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
2011-12-13 815-421-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E HERSCHER IL
2011-12-13 815-446-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CEDARPOINT IL
2011-12-12 815-510-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 STREATOR IL
2011-12-12 815-695-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E NEWARK IL
2011-12-12 815-719-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 PRINCETON IL
2011-11-28 815-429-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E SHELDON IL
2011-11-28 815-697-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHEBANSE IL
2011-11-08 815-552-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LOCKPORT IL
2011-11-03 815-250-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-11-03 815-250-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-10-27 815-373-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E ELWOOD IL
2011-10-27 815-785-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E WATSEKA IL
2011-10-19 815-687-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E WOODSTOCK IL
2011-10-18 815-268-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C ONARGA IL
2011-10-18 815-320-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C NEW LENOX IL
2011-10-18 815-374-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DWIGHT IL
2011-10-18 815-426-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HERSCHER IL
2011-10-18 815-427-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C ST ANNE IL
2011-10-18 815-506-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C UNION IL
2011-10-18 815-507-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MOMENCE IL
2011-10-18 815-681-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C OGLESBY IL
2011-10-18 815-707-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GILMAN IL
2011-10-18 815-709-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COAL CITY IL
2011-10-18 815-710-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MORRIS IL
2011-10-18 815-769-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C SENECA IL
2011-10-18 815-785-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C WATSEKA IL
2011-10-10 815-319-8XXX 8000–8999Assigned METROPCS, INC. 5562 ROCKFORD IL
2011-10-10 815-319-9XXX 9000–9999Assigned METROPCS, INC. 5562 ROCKFORD IL
2011-10-10 815-558-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-10-10 815-558-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-10-10 815-558-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-09-30 815-785-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WATSEKA IL
2011-09-28 815-900-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2011-09-15 815-324-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E OTTAWA IL
2011-08-17 815-764-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DE KALB IL
2011-08-11 815-826-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SOMONAUK IL
2011-08-08 815-656-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FREEPORT IL
2011-08-02 815-414-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E EARLVILLE IL
2011-08-02 815-524-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E LOCKPORT IL
2011-07-25 815-278-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-386-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-386-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-386-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-25 815-768-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 JOLIET IL
2011-07-25 815-900-4XXX 4000–4999Assigned METROPCS, INC. 5562 MCHENRY IL
2011-07-25 815-999-1XXX 1000–1999Assigned METROPCS, INC. 5562 JOLIET IL
2011-07-21 815-200-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-07-21 815-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-07-21 815-250-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LA SALLE IL
2011-07-21 815-250-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA SALLE 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.