NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 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
Clear Download CSV ↓
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 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.