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
2005-05-10 815-997-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2005-05-09 815-271-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MCHENRY IL
2005-05-09 815-401-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2005-05-03 815-475-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PLATTVILLE IL
2005-05-03 815-680-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MANHATTAN IL
2005-04-25 815-992-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 STREATOR IL
2005-04-19 815-531-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 JOLIET IL
2005-04-19 815-847-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C ROCKFORD IL
2005-04-18 815-313-5XXX 5000–5999Assigned MCC TELEPHONY LLC 593K OTTAWA IL
2005-04-18 815-388-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MCHENRY IL
2005-04-18 815-675-5XXX 5000–5999Assigned MCC TELEPHONY LLC 593K SPRING GRV IL
2005-04-18 815-765-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F POPLAR GRV IL
2005-04-18 815-828-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MINOOKA IL
2005-04-12 815-410-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 LA SALLE IL
2005-04-06 815-940-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GARDNER IL
2005-04-06 815-940-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GARDNER IL
2005-04-04 815-345-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WOODSTOCK IL
2005-03-31 815-306-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LOCKPORT IL
2005-03-23 815-573-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2005-03-23 815-573-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2005-03-22 815-677-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DIXON IL
2005-03-21 815-570-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SANDWICH IL
2005-03-21 815-981-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2005-03-21 815-981-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DE KALB IL
2005-03-17 815-593-0XXX 0000–0999Assigned METROPCS, INC. 5562 DE KALB IL
2005-03-04 815-893-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CRYSTAL LK IL
2005-03-04 815-893-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CRYSTAL LK IL
2005-03-02 815-585-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MORRIS IL
2005-03-02 815-733-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PLAINFIELD IL
2005-02-24 815-323-1XXX 1000–1999Assigned FRONTIER NORTH, INC. - IL 1015 BELVIDERE IL
2005-02-24 815-957-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ROCKTON IL
2005-02-23 815-215-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E NEW LENOX IL
2005-02-23 815-404-0XXX 0000–0999Assigned METROPCS, INC. 5562 CRYSTAL LK IL
2005-02-22 815-221-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K LOCKPORT IL
2005-02-22 815-277-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K FRANKFORT IL
2005-02-22 815-317-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K CRESCENTCY IL
2005-02-22 815-318-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K MORRIS IL
2005-02-22 815-322-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K MCHENRY IL
2005-02-22 815-410-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K LA SALLE IL
2005-02-22 815-531-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K JOLIET IL
2005-02-22 815-556-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K PLAINFIELD IL
2005-02-22 815-587-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K OTTAWA IL
2005-02-22 815-828-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K MINOOKA IL
2005-02-17 815-295-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2005-02-17 815-295-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2005-02-17 815-669-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MCHENRY IL
2005-02-17 815-676-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PLAINFIELD IL
2005-02-17 815-676-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PLAINFIELD IL
2005-02-17 815-901-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DE KALB IL
2005-02-16 815-207-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 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.