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
2020-09-02 337-545-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C CENTERVL LA
2020-09-01 337-331-8XXX 8000–8999Assigned VOICESTREAM GSM I, LLC 150C OPELOUSAS LA
2020-09-01 337-331-9XXX 9000–9999Assigned VOICESTREAM GSM I, LLC 150C OPELOUSAS LA
2020-09-01 337-398-0XXX 0000–0999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2020-09-01 337-398-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CROWLEY LA
2020-09-01 337-398-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F CROWLEY LA
2020-09-01 337-398-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2020-09-01 337-398-5XXX 5000–5999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2020-09-01 337-398-6XXX 6000–6999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2020-09-01 337-398-9XXX 9000–9999Assigned VOICESTREAM GSM I, LLC 150C CROWLEY LA
2020-09-01 337-467-6XXX 6000–6999Assigned VOICESTREAM GSM I, LLC 150C OPELOUSAS LA
2020-08-27 337-512-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C CARLYSS LA
2020-08-17 337-270-2XXX 2000–2999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-08-17 337-270-3XXX 3000–3999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-08-17 337-270-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E LAFAYETTE LA
2020-08-06 337-267-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2020-07-29 337-701-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 EUNICE LA
2020-07-27 337-701-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE LA
2020-07-16 337-525-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE QUINCY LA
2020-07-16 337-525-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE QUINCY LA
2020-07-07 337-388-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENNINGS LA
2020-06-30 337-636-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JEANERETTE LA
2020-06-26 337-677-8XXX 8000–8999Assigned METROPCS, INC. 5562 LK CHARLES LA
2020-06-26 337-677-9XXX 9000–9999Assigned METROPCS, INC. 5562 LK CHARLES LA
2020-06-19 337-486-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STMARTINVL LA
2020-06-12 337-358-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 IOWA LA
2020-06-12 337-495-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE RIDDER LA
2020-06-12 337-858-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 YOUNGSVL LA
2020-06-12 337-915-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARENCRO LA
2020-06-11 337-907-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F FRANKLIN LA
2020-06-10 337-930-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WELSH LA
2020-05-28 337-307-5XXX 5000–5999Assigned ONVOY, LLC - LA 749E KROTZ SPG LA
2020-05-28 337-307-6XXX 6000–6999Assigned ONVOY, LLC - LA 749E KROTZ SPG LA
2020-05-28 337-410-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 TURKEY CRK LA
2020-05-28 337-877-3XXX 3000–3999Assigned ONVOY, LLC - LA 749E VINTON LA
2020-05-28 337-877-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E VINTON LA
2020-05-14 337-389-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C OBERLIN LA
2020-04-24 337-345-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2020-04-24 337-345-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2020-04-23 337-382-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ABBEVILLE LA
2020-04-23 337-382-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ABBEVILLE LA
2020-04-07 337-525-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DE QUINCY LA
2020-04-06 337-512-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-04-06 337-512-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-04-06 337-512-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2020-04-02 337-420-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BALDWIN LA
2020-04-02 337-420-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BALDWIN LA
2020-03-30 337-227-9XXX 9000–9999Assigned ONVOY, LLC - LA 749E CHURCH PT LA
2020-03-30 337-282-7XXX 7000–7999Assigned ONVOY, LLC - LA 749E GUEYDAN LA
2020-03-30 337-317-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E DE QUINCY 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.