NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 309
VERSATEL LLC 2
EXIANT COMMUNICATIONS LLC 2
BANDWIDTH.COM CLEC, LLC - IL 2
AHOI LLC 2
OPENTACT INC. 1
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
2004-06-22 309-455-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HOPEDALE IL
2004-06-22 309-473-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HEYWORTH IL
2004-06-22 309-481-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WASHINGTON IL
2004-06-22 309-565-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HANNA CITY IL
2004-06-22 309-726-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HUDSON IL
2004-06-22 309-753-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 IPAVA IL
2004-06-22 309-791-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ILLINOISCY IL
2004-06-22 309-822-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRING BAY IL
2004-06-22 309-874-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MCLEAN IL
2004-06-22 309-929-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TREMONT IL
2004-06-21 309-226-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CANTON IL
2004-06-21 309-228-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FARMINGTON IL
2004-06-21 309-244-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DELAVAN IL
2004-06-21 309-376-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARLOCK IL
2004-06-21 309-377-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CROPSEY IL
2004-06-21 309-378-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DOWNS IL
2004-06-21 309-722-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLFLOWER IL
2004-06-21 309-723-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLFAX IL
2004-06-21 309-724-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELLSWORTH IL
2004-06-21 309-727-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARROWSMITH IL
2004-06-21 309-789-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FIATT IL
2004-06-21 309-795-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EDGINGTON IL
2004-06-17 309-319-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 BLOOMINGTN IL
2004-06-03 309-606-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WYOMING IL
2004-06-03 309-761-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 KEWANEE IL
2004-04-30 309-243-3XXX 3000–3999Assigned FRONTIER NORTH, INC. - IL 1015 DUNLAP IL
2004-04-28 309-444-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IL
2004-04-28 309-642-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PEKIN IL
2004-04-15 309-868-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PEORIA IL
2004-03-11 309-312-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KEWANEE IL
2004-03-05 309-310-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BLOOMINGTN IL
2004-03-05 309-336-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BLOOMINGTN IL
2004-02-16 309-331-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 MACOMB IL
2004-02-16 309-331-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 MACOMB IL
2004-02-04 309-868-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PEORIA IL
2004-02-04 309-868-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PEORIA IL
2004-01-21 309-712-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-21 309-712-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IL 6265 PEORIA IL
2004-01-20 309-318-9XXX 9000–9999Assigned METROPCS, INC. 5562 MACOMB IL
2003-10-22 309-489-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GENESEO IL
2003-09-23 309-965-3XXX 3000–3999Assigned FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 GOODFIELD IL
2003-09-12 309-318-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MACOMB IL
2003-08-04 309-642-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PEKIN IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.