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
2011-08-04 513-399-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-08-04 541-217-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COOS BAY OR
2011-08-04 541-238-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2011-08-04 541-829-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2011-08-03 330-271-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LISBON OH
2011-08-03 425-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-03 425-312-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-03 425-354-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2011-08-03 918-815-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2011-08-03 920-636-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2011-08-03 937-853-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2011-08-03 937-853-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DAYTON OH
2011-08-02 208-404-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TWIN FALLS ID
2011-08-02 208-901-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2011-08-02 219-413-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 E CHICAGO IN
2011-08-02 414-399-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-08-02 414-399-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-08-02 414-639-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-08-01 210-848-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2011-08-01 210-937-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2011-08-01 779-220-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CRYSTAL LK IL
2011-08-01 870-203-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2011-08-01 870-277-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2011-08-01 870-277-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2011-08-01 870-277-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2011-08-01 870-277-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 JONESBORO AR
2011-08-01 870-281-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2011-08-01 870-281-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BLYTHEVL AR
2011-07-29 216-566-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-29 216-575-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-29 216-575-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-29 216-583-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-29 216-622-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2011-07-29 440-222-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LORAIN OH
2011-07-29 440-222-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LORAIN OH
2011-07-29 440-222-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LORAIN OH
2011-07-29 501-272-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-07-29 501-272-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-07-29 501-272-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-07-29 501-272-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-07-29 708-545-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-29 708-545-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA GRANGE IL

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.