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 573
T-MOBILE USA, INC. 200
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
2026-01-13 573-451-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ST ROBERT MO
2025-12-03 573-940-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ASHLAND MO
2025-05-05 573-235-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHARLESTON MO
2025-05-05 573-813-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 E PRAIRIE MO
2025-03-17 573-393-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WESTQUINCY MO
2025-03-17 573-451-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ST ROBERT MO
2025-03-17 573-597-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUXVASSE MO
2025-03-17 573-726-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BERNIE MO
2025-03-17 573-827-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DONIPHAN MO
2025-03-17 573-848-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 STEELE MO
2025-03-17 573-993-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLARKSVL MO
2025-02-17 573-557-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELDON MO
2025-02-17 573-674-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LICKING MO
2025-02-17 573-960-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CANTON MO
2025-02-10 573-981-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CAMDENTON MO
2023-02-27 573-650-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 POTOSI MO
2023-02-27 573-650-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 POTOSI MO
2023-02-27 573-650-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 POTOSI MO
2022-12-15 573-902-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRYVILLE MO
2022-12-15 573-902-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRYVILLE MO
2022-09-24 573-540-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2022-09-24 573-540-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2022-09-24 573-801-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2022-09-24 573-801-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2022-09-24 573-801-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2022-07-22 573-609-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 POPLAR BLF MO
2022-07-22 573-609-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 POPLAR BLF MO
2022-06-09 573-797-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2022-06-09 573-797-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2022-06-09 573-797-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2022-04-29 573-816-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SIKESTON MO
2022-04-26 573-952-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FLAT RIVER MO
2022-01-28 573-969-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CENTRALIA MO
2022-01-28 573-982-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CENTRALIA MO
2022-01-13 573-926-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOUISIANA MO
2021-12-13 573-537-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-12-13 573-537-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROLLA MO
2021-11-05 573-780-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 STEGNVIEVE MO
2021-11-01 573-801-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2021-11-01 573-801-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2021-11-01 573-801-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2021-11-01 573-801-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLUMBIA MO
2021-10-14 573-936-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MEXICO MO
2021-10-14 573-936-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MEXICO MO
2021-09-13 573-462-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2021-09-13 573-462-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 JEFFERSNCY MO
2021-09-08 573-805-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEW MADRID MO

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.