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
2017-12-12 337-345-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2017-12-12 337-350-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CENTERVL LA
2017-12-12 337-393-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RAYNE LA
2017-12-12 337-414-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BREAUX BDG LA
2017-12-12 337-420-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BALDWIN LA
2017-12-12 337-434-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HENDERSON LA
2017-12-12 337-444-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PARKS LA
2017-12-12 337-449-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ARNAUDVL LA
2017-12-12 337-454-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CECELIA LA
2017-12-12 337-471-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FRANKLIN LA
2017-12-12 337-490-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DELCAMBRE LA
2017-12-12 337-520-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CARENCRO LA
2017-12-12 337-561-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DUSON LA
2017-12-12 337-573-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J YOUNGSVL LA
2017-12-12 337-608-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NEW IBERIA LA
2017-12-12 337-636-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J JEANERETTE LA
2017-12-12 337-944-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LOREAUVL LA
2017-12-06 337-283-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ABBEVILLE LA
2017-11-08 337-570-3XXX 3000–3999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-11-08 337-570-4XXX 4000–4999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-11-08 337-570-5XXX 5000–5999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-11-08 337-570-6XXX 6000–6999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-10-18 337-345-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LAFAYETTE LA
2017-10-18 337-345-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LAFAYETTE LA
2017-09-27 337-345-6XXX 6000–6999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2017-09-26 337-252-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F BROUSSARD LA
2017-09-22 337-930-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WELSH LA
2017-09-21 337-703-5XXX 5000–5999Assigned METROPCS, INC. 5562 LAFAYETTE LA
2017-08-31 337-603-3XXX 3000–3999Assigned METROPCS, INC. 5562 EUNICE LA
2017-08-01 337-603-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 EUNICE LA
2017-07-18 337-390-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C KINDER LA
2017-07-13 337-532-9XXX 9000–9999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-07-13 337-570-7XXX 7000–7999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-07-13 337-570-8XXX 8000–8999Assigned METROPCS, INC. 5562 LK CHARLES LA
2017-07-10 337-573-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 YOUNGSVL LA
2017-06-23 337-724-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHATAIGNIR LA
2017-06-21 337-306-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F RAYNE LA
2017-06-07 337-703-9XXX 9000–9999Assigned VOICESTREAM GSM I, LLC 150C LAFAYETTE LA
2017-06-05 337-312-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E LK CHARLES LA
2017-06-02 337-561-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DUSON LA
2017-06-02 337-703-0XXX 0000–0999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2017-06-02 337-918-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ERATH LA
2017-05-23 337-703-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LAFAYETTE LA
2017-05-05 337-520-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 CARENCRO LA
2017-05-02 337-282-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F GUEYDAN LA
2017-05-02 337-382-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F ABBEVILLE LA
2017-05-02 337-428-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F JEANERETTE LA
2017-05-02 337-428-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F JEANERETTE LA
2017-04-24 337-227-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHURCH PT LA
2017-04-24 337-612-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IOTA 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.