NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 901
METROPCS, INC. 189
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
2023-05-26 901-520-4XXX 4000–4999Assigned METROPCS, INC. 5562 MILLINGTON TN
2022-12-02 901-520-8XXX 8000–8999Assigned METROPCS, INC. 5562 MILLINGTON TN
2022-12-02 901-520-9XXX 9000–9999Assigned METROPCS, INC. 5562 MILLINGTON TN
2022-12-02 901-694-3XXX 3000–3999Assigned METROPCS, INC. 5562 SOMERVILLE TN
2022-12-02 901-742-7XXX 7000–7999Assigned METROPCS, INC. 5562 ARLINGTON TN
2022-04-13 901-407-9XXX 9000–9999Assigned METROPCS, INC. 5562 MILLINGTON TN
2022-03-28 901-407-5XXX 5000–5999Assigned METROPCS, INC. 5562 MILLINGTON TN
2022-03-02 901-520-7XXX 7000–7999Assigned METROPCS, INC. 5562 MILLINGTON TN
2021-12-13 901-520-3XXX 3000–3999Assigned METROPCS, INC. 5562 MILLINGTON TN
2021-12-13 901-613-7XXX 7000–7999Assigned METROPCS, INC. 5562 ARLINGTON TN
2021-10-05 901-407-8XXX 8000–8999Assigned METROPCS, INC. 5562 MILLINGTON TN
2021-10-05 901-613-2XXX 2000–2999Assigned METROPCS, INC. 5562 ARLINGTON TN
2021-08-31 901-593-4XXX 4000–4999Assigned METROPCS, INC. 5562 SOMERVILLE TN
2021-03-19 901-557-2XXX 2000–2999Assigned METROPCS, INC. 5562 ARLINGTON TN
2021-01-14 901-407-4XXX 4000–4999Assigned METROPCS, INC. 5562 MILLINGTON TN
2021-01-14 901-587-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2021-01-14 901-587-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-12-31 901-499-0XXX 0000–0999Assigned METROPCS, INC. 5562 ARLINGTON TN
2020-12-11 901-582-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-12-03 901-582-1XXX 1000–1999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-09-01 901-407-3XXX 3000–3999Assigned METROPCS, INC. 5562 MILLINGTON TN
2020-06-15 901-821-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-03-04 901-320-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-03-04 901-370-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-01-02 901-403-4XXX 4000–4999Assigned METROPCS, INC. 5562 ARLINGTON TN
2020-01-02 901-479-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2020-01-02 901-479-8XXX 8000–8999Assigned METROPCS, INC. 5562 MEMPHIS TN
2019-07-03 901-403-9XXX 9000–9999Assigned METROPCS, INC. 5562 ARLINGTON TN
2019-06-28 901-407-1XXX 1000–1999Assigned METROPCS, INC. 5562 MILLINGTON TN
2019-03-08 901-545-1XXX 1000–1999Assigned METROPCS, INC. 5562 MEMPHIS TN
2019-03-08 901-765-7XXX 7000–7999Assigned METROPCS, INC. 5562 MEMPHIS TN
2019-01-14 901-341-8XXX 8000–8999Assigned METROPCS, INC. 5562 MEMPHIS TN
2019-01-14 901-390-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2018-12-18 901-436-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2018-01-16 901-437-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-12-20 901-247-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-12-20 901-350-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-09-21 901-501-2XXX 2000–2999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-09-21 901-501-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-09-21 901-501-4XXX 4000–4999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-03-06 901-247-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-03-06 901-247-1XXX 1000–1999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-03-06 901-247-3XXX 3000–3999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-03-06 901-247-9XXX 9000–9999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-01-03 901-666-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-01-03 901-707-9XXX 9000–9999Assigned METROPCS, INC. 5562 MEMPHIS TN
2017-01-03 901-708-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN
2016-12-05 901-708-9XXX 9000–9999Assigned METROPCS, INC. 5562 MEMPHIS TN
2016-11-29 901-671-9XXX 9000–9999Assigned METROPCS, INC. 5562 MEMPHIS TN
2016-11-29 901-707-0XXX 0000–0999Assigned METROPCS, INC. 5562 MEMPHIS TN

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.