NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 337
LEVEL 3 COMMUNICATIONS, LLC - LA 96
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2025-03-14 337-645-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JOHNSOBYOU LA
2024-11-12 337-518-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VL PLATTE LA
2024-09-24 337-236-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAFAYETTE LA
2022-11-02 337-416-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 REEVES LA
2022-09-29 337-841-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAWTELL LA
2022-08-03 337-220-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 TURKEY CRK LA
2022-08-03 337-724-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CHATAIGNIR LA
2022-08-03 337-727-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 PINEPRAIRI LA
2022-04-26 337-285-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KAPLAN LA
2022-03-22 337-999-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BROUSSARD LA
2021-05-18 337-391-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 IOWA LA
2021-04-01 337-545-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CENTERVL LA
2020-10-28 337-200-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BASILE LA
2020-10-28 337-455-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BREAUX BDG LA
2020-10-28 337-472-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MAMOU LA
2020-10-28 337-847-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ARNAUDVL LA
2020-10-13 337-684-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CHURCH PT LA
2020-09-25 337-336-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VL PLATTE LA
2020-06-30 337-636-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JEANERETTE LA
2020-04-07 337-525-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DE QUINCY LA
2020-02-18 337-321-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEW IBERIA LA
2019-06-17 337-510-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SUNSET LA
2019-06-06 337-229-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LOREAUVL LA
2019-06-06 337-447-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 OPELOUSAS LA
2019-01-28 337-469-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CARENCRO LA
2018-11-30 337-372-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MERRYVILLE LA
2018-01-17 337-388-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 JENNINGS LA
2017-08-01 337-603-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 EUNICE LA
2016-01-19 337-607-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SULPHUR LA
2015-01-22 337-753-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ROANOKE LA
2015-01-20 337-301-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ELTON LA
2015-01-20 337-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 WELSH LA
2015-01-20 337-977-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 OBERLIN LA
2015-01-20 337-998-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 KINDER LA
2014-12-29 337-516-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ABBEVILLE LA
2014-09-10 337-668-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CANKTON LA
2014-08-22 337-587-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 THORNWELL LA
2014-08-22 337-588-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LACASSINE LA
2014-08-22 337-756-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 FENTON LA
2014-08-20 337-725-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 RAGLEY LA
2014-08-20 337-743-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 STARKS LA
2014-08-20 337-779-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 IOTA LA
2014-08-08 337-404-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA
2014-08-08 337-435-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEONVILLE LA
2014-08-08 337-448-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MELVILLE LA
2014-08-07 337-346-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 FRANKLIN LA
2014-08-07 337-403-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 HAYES LA
2014-08-07 337-434-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 HENDERSON LA
2014-08-07 337-444-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 PARKS LA
2014-08-07 337-454-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CECELIA 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.