NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026

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
2018-12-03 425-410-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-410-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-535-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2018-12-03 442-279-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-12-03 442-279-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-12-03 442-484-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-12-03 442-484-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-12-03 626-479-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINA CA
2018-12-03 661-234-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-12-03 661-409-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-12-03 747-333-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2018-12-03 747-333-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2018-12-03 760-697-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2018-12-03 858-252-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2018-12-03 909-470-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-12-03 909-470-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-12-03 951-512-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2018-12-03 951-512-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2018-11-30 702-849-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2018-11-30 702-849-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2018-11-26 209-519-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOS BANOS CA
2018-11-26 385-280-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2018-11-26 385-280-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2018-11-26 424-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2018-11-26 562-503-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NORWALK CA
2018-11-26 562-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NORWALK CA
2018-11-26 619-627-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2018-11-26 805-424-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SIMIVALLEY CA
2018-11-26 925-434-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2018-11-26 925-436-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2018-11-26 951-460-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2018-11-26 951-518-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2018-11-21 970-844-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DURANGO CO
2018-11-16 650-439-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2018-11-16 707-714-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 UKIAH CA
2018-11-16 805-608-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANTAMARIA CA
2018-11-16 805-608-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SANTAMARIA CA
2018-11-14 425-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2018-11-12 720-828-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2018-11-12 720-828-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2018-11-09 206-887-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2018-11-09 206-887-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2018-11-09 323-797-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2018-11-09 323-827-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2018-11-09 424-419-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2018-11-09 424-425-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MALIBU CA
2018-11-09 510-804-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-11-07 406-304-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MISSOULA MT
2018-11-06 682-847-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLEBURNE TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.