NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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 510
T-MOBILE USA, INC. 463
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
2024-10-17 510-722-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CROCKETT CA
2024-08-19 510-312-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CROCKETT CA
2024-08-19 510-807-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2024-06-03 510-810-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD ALMD CA
2024-05-31 510-775-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD ALMD CA
2024-05-31 510-894-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2024-04-03 510-306-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD ALMD CA
2024-04-03 510-306-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD ALMD CA
2024-03-27 510-392-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-12-04 510-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CROCKETT CA
2023-12-04 510-312-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CROCKETT CA
2023-09-25 510-365-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2021-08-03 510-836-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-836-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-853-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-869-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-641-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-641-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 510-899-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-899-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-09 510-971-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-03-04 510-916-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-04 510-916-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-01 510-892-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2021-03-01 510-892-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2021-03-01 510-904-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-02-25 510-973-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2020-12-02 510-823-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-12-02 510-992-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-12-02 510-992-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-13 510-899-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-13 510-899-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-09-01 510-588-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-09-01 510-588-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-09-01 510-588-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-08-20 510-729-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2020-08-11 510-216-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2020-08-11 510-216-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2020-08-10 510-662-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-08-07 510-807-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-807-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-807-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 510-977-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2020-08-07 510-977-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2020-08-03 510-929-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-08-03 510-929-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-07-24 510-994-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-07-07 510-630-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.