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
2004-12-06 337-513-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LK CHARLES LA
2004-12-06 337-656-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LK CHARLES LA
2004-11-19 337-303-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-303-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-11-19 337-831-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2004-11-19 337-831-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2004-11-18 337-250-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2004-11-18 337-250-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2004-11-18 337-250-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2004-11-18 337-250-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2004-11-16 337-250-9XXX 9000–9999Assigned METROPCS, INC. 5562 CROWLEY LA
2004-10-27 337-990-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LK CHARLES LA
2004-10-22 337-409-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VINTON LA
2004-10-22 337-415-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SWEET LAKE LA
2004-10-19 337-857-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 YOUNGSVL LA
2004-10-19 337-935-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DUSON LA
2004-10-19 337-944-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LOREAUVL LA
2004-10-07 337-256-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
2004-10-07 337-308-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OPELOUSAS LA
2004-10-07 337-308-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OPELOUSAS LA
2004-10-06 337-254-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-06 337-254-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-06 337-254-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-06 337-254-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-06 337-254-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-06 337-254-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-10-05 337-513-1XXX 1000–1999Assigned METROPCS, INC. 5562 LK CHARLES LA
2004-08-25 337-285-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J KAPLAN LA
2004-08-18 337-250-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2004-08-18 337-412-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-08-18 337-412-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-08-18 337-831-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2004-08-13 337-326-2XXX 2000–2999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2004-07-26 337-349-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-07-26 337-412-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2004-07-22 337-935-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DUSON LA
2004-07-20 337-907-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J FRANKLIN LA
2004-07-20 337-918-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ERATH LA
2004-07-20 337-944-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LOREAUVL LA
2004-07-07 337-250-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CROWLEY LA
2004-07-07 337-256-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEW IBERIA LA
2004-07-07 337-330-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BROUSSARD LA
2004-07-07 337-342-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J STMARTINVL LA
2004-07-07 337-350-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CENTERVL LA
2004-07-07 337-385-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J 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.