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
2013-10-02 815-345-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2013-10-02 815-510-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 STREATOR IL
2013-10-02 815-593-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-10-02 815-593-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-10-02 815-593-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-10-02 815-909-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-10-01 815-570-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E SANDWICH IL
2013-09-16 815-268-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E ONARGA IL
2013-09-16 815-287-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E VERONA IL
2013-09-16 815-373-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E ELWOOD IL
2013-09-16 815-707-2XXX 2000–2999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E GILMAN IL
2013-09-16 815-792-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E HARDING IL
2013-08-27 815-994-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DIXON IL
2013-08-13 815-334-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2013-08-13 815-649-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E GARDNER IL
2013-08-05 815-345-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOODSTOCK IL
2013-08-05 815-616-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FREEPORT IL
2013-07-29 815-348-8XXX 8000–8999Assigned IP HORIZON LLC 515J KANKAKEE IL
2013-07-23 815-984-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E WELLINGTON IL
2013-06-21 815-669-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E MCHENRY IL
2013-06-21 815-782-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PLAINFIELD IL
2013-06-13 815-867-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 PONTIAC IL
2013-06-11 815-718-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 STERLING IL
2013-06-05 815-322-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MCHENRY IL
2013-06-04 815-348-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KANKAKEE IL
2013-06-04 815-552-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOCKPORT IL
2013-06-04 815-661-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORRIS IL
2013-06-04 815-733-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLAINFIELD IL
2013-05-29 815-570-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SANDWICH IL
2013-05-29 815-627-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PAW PAW IL
2013-05-21 815-995-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-05-21 815-995-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-05-15 815-916-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E PLATTVILLE IL
2013-05-14 815-867-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 PONTIAC IL
2013-05-02 815-307-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCHENRY IL
2013-04-29 815-255-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MINOOKA IL
2013-04-29 815-915-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRINCETON IL
2013-04-22 815-650-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FREEPORT IL
2013-04-12 815-995-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-04-12 815-995-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2013-04-09 815-660-1XXX 1000–1999Assigned IP HORIZON LLC 515J LOCKPORT IL
2013-04-09 815-687-1XXX 1000–1999Assigned IP HORIZON LLC 515J WOODSTOCK IL
2013-04-05 815-736-2XXX 2000–2999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E LISBON IL
2013-04-05 815-736-7XXX 7000–7999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E LISBON IL
2013-04-04 815-323-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BELVIDERE IL
2013-04-04 815-390-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E BRAIDWOOD IL
2013-04-04 815-415-0XXX 0000–0999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E SENECA IL
2013-04-04 815-415-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E SENECA IL
2013-04-04 815-458-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E BRAIDWOOD IL
2013-04-04 815-466-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E GRANT PARK 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.