NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 301
METROPCS, INC. 84
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
2022-10-21 301-550-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2022-09-29 301-378-5XXX 5000–5999Assigned METROPCS, INC. 5562 FREDERICK MD
2020-09-11 301-923-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2019-11-05 301-433-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2019-11-05 301-835-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2019-09-19 301-242-1XXX 1000–1999Assigned METROPCS, INC. 5562 BRANDYWINE MD
2019-08-06 301-624-0XXX 0000–0999Assigned METROPCS, INC. 5562 FREDERICK MD
2019-06-26 301-291-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2019-06-17 301-720-2XXX 2000–2999Assigned METROPCS, INC. 5562 BRANDYWINE MD
2019-05-24 301-809-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2018-12-05 301-859-5XXX 5000–5999Assigned METROPCS, INC. 5562 OAKLAND MD
2018-07-19 301-746-1XXX 1000–1999Assigned METROPCS, INC. 5562 FRIENDSVL MD
2018-05-10 301-723-1XXX 1000–1999Assigned METROPCS, INC. 5562 CUMBERLAND MD
2018-03-23 301-860-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2018-03-15 301-701-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2017-09-20 301-383-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2017-07-11 301-756-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2017-06-20 301-383-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2017-03-01 301-383-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-12-30 301-291-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-12-01 301-860-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-11-01 301-383-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-10-17 301-291-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-09-02 301-383-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2016-02-10 301-665-6XXX 6000–6999Assigned METROPCS, INC. 5562 HAGERSTOWN MD
2015-12-03 301-898-6XXX 6000–6999Assigned METROPCS, INC. 5562 FREDERICK MD
2015-01-12 301-860-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNG236Z14 MD
2014-12-05 301-732-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2014-11-07 301-732-0XXX 0000–0999Assigned METROPCS, INC. 5562 FREDERICK MD
2013-07-02 301-388-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-07-02 301-640-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-07-02 301-679-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-07-02 301-732-2XXX 2000–2999Assigned METROPCS, INC. 5562 FREDERICK MD
2013-07-02 301-825-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-07-02 301-979-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-05-23 301-212-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-05-23 301-541-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2013-05-23 301-541-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2013-05-23 301-679-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNGTNZN12 MD
2013-05-23 301-975-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN10 MD
2013-05-21 301-364-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-364-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-583-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-21 301-732-1XXX 1000–1999Assigned METROPCS, INC. 5562 FREDERICK MD
2011-10-13 301-880-6XXX 6000–6999Assigned METROPCS, INC. 5562 LXTNPKGRML MD
2011-10-05 301-267-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSHNGTNZN3 MD
2011-08-15 301-338-4XXX 4000–4999Assigned METROPCS, INC. 5562 CUMBERLAND MD
2011-08-09 301-408-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSHNGTNZN3 MD
2011-06-27 301-378-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2011-06-27 301-378-4XXX 4000–4999Assigned METROPCS, INC. 5562 FREDERICK MD

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.