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 231
NEW CINGULAR WIRELESS PCS, LLC - IL 2
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
2026-09-14 231-296-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREMONT MI
2026-09-14 231-721-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2026-03-19 231-469-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2026-02-25 231-428-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2025-09-24 231-594-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2025-09-16 231-425-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUDINGTON MI
2025-06-18 231-430-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYNE CITY MI
2025-05-22 231-341-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE ANN MI
2025-04-02 231-279-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIG RAPIDS MI
2025-03-24 231-307-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORLEY MI
2024-11-27 231-376-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWIN LAKE MI
2024-09-05 231-456-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLEN LAKE MI
2024-09-05 231-564-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KALKASKA MI
2024-05-15 231-224-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREMONT MI
2023-09-01 231-428-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2023-09-01 231-563-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2023-05-05 231-594-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2022-08-12 231-397-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISTEE MI
2022-08-12 231-397-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISTEE MI
2022-08-12 231-410-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISTEE MI
2022-08-12 231-550-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-08-12 231-550-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-08-12 231-550-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-08-12 231-550-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-06-22 231-387-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-06-22 231-550-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-06-22 231-550-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2022-06-09 231-397-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISTEE MI
2021-12-15 231-475-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTON MI
2021-10-27 231-387-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-27 231-387-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-10-06 231-387-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2021-05-07 231-852-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUDINGTON MI
2020-11-09 231-254-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2020-11-09 231-254-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2020-11-09 231-254-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2020-11-04 231-281-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2020-11-04 231-281-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2020-09-16 231-577-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CADILLAC MI
2020-04-21 231-459-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYNE CITY MI
2020-04-20 231-742-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2019-12-12 231-900-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-10-10 231-531-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-10-10 231-531-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-09-13 231-939-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI
2019-09-13 231-939-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PETOSKEY MI

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.