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
2007-10-19 253-292-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMA WA
2007-10-19 253-341-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-08 253-326-9XXX 9000–9999Assigned METROPCS, INC. 5562 AUBURN WA
2007-10-05 253-324-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-05 253-324-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-10-02 253-929-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2007-09-26 253-320-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2007-09-20 253-249-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-09-18 253-320-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-09-17 253-477-0XXX 0000–0999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-1XXX 1000–1999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-2XXX 2000–2999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-3XXX 3000–3999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-4XXX 4000–4999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-5XXX 5000–5999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-7XXX 7000–7999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-8XXX 8000–8999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-9XXX 9000–9999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-11 253-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PUYALLUP WA
2007-09-06 253-561-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-09-06 253-561-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-09-06 253-737-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-09-04 253-341-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-09-04 253-341-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-09-04 253-341-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-08-29 253-320-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-08-29 253-320-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-08-28 253-929-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-08-27 253-561-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-08-27 253-561-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-08-27 253-561-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-08-10 253-282-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-08-10 253-320-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-07-16 253-282-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-07-16 253-282-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-07-16 253-282-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-07-16 253-886-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-06-14 253-269-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-05-30 253-216-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E KENT WA
2007-05-30 253-719-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2007-05-18 253-267-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2007-05-03 253-282-4XXX 4000–4999Assigned 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.