NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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
2014-09-18 425-499-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-499-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-499-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-835-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2014-09-18 442-245-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VISTA CA
2014-09-18 510-953-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2014-09-18 510-953-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2014-09-18 530-492-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2014-09-18 559-644-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CARUTHERS CA
2014-09-18 562-393-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LA HABRA CA
2014-09-18 657-226-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2014-09-18 661-436-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2014-09-18 747-229-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2014-09-18 747-229-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2014-09-18 747-229-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2014-09-18 747-229-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2014-09-18 747-322-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2014-09-18 831-975-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALINAS CA
2014-09-18 909-536-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-09-18 916-582-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-09-18 916-582-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-09-18 925-448-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WALNUT CRK CA
2014-09-18 951-432-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONA CA
2014-09-17 209-737-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOS BANOS CA
2014-09-17 253-213-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-09-17 253-213-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-09-17 360-932-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2014-09-17 360-932-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2014-09-17 442-226-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2014-09-17 442-234-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2014-09-17 442-236-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2014-09-17 442-237-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2014-09-17 559-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-09-17 559-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2014-09-17 619-538-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-09-17 619-538-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-09-17 619-538-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-09-17 619-538-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-09-17 619-538-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-09-17 669-237-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-09-17 669-237-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2014-09-17 669-245-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2014-09-17 669-245-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2014-09-17 702-613-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2014-09-17 775-419-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PAHRUMP NV
2014-09-17 775-419-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PAHRUMP NV
2014-09-17 775-419-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PAHRUMP NV
2014-09-17 909-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2014-09-17 909-572-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLTON CA
2014-09-17 909-990-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RIALTO CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.