NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 — NPA 253
EXIANT COMMUNICATIONS LLC 2
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
2004-11-17 253-426-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-11-05 253-205-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-10-27 253-359-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-10-27 253-359-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-10-14 253-310-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-10-11 253-344-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-10-11 253-344-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-10-11 253-344-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-10-08 253-797-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2004-10-04 253-299-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SUMNER WA
2004-09-23 253-310-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-09-21 253-315-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2004-08-31 253-310-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2004-08-31 253-310-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2004-08-31 253-310-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2004-08-26 253-205-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-08-17 253-203-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-08-13 253-250-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-08-13 253-250-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-08-11 253-299-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SUMNER WA
2004-08-10 253-266-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-08-10 253-310-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-08-03 253-203-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-07-26 253-205-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-07-06 253-203-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-07-06 253-203-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2004-06-16 253-590-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-06-16 253-590-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-06-16 253-843-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ROY WA
2004-06-11 253-299-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SUMNER WA
2004-06-07 253-250-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-06-07 253-250-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-06-07 253-375-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GRAHAM WA
2004-06-07 253-375-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GRAHAM WA
2004-05-28 253-217-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-05-20 253-250-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-05-20 253-250-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2004-05-18 253-592-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-05-18 253-592-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-05-18 253-592-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-05-18 253-592-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-05-05 253-310-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2004-04-30 253-985-2XXX 2000–2999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-4XXX 4000–4999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-8XXX 8000–8999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-29 253-592-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-04-29 253-592-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-04-29 253-592-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-04-29 253-592-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.