NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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, last 30 days
T-MOBILE USA, INC. 68
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
2018-03-07 563-313-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CRESCO IA
2018-03-07 563-313-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CRESCO IA
2018-03-07 563-822-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MANCHESTER IA
2018-03-07 563-822-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MANCHESTER IA
2018-03-06 314-390-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2018-03-06 314-465-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2018-03-06 314-930-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2018-03-06 319-201-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MTPLEASANT IA
2018-03-06 319-201-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MTPLEASANT IA
2018-03-06 319-520-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KEOKUK IA
2018-03-06 319-669-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FT MADISON IA
2018-03-06 319-669-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FT MADISON IA
2018-03-06 515-385-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLARION IA
2018-03-06 515-902-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HUMBOLDT IA
2018-03-06 563-206-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLINTON IA
2018-03-06 563-206-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLINTON IA
2018-03-06 563-239-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2018-03-06 563-239-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2018-03-06 563-261-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MUSCATINE IA
2018-03-06 563-261-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MUSCATINE IA
2018-03-06 641-548-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MASON CITY IA
2018-03-06 641-808-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COLO IA
2018-03-06 641-808-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLO IA
2018-03-06 712-232-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPENCER IA
2018-03-06 712-232-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SPENCER IA
2018-03-06 712-295-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PETERSON IA
2018-03-06 712-338-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MILFORD IA
2018-03-06 712-338-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MILFORD IA
2018-03-06 712-344-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SHELDON IA
2018-03-06 712-344-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SHELDON IA
2018-03-06 712-360-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ORANGECITY IA
2018-03-06 712-759-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SPIRITLAKE IA
2018-03-06 737-213-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2018-03-06 972-703-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TERRELL TX
2018-03-05 309-513-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ALEDO IL
2018-03-05 309-513-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ALEDO IL
2018-03-05 309-714-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GENESEO IL
2018-03-05 309-714-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GENESEO IL
2018-03-05 563-207-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2018-03-05 573-713-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FARMINGTON MO
2018-03-05 636-303-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 UNION MO
2018-03-05 636-622-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TROY MO
2018-03-05 641-481-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-03-05 641-481-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOLEDO IA
2018-03-05 712-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HOSPERS IA
2018-03-05 712-230-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HOSPERS IA
2018-03-05 712-261-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHEROKEE IA
2018-03-05 712-261-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHEROKEE IA
2018-03-05 712-283-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SIOUX RPD IA
2018-03-05 712-298-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EMMETSBURG IA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.