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 571
METROPCS, INC. 181
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
2023-03-21 571-504-3XXX 3000–3999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2022-12-06 571-504-2XXX 2000–2999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2022-09-07 571-504-0XXX 0000–0999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2022-04-21 571-545-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2022-03-31 571-578-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2022-03-28 571-746-1XXX 1000–1999Assigned METROPCS, INC. 5562 DULLES VA
2021-12-14 571-516-2XXX 2000–2999Assigned METROPCS, INC. 5562 TRIANGLE VA
2021-12-14 571-686-3XXX 3000–3999Assigned METROPCS, INC. 5562 BRADDOCK VA
2021-11-23 571-561-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAYMARKET VA
2021-09-08 571-504-9XXX 9000–9999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2021-09-08 571-646-8XXX 8000–8999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2021-03-30 571-901-7XXX 7000–7999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2020-12-03 571-901-6XXX 6000–6999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2020-11-18 571-901-5XXX 5000–5999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2020-09-30 571-901-4XXX 4000–4999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2020-07-28 571-901-3XXX 3000–3999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2020-01-02 571-461-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2019-10-23 571-559-6XXX 6000–6999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2019-10-07 571-300-6XXX 6000–6999Assigned METROPCS, INC. 5562 DALE CITY VA
2019-09-19 571-415-1XXX 1000–1999Assigned METROPCS, INC. 5562 HAYMARKET VA
2019-09-19 571-695-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2019-08-19 571-404-2XXX 2000–2999Assigned METROPCS, INC. 5562 BRADDOCK VA
2019-08-19 571-413-1XXX 1000–1999Assigned METROPCS, INC. 5562 DULLES VA
2019-08-19 571-466-5XXX 5000–5999Assigned METROPCS, INC. 5562 TRIANGLE VA
2019-07-30 571-440-6XXX 6000–6999Assigned METROPCS, INC. 5562 LEESBURG VA
2019-06-12 571-440-3XXX 3000–3999Assigned METROPCS, INC. 5562 LEESBURG VA
2019-05-24 571-642-9XXX 9000–9999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2019-03-18 571-440-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2018-12-21 571-300-3XXX 3000–3999Assigned METROPCS, INC. 5562 DALE CITY VA
2018-12-07 571-634-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2018-07-09 571-394-9XXX 9000–9999Assigned METROPCS, INC. 5562 TRIANGLE VA
2018-06-22 571-491-2XXX 2000–2999Assigned METROPCS, INC. 5562 DULLES VA
2018-04-05 571-660-3XXX 3000–3999Assigned METROPCS, INC. 5562 TRIANGLE VA
2018-03-21 571-417-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2017-12-29 571-368-1XXX 1000–1999Assigned METROPCS, INC. 5562 DALE CITY VA
2017-11-27 571-300-9XXX 9000–9999Assigned METROPCS, INC. 5562 DALE CITY VA
2017-11-20 571-616-1XXX 1000–1999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2017-09-29 571-320-6XXX 6000–6999Assigned METROPCS, INC. 5562 TRIANGLE VA
2017-09-27 571-491-9XXX 9000–9999Assigned METROPCS, INC. 5562 DULLES VA
2017-09-22 571-831-2XXX 2000–2999Assigned METROPCS, INC. 5562 LEESBURG VA
2017-08-15 571-368-0XXX 0000–0999Assigned METROPCS, INC. 5562 DALE CITY VA
2017-07-13 571-510-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2017-02-21 571-642-7XXX 7000–7999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2017-02-21 571-799-6XXX 6000–6999Assigned METROPCS, INC. 5562 LEESBURG VA
2016-11-30 571-799-5XXX 5000–5999Assigned METROPCS, INC. 5562 LEESBURG VA
2016-11-02 571-320-3XXX 3000–3999Assigned METROPCS, INC. 5562 TRIANGLE VA
2016-11-01 571-252-4XXX 4000–4999Assigned METROPCS, INC. 5562 LEESBURG VA
2016-09-01 571-336-4XXX 4000–4999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2015-12-09 571-365-2XXX 2000–2999Assigned METROPCS, INC. 5562 BRADDOCK VA
2015-12-09 571-707-6XXX 6000–6999Assigned METROPCS, INC. 5562 LEESBURG VA

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.