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 309
LEVEL 3 COMMUNICATIONS, LLC - IL 120
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
2025-12-19 309-785-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CUBA IL
2024-01-17 309-623-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOLINE IL
2023-02-09 309-988-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LACON IL
2023-02-03 309-640-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HAVANA IL
2023-01-24 309-849-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 METAMORA IL
2022-10-04 309-842-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GERMATNHLS IL
2022-01-31 309-515-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ERIE IL
2021-12-23 309-858-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BIGGSVILLE IL
2021-03-02 309-650-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PEKIN IL
2021-02-15 309-564-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EL PASO IL
2020-10-09 309-987-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CORDOVA IL
2020-04-07 309-520-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKISLAND IL
2020-03-19 309-604-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FARMINGTON IL
2019-07-09 309-524-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOLINE IL
2019-06-10 309-548-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROSEVILLE IL
2019-06-10 309-598-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 KIRKWOOD IL
2018-11-14 309-808-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLOOMINGTN IL
2018-09-27 309-315-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GALESBURG IL
2018-07-17 309-581-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOLINE IL
2017-05-23 309-490-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LEXINGTON IL
2016-12-13 309-205-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLOOMINGTN IL
2016-10-03 309-374-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 KEITHSBURG IL
2016-10-03 309-584-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 JOY IL
2016-10-03 309-586-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SEATON IL
2016-10-03 309-587-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEW BOSTON IL
2016-10-03 309-729-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LITTLEYORK IL
2016-09-08 309-559-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OQUAWKA IL
2016-09-07 309-843-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALEXIS IL
2016-07-22 309-545-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TALBOTT IL
2016-07-18 309-382-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHPEKIN IL
2016-07-18 309-535-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TOPEKA IL
2016-07-18 309-597-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FORESTCITY IL
2016-07-18 309-968-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MANITO IL
2016-07-06 309-466-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EUREKA IL
2016-07-05 309-240-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DUNLAP IL
2016-07-01 309-300-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SOUTHPEKIN IL
2016-07-01 309-301-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TOULON IL
2016-06-29 309-356-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HENRY IL
2016-06-29 309-977-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GREEN VLY IL
2016-06-28 309-603-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHILLICOTH IL
2015-12-01 309-430-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKISLAND IL
2015-07-27 309-434-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLOOMINGTN IL
2014-12-15 309-226-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CANTON IL
2014-09-26 309-205-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BLOOMINGTN IL
2014-09-26 309-588-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MACOMB IL
2014-07-10 309-873-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GULFPORT IL
2014-06-25 309-289-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 KNOXVILLE IL
2014-06-25 309-801-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STRONGHST IL
2014-06-19 309-563-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CAMERON IL
2014-05-14 309-955-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WATAGA IL

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.