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
2004-02-16 815-572-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MARENGO IL
2004-02-16 815-821-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 FREEPORT IL
2004-02-16 815-821-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 FREEPORT IL
2004-02-16 815-821-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 FREEPORT IL
2004-02-16 815-821-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 FREEPORT IL
2004-02-16 815-821-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IL 6265 FREEPORT IL
2004-02-09 815-714-4XXX 4000–4999Assigned METROPCS, INC. 5562 JOLIET IL
2004-02-09 815-823-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-02-09 815-823-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-02-09 815-823-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-02-09 815-823-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-02-09 815-975-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-02-09 815-975-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-02-05 815-590-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-02-05 815-590-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-02-05 815-590-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-02-05 815-590-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-01-21 815-651-6XXX 6000–6999Assigned METROPCS, INC. 5562 JOLIET IL
2004-01-21 815-651-7XXX 7000–7999Assigned METROPCS, INC. 5562 JOLIET IL
2004-01-16 815-261-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2004-01-14 815-339-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K GRANVILLE IL
2004-01-14 815-424-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K ELWOOD IL
2004-01-14 815-473-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K WOODLAND IL
2004-01-14 815-496-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K SHERIDAN IL
2004-01-14 815-498-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K SOMONAUK IL
2004-01-14 815-506-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K UNION IL
2004-01-14 815-560-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K HARVARD IL
2004-01-14 815-563-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K CEDARVILLE IL
2004-01-14 815-570-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K SANDWICH IL
2004-01-14 815-572-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K MARENGO IL
2004-01-14 815-584-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K DWIGHT IL
2004-01-14 815-792-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K HARDING IL
2004-01-09 815-608-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2004-01-08 815-261-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 CRYSTAL LK IL
2004-01-08 815-616-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FREEPORT IL
2004-01-05 815-600-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-01-05 815-600-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2004-01-05 815-600-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2003-12-25 815-345-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WOODSTOCK IL
2003-12-25 815-475-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PLATTVILLE IL
2003-12-25 815-534-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FRANKFORT IL
2003-12-25 815-680-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MANHATTAN IL
2003-12-25 815-828-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MINOOKA IL
2003-12-22 815-272-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2003-12-19 815-714-1XXX 1000–1999Assigned METROPCS, INC. 5562 JOLIET IL
2003-12-10 815-404-7XXX 7000–7999Assigned METROPCS, INC. 5562 CRYSTAL LK IL
2003-12-05 815-560-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HARVARD IL
2003-11-20 815-614-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J KANKAKEE IL
2003-11-06 815-566-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2003-11-06 815-566-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE 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.