SYSTEMS, INC. - LA 606F LAFAYETTE LA
2011-02-14 337-534-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-02-10 337-376-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEW IBERIA LA
2011-02-08 337-573-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C YOUNGSVL LA
2011-02-04 337-714-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROUSSARD LA
2011-02-02 337-534-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-01-25 337-534-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-01-21 337-422-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2011-01-21 337-476-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2011-01-11 337-441-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 STMARTINVL LA
2011-01-11 337-717-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 CROWLEY LA
2011-01-06 337-534-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-01-06 337-936-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2011-01-04 337-777-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J PORT BARRE LA
2010-12-27 337-347-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LAFAYETTE LA
2010-11-08 337-442-3XXX 3000–3999Assigned VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2010-11-08 337-442-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2010-11-03 337-335-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW IBERIA LA
2010-11-03 337-335-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW IBERIA LA
2010-11-03 337-335-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEW IBERIA LA

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.