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
2004-06-10 815-858-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IL 6265 ELIZABETH IL
2004-06-08 815-918-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CLIFTON IL
2004-06-03 815-239-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PECATONICA IL
2004-06-03 815-362-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GERMAN VLY IL
2004-06-03 815-539-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MENDOTA IL
2004-06-03 815-745-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WARREN IL
2004-05-21 815-698-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K ASHKUM IL
2004-05-13 815-826-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SOMONAUK IL
2004-05-11 815-280-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-05-10 815-276-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2004-05-09 815-566-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2004-04-30 815-214-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 KANKAKEE IL
2004-04-30 815-215-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NEW LENOX IL
2004-04-30 815-221-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LOCKPORT IL
2004-04-30 815-308-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 WOODSTOCK IL
2004-04-30 815-313-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 OTTAWA IL
2004-04-30 815-318-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 MORRIS IL
2004-04-30 815-410-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LA SALLE IL
2004-04-30 815-521-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 MINOOKA IL
2004-04-28 815-608-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2004-04-15 815-388-2XXX 2000–2999Assigned METROPCS, INC. 5562 MCHENRY IL
2004-04-15 815-388-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MCHENRY IL
2004-03-25 815-403-8XXX 8000–8999Assigned METROPCS, INC. 5562 MCHENRY IL
2004-03-12 815-267-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 PLAINFIELD IL
2004-03-09 815-272-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-590-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-03-09 815-590-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-03-09 815-590-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-03-09 815-590-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-03-09 815-590-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IL 6265 STERLING IL
2004-03-09 815-600-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-600-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-651-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-651-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-651-5XXX 5000–5999Assigned METROPCS, INC. 5562 JOLIET IL
2004-03-09 815-651-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-999-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-999-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-09 815-999-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-03-07 815-601-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-03-07 815-601-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IL 6265 ROCKFORD IL
2004-02-25 815-272-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2004-02-25 815-644-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CRESCENTCY 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.