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
2011-07-21 815-250-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-07-21 815-579-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-07-19 815-200-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LA SALLE IL
2011-07-18 815-321-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2011-07-11 815-909-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2011-07-11 815-909-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2011-07-11 815-909-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2011-07-07 815-255-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2011-07-07 815-507-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MOMENCE IL
2011-07-07 815-507-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MOMENCE IL
2011-07-07 815-513-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MORRIS IL
2011-07-06 815-213-3XXX 3000–3999Assigned METROPCS, INC. 5562 STERLING IL
2011-07-01 815-278-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-01 815-278-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-06-27 815-517-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2011-05-23 815-348-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E KANKAKEE IL
2011-05-23 815-407-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LOCKPORT IL
2011-05-23 815-681-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2011-05-19 815-324-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OTTAWA IL
2011-05-19 815-390-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BRAIDWOOD IL
2011-05-19 815-408-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E UTICA IL
2011-05-19 815-410-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LA SALLE IL
2011-05-19 815-414-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E EARLVILLE IL
2011-05-19 815-448-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C MAZON IL
2011-05-19 815-527-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E WOODSTOCK IL
2011-05-19 815-782-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PLAINFIELD IL
2011-05-19 815-782-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PLAINFIELD IL
2011-05-19 815-887-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HARVARD IL
2011-05-19 815-900-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MCHENRY IL
2011-05-11 815-200-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LA SALLE IL
2011-05-11 815-683-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CRESCENTCY IL
2011-05-06 815-200-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LA SALLE IL
2011-05-06 815-320-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E NEW LENOX IL
2011-05-06 815-681-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2011-04-20 815-373-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ELWOOD IL
2011-04-11 815-681-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2011-04-08 815-900-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2011-04-07 815-944-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOMENCE IL
2011-04-04 815-503-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MENDOTA IL
2011-04-01 815-278-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-04-01 815-278-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-03-31 815-271-0XXX 0000–0999Assigned METROPCS, INC. 5562 MCHENRY IL
2011-03-31 815-307-9XXX 9000–9999Assigned METROPCS, INC. 5562 MCHENRY IL
2011-03-28 815-719-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRINCETON IL
2011-03-25 815-493-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - IL 259E LANARK IL
2011-03-25 815-493-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - IL 259E LANARK IL
2011-03-25 815-510-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - IL 259E STREATOR IL
2011-03-25 815-510-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - IL 259E STREATOR IL
2011-03-25 815-692-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - IL 259E FAIRBURY IL
2011-03-25 815-867-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - IL 259E PONTIAC 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.