NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 815
VERSATEL LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-09-09 815-931-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-09-09 815-994-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DIXON IL
2004-09-01 815-416-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MORRIS IL
2004-09-01 815-651-4XXX 4000–4999Assigned METROPCS, INC. 5562 JOLIET IL
2004-09-01 815-651-9XXX 9000–9999Assigned METROPCS, INC. 5562 JOLIET IL
2004-08-24 815-230-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 PLAINFIELD IL
2004-08-21 815-557-2XXX 2000–2999Assigned METROPCS, INC. 5562 JOLIET IL
2004-08-19 815-295-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2004-08-13 815-997-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROCKFORD IL
2004-08-10 815-302-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-08-10 815-867-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PONTIAC IL
2004-08-09 815-301-4XXX 4000–4999Assigned ONVOY, LLC 224C CRYSTAL LK IL
2004-08-09 815-560-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HARVARD IL
2004-08-03 815-277-5XXX 5000–5999Assigned ONVOY, LLC 224C FRANKFORT IL
2004-08-03 815-450-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOMENCE IL
2004-08-03 815-450-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOMENCE IL
2004-07-26 815-215-1XXX 1000–1999Assigned ONVOY, LLC 224C NEW LENOX IL
2004-07-26 815-306-3XXX 3000–3999Assigned ONVOY, LLC 224C LOCKPORT IL
2004-07-26 815-404-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CRYSTAL LK IL
2004-07-26 815-483-2XXX 2000–2999Assigned ONVOY, LLC 224C JOLIET IL
2004-07-26 815-676-3XXX 3000–3999Assigned ONVOY, LLC 224C PLAINFIELD IL
2004-07-07 815-230-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 PLAINFIELD IL
2004-07-06 815-931-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-07-06 815-931-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-07-02 815-402-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GALENA IL
2004-06-25 815-281-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IL 6265 GALENA IL
2004-06-25 815-281-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 GALENA IL
2004-06-25 815-281-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 GALENA IL
2004-06-25 815-281-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IL 6265 GALENA IL
2004-06-25 815-517-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DE KALB IL
2004-06-22 815-393-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MONROE CTR IL
2004-06-22 815-595-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OREGON IL
2004-06-22 815-824-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SHABBONA IL
2004-06-22 815-825-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MALTA IL
2004-06-22 815-853-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WENONA IL
2004-06-22 815-854-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LONG POINT IL
2004-06-21 815-384-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CRESTON IL
2004-06-21 815-569-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CAPRON IL
2004-06-21 815-580-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHERRY VLY IL
2004-06-21 815-945-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHENOA IL
2004-06-18 815-676-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K PLAINFIELD IL
2004-06-17 815-306-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K LOCKPORT IL
2004-06-17 815-717-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K NEW LENOX IL
2004-06-17 815-823-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2004-06-16 815-277-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K FRANKFORT IL
2004-06-16 815-508-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE KALB IL
2004-06-16 815-508-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE KALB IL
2004-06-14 815-823-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-06-14 815-823-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-06-10 815-858-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 ELIZABETH 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.