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
2011-08-15 337-428-5XXX 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
2011-08-10 337-202-7XXX 7000–7999Assigned CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H DE RIDDER LA
2011-08-08 337-414-0XXX 0000–0999Assigned VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2011-08-04 337-476-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SULPHUR LA
2011-08-03 337-301-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ELTON LA
2011-08-02 337-240-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LK CHARLES LA
2011-07-28 337-306-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F RAYNE LA
2011-07-27 337-391-4XXX 4000–4999Assigned CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H IOWA LA
2011-07-26 337-275-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENNINGS LA
2011-07-13 337-804-1XXX 1000–1999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-07-13 337-804-3XXX 3000–3999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-07-13 337-804-5XXX 5000–5999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-07-11 337-331-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2011-07-11 337-417-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2011-07-11 337-564-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2011-07-05 337-306-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F RAYNE LA
2011-06-16 337-422-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2011-06-16 337-476-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2011-06-10 337-500-2XXX 2000–2999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-06-10 337-500-3XXX 3000–3999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-06-10 337-780-0XXX 0000–0999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2011-06-10 337-936-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2011-06-07 337-467-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2011-06-02 337-680-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 STMARTINVL LA
2011-06-02 337-935-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DUSON LA
2011-05-31 337-284-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F OPELOUSAS LA
2011-05-31 337-305-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F EUNICE LA
2011-05-31 337-352-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F NEW IBERIA LA
2011-05-31 337-404-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LEESVILLE LA
2011-05-31 337-706-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2011-05-31 337-706-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2011-05-31 337-706-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2011-05-25 337-240-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LK CHARLES LA
2011-05-25 337-240-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LK CHARLES LA
2011-05-25 337-240-8XXX 8000–8999Assigned CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H LK CHARLES LA
2011-05-25 337-247-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LAFAYETTE LA
2011-05-25 337-247-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LAFAYETTE 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.