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
2012-05-30 337-446-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2012-05-30 337-446-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2012-05-30 337-784-8XXX 8000–8999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2012-05-18 337-608-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J NEW IBERIA LA
2012-05-08 337-419-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2012-04-24 337-548-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LAKEARTHUR LA
2012-04-23 337-371-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2012-04-19 337-514-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2012-04-19 337-563-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2012-04-12 337-352-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEW IBERIA LA
2012-04-09 337-451-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J YOUNGSVL LA
2012-04-05 337-889-3XXX 3000–3999Assigned LAFAYETTE CITY-PARISH CONSOLIDATED GOVERNMENT - LA 9002 LAFAYETTE LA
2012-04-03 337-577-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2012-04-02 337-419-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LK CHARLES LA
2012-03-14 337-522-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2012-03-01 337-347-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAFAYETTE LA
2012-01-12 337-446-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2012-01-12 337-446-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2012-01-11 337-340-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F MERRYVILLE LA
2012-01-10 337-766-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LAWTELL LA
2012-01-06 337-350-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CENTERVL LA
2011-12-28 337-357-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F WEEKS IS LA
2011-12-28 337-435-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LEONVILLE LA
2011-12-19 337-655-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2011-12-19 337-655-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2011-11-29 337-524-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2011-11-28 337-223-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F GUEYDAN LA
2011-11-23 337-305-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 EUNICE LA
2011-11-16 337-990-5XXX 5000–5999Assigned CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H LK CHARLES LA
2011-11-04 337-990-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LK CHARLES LA
2011-10-18 337-476-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2011-10-17 337-414-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2011-10-14 337-381-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C OPELOUSAS LA
2011-10-14 337-381-6XXX 6000–6999Assigned VOICESTREAM GSM I, LLC 150C OPELOUSAS LA
2011-10-05 337-426-4XXX 4000–4999Assigned METROPCS, INC. 5562 LK CHARLES LA
2011-09-22 337-551-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW IBERIA LA
2011-09-22 337-628-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F WASHINGTON LA
2011-09-19 337-202-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F DE RIDDER LA
2011-09-19 337-446-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F LAFAYETTE LA
2011-09-19 337-458-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CROWLEY LA
2011-08-31 337-546-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE LA
2011-08-30 337-330-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROUSSARD LA
2011-08-30 337-422-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2011-08-30 337-704-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE 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

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.