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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-01-04 815-692-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FAIRBURY IL
2005-01-04 815-893-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CRYSTAL LK IL
2004-12-27 815-912-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-12-27 815-975-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-12-27 815-975-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-12-20 815-671-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-12-20 815-823-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-12-09 815-230-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 PLAINFIELD IL
2004-12-07 815-608-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2004-12-06 815-975-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELVIDERE IL
2004-11-29 815-261-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2004-11-10 815-207-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 JOLIET IL
2004-11-05 815-412-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2004-11-05 815-975-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-11-02 815-515-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K WATSEKA IL
2004-11-02 815-642-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K MINOOKA IL
2004-11-02 815-650-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREEPORT IL
2004-10-28 815-412-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K FRANKFORT IL
2004-10-28 815-421-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K HERSCHER IL
2004-10-28 815-465-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K GRANT PARK IL
2004-10-28 815-473-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K WOODLAND IL
2004-10-28 815-486-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K DONOVAN IL
2004-10-28 815-506-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K UNION IL
2004-10-28 815-560-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K HARVARD IL
2004-10-28 815-698-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K ASHKUM IL
2004-10-27 815-315-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2004-10-27 815-410-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K LA SALLE IL
2004-10-27 815-561-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCHELLE IL
2004-10-27 815-573-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2004-10-21 815-272-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-10-19 815-608-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2004-10-18 815-404-4XXX 4000–4999Assigned METROPCS, INC. 5562 CRYSTAL LK IL
2004-10-18 815-414-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EARLVILLE IL
2004-10-18 815-414-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EARLVILLE IL
2004-10-08 815-994-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IL 6265 DIXON IL
2004-10-08 815-994-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 DIXON IL
2004-10-08 815-994-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 DIXON IL
2004-09-30 815-221-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LOCKPORT IL
2004-09-30 815-977-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-09-30 815-977-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-09-29 815-213-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-09-29 815-213-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-09-22 815-301-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2004-09-16 815-321-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WOODSTOCK IL
2004-09-15 815-207-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-09-15 815-207-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-09-14 815-642-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 MINOOKA IL
2004-09-09 815-915-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRINCETON IL
2004-09-09 815-915-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRINCETON IL
2004-09-09 815-931-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JOLIET 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.