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
2016-06-09 480-417-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-06-09 520-244-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-06-09 520-244-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-06-09 520-244-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-06-09 520-585-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-06-09 520-585-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-06-09 702-934-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-09 702-934-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-06-08 206-565-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2016-06-08 206-565-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2016-06-08 903-336-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TEXARKANA TX
2016-06-07 425-215-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-06-07 425-215-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-06-07 650-686-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MILLBRAE CA
2016-06-07 650-770-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-06-07 650-770-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-06-07 650-770-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-06-07 650-770-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-06-07 669-377-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2016-06-07 669-377-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MORGANHILL CA
2016-06-07 707-366-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRFLD-SUIS CA
2016-06-07 831-313-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HOLLISTER CA
2016-06-07 925-967-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DUBLN-SNRM CA
2016-06-07 949-750-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TRABUCO CA
2016-06-07 951-429-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2016-05-26 440-904-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 E CLARIDON OH
2016-05-26 937-991-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-26 937-991-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-26 937-991-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-26 937-991-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-26 937-991-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-26 937-991-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-24 206-483-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2016-05-24 209-280-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LODI CA
2016-05-24 316-925-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WICHITA KS
2016-05-24 567-309-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MANSFIELD OH
2016-05-24 661-365-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-05-24 661-365-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-05-24 661-365-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-05-24 909-601-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2016-05-24 909-601-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2016-05-23 217-775-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-05-23 501-575-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2016-05-23 501-575-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BENTON AR

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.