NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

21 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, 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
2005-10-17 337-321-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2005-10-17 337-321-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2005-10-17 337-321-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2005-10-13 337-326-3XXX 3000–3999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2005-09-27 337-303-0XXX 0000–0999Assigned METROPCS, INC. 5562 LAFAYETTE LA
2005-09-27 337-309-5XXX 5000–5999Assigned METROPCS, INC. 5562 LK CHARLES LA
2005-09-27 337-309-6XXX 6000–6999Assigned METROPCS, INC. 5562 LK CHARLES LA
2005-09-14 337-256-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NEW IBERIA LA
2005-09-07 337-504-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2005-09-07 337-504-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2005-08-09 337-256-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2005-08-09 337-308-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OPELOUSAS LA
2005-06-22 337-254-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-06-22 337-309-3XXX 3000–3999Assigned METROPCS, INC. 5562 LK CHARLES LA
2005-06-22 337-718-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2005-06-22 337-718-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2005-06-22 337-852-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-06-22 337-852-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-06-22 337-852-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-06-22 337-852-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-05-17 337-579-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JEANERETTE LA
2005-05-09 337-309-4XXX 4000–4999Assigned METROPCS, INC. 5562 LK CHARLES LA
2005-05-03 337-505-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-05-03 337-505-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-04-28 337-806-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LAFAYETTE LA
2005-04-28 337-806-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LAFAYETTE LA
2005-04-26 337-202-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J DE RIDDER LA
2005-04-26 337-246-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J JENNINGS LA
2005-04-26 337-350-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CENTERVL LA
2005-04-26 337-407-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J OPELOUSAS LA
2005-04-22 337-342-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J STMARTINVL LA
2005-04-22 337-385-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J ABBEVILLE LA
2005-03-30 337-377-5XXX 5000–5999Assigned METROPCS, INC. 5562 LK CHARLES LA
2005-03-24 337-378-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2005-03-24 337-378-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2005-03-24 337-378-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2005-03-08 337-315-8XXX 8000–8999Assigned METROPCS, INC. 5562 LAFAYETTE LA
2005-03-08 337-326-9XXX 9000–9999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2005-03-03 337-504-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2005-03-03 337-504-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2005-02-23 337-459-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2005-02-23 337-459-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE 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.