NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 331
ONVOY, LLC 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 3
NEW CINGULAR WIRELESS PCS, LLC - IL 1
BANDWIDTH.COM CLEC, LLC - 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
2023-06-23 331-294-6XXX 6000–6999Assigned ONVOY, LLC 224C NAPERVILLE IL
2023-06-23 331-313-8XXX 8000–8999Assigned ONVOY, LLC 224C NAPERVILLE IL
2023-06-23 331-313-9XXX 9000–9999Assigned ONVOY, LLC 224C NAPERVILLE IL
2023-06-23 331-334-9XXX 9000–9999Assigned ONVOY, LLC 224C BATAVIA IL
2023-06-23 331-837-8XXX 8000–8999Assigned ONVOY, LLC 224C W CHICAGO IL
2023-06-20 331-224-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E ITASCA IL
2023-06-20 331-627-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOMBARD IL
2023-06-05 331-224-2XXX 2000–2999Assigned ONVOY, LLC 224C ITASCA IL
2023-06-05 331-291-4XXX 4000–4999Assigned ONVOY, LLC 224C DOWNERSGRV IL
2023-06-05 331-291-7XXX 7000–7999Assigned ONVOY, LLC 224C DOWNERSGRV IL
2023-06-05 331-291-8XXX 8000–8999Assigned ONVOY, LLC 224C DOWNERSGRV IL
2023-06-05 331-293-5XXX 5000–5999Assigned ONVOY, LLC 224C AURORA IL
2023-06-05 331-294-7XXX 7000–7999Assigned ONVOY, LLC 224C NAPERVILLE IL
2023-06-05 331-388-3XXX 3000–3999Assigned ONVOY, LLC 224C SUGARGROVE IL
2023-06-05 331-466-7XXX 7000–7999Assigned ONVOY, LLC 224C GLEN ELLYN IL
2023-06-05 331-946-1XXX 1000–1999Assigned ONVOY, LLC 224C GLEN ELLYN IL
2023-06-01 331-291-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-06-01 331-343-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-06-01 331-343-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-06-01 331-343-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-06-01 331-343-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-06-01 331-343-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DOWNERSGRV IL
2023-05-25 331-289-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E HINSDALE IL
2023-05-25 331-289-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E HINSDALE IL
2023-05-16 331-293-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-05-16 331-293-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-05-16 331-293-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-05-08 331-286-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ST CHARLES IL
2023-05-08 331-286-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ST CHARLES IL
2023-05-05 331-232-2XXX 2000–2999Assigned ONVOY, LLC 224C W CHICAGO IL
2023-05-01 331-867-4XXX 4000–4999Assigned TELNYX LLC 073H YORKVILLE IL
2023-04-28 331-627-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOMBARD IL
2023-04-28 331-627-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOMBARD IL
2023-04-25 331-284-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BARTLETT IL
2023-04-25 331-293-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J AURORA IL
2023-04-21 331-296-2XXX 2000–2999Assigned ONVOY, LLC 224C WHEATON IL
2023-04-19 331-294-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NAPERVILLE IL
2023-04-18 331-296-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WHEATON IL
2023-04-17 331-343-2XXX 2000–2999Assigned ONVOY, LLC 224C DOWNERSGRV IL
2023-04-17 331-867-3XXX 3000–3999Assigned ONVOY, LLC 224C YORKVILLE IL
2023-04-14 331-252-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WARRENVL IL
2023-03-22 331-800-2XXX 2000–2999Assigned ONVOY, LLC 224C W CHICAGO IL
2023-02-22 331-334-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BATAVIA IL
2023-02-15 331-343-0XXX 0000–0999Assigned TELNYX LLC 073H DOWNERSGRV IL
2023-02-07 331-293-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-02-07 331-293-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-02-07 331-293-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AURORA IL
2023-02-07 331-295-1XXX 1000–1999Assigned NUSO, LLC 732J AURORA IL
2023-02-06 331-294-8XXX 8000–8999Assigned ONVOY, LLC 224C NAPERVILLE IL
2023-02-03 331-267-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOMBARD IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.