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
2014-08-20 815-593-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2014-08-20 815-593-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2014-08-20 815-593-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2014-08-20 815-593-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DE KALB IL
2014-08-20 815-769-1XXX 1000–1999Assigned ONVOY, LLC 224C SENECA IL
2014-08-14 815-422-3XXX 3000–3999Assigned ONVOY, LLC 224C ST ANNE IL
2014-08-14 815-687-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2014-08-14 815-687-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 WOODSTOCK IL
2014-08-14 815-792-9XXX 9000–9999Assigned ONVOY, LLC 224C HARDING IL
2014-08-14 815-916-6XXX 6000–6999Assigned ONVOY, LLC 224C PLATTVILLE IL
2014-08-13 815-707-3XXX 3000–3999Assigned ONVOY, LLC 224C GILMAN IL
2014-08-13 815-743-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRAYMONT IL
2014-08-13 815-796-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FLANAGAN IL
2014-07-17 815-446-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CEDARPOINT IL
2014-07-16 815-253-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KEMPTON IL
2014-07-16 815-336-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLETA IL
2014-07-16 815-438-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TAMPICO IL
2014-07-16 815-542-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J THOMAS IL
2014-07-16 815-946-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POLO IL
2014-07-16 815-948-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOOPPOLE IL
2014-07-10 815-365-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REDDICK IL
2014-07-10 815-452-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TOLUCA IL
2014-07-10 815-686-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PIPER CITY IL
2014-07-10 815-688-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STRAWN IL
2014-07-10 815-702-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SAUNEMIN IL
2014-07-10 815-853-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WENONA IL
2014-07-10 815-867-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PONTIAC IL
2014-07-08 815-283-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERMAN IL
2014-07-08 815-368-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOSTANT IL
2014-07-08 815-396-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STEWARD IL
2014-07-08 815-567-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CAMPUS IL
2014-07-08 815-595-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OREGON IL
2014-07-08 815-635-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHATSWORTH IL
2014-07-08 815-647-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CULLOM IL
2014-07-08 815-692-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIRBURY IL
2014-07-08 815-824-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHABBONA IL
2014-07-08 815-854-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LONG POINT IL
2014-07-08 815-869-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MAGNOLIA IL
2014-07-08 815-934-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EMINGTON IL
2014-07-08 815-945-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHENOA IL
2014-07-08 815-949-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CABERY IL
2014-07-08 815-989-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROPHETSTN IL
2014-07-08 815-998-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ODELL IL
2014-07-07 815-208-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FULTON IL
2014-07-07 815-286-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HINCKLEY IL
2014-07-07 815-359-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARMON IL
2014-07-07 815-384-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRESTON IL
2014-07-07 815-393-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONROE CTR IL
2014-07-07 815-400-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORRISON IL
2014-07-07 815-453-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ASHTON 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.