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
2010-03-11 815-348-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K KANKAKEE IL
2010-03-08 815-283-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WATERMAN IL
2010-03-08 815-860-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ELWOOD IL
2010-03-05 815-314-8XXX 8000–8999Assigned ONVOY, LLC 224C MANHATTAN IL
2010-03-03 815-286-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HINCKLEY IL
2010-03-03 815-393-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MONROE CTR IL
2010-03-03 815-493-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LANARK IL
2010-03-03 815-522-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F KIRKLAND IL
2010-03-03 815-824-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHABBONA IL
2010-03-03 815-825-3XXX 3000–3999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MALTA IL
2010-03-03 815-827-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MAPLE PARK IL
2010-03-03 815-864-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHANNON IL
2010-03-03 815-906-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MT CARROLL IL
2010-02-23 815-944-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOMENCE IL
2010-02-22 815-322-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2010-02-22 815-668-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKFORD IL
2010-02-12 815-617-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J OTTAWA IL
2010-02-11 815-412-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FRANKFORT IL
2010-02-11 815-575-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E WOODSTOCK IL
2010-02-10 815-200-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LA SALLE IL
2010-02-10 815-277-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E FRANKFORT IL
2010-02-10 815-322-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MCHENRY IL
2010-02-10 815-414-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E EARLVILLE IL
2010-02-10 815-596-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MARENGO IL
2010-02-10 815-683-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CRESCENTCY IL
2010-02-04 815-647-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CULLOM IL
2010-02-04 815-702-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SAUNEMIN IL
2010-02-04 815-920-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CORNELL IL
2010-02-03 815-408-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E UTICA IL
2010-02-02 815-348-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANKAKEE IL
2010-01-28 815-312-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2010-01-28 815-312-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ROCKFORD IL
2010-01-28 815-994-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DIXON IL
2010-01-26 815-575-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WOODSTOCK IL
2010-01-25 815-617-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OTTAWA IL
2010-01-21 815-221-8XXX 8000–8999Assigned ONVOY, LLC 224C LOCKPORT IL
2010-01-21 815-250-1XXX 1000–1999Assigned ONVOY, LLC 224C LA SALLE IL
2010-01-21 815-305-1XXX 1000–1999Assigned ONVOY, LLC 224C GARDNER IL
2010-01-21 815-305-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K GARDNER IL
2010-01-21 815-320-0XXX 0000–0999Assigned ONVOY, LLC 224C NEW LENOX IL
2010-01-21 815-365-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F REDDICK IL
2010-01-21 815-390-1XXX 1000–1999Assigned ONVOY, LLC 224C BRAIDWOOD IL
2010-01-21 815-390-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K BRAIDWOOD IL
2010-01-21 815-419-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F PONTIAC IL
2010-01-21 815-432-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K WATSEKA IL
2010-01-21 815-450-6XXX 6000–6999Assigned MCC TELEPHONY LLC 593K MOMENCE IL
2010-01-21 815-452-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TOLUCA IL
2010-01-21 815-466-4XXX 4000–4999Assigned MCC TELEPHONY LLC 593K GRANT PARK IL
2010-01-21 815-584-5XXX 5000–5999Assigned MCC TELEPHONY LLC 593K DWIGHT IL
2010-01-21 815-635-5XXX 5000–5999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHATSWORTH 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.