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
2005-10-05 253-534-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-10-03 253-200-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2005-10-03 253-200-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2005-10-03 253-249-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-10-03 253-426-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-09-27 253-299-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUMNER WA
2005-09-27 253-299-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUMNER WA
2005-09-22 253-508-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2005-09-22 253-508-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2005-09-20 253-830-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-09-15 253-303-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-09-15 253-315-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2005-09-15 253-315-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2005-09-15 253-315-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2005-09-15 253-486-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2005-09-15 253-683-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-09-12 253-617-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-09-07 253-212-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-09-07 253-267-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-09-07 253-680-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-09-06 253-266-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-08-29 253-200-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 PUYALLUP WA
2005-08-26 253-249-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-08-24 253-761-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-08-10 253-215-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ROY WA
2005-08-05 253-303-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-08-04 253-249-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-08-04 253-267-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-07-13 253-249-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-07-13 253-583-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-07-13 253-583-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-07-11 253-514-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-07-11 253-548-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-07-11 253-548-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-07-11 253-548-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-07-11 253-548-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-07-11 253-579-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-07-11 253-579-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-06-28 253-212-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-28 253-212-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-28 253-495-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-28 253-495-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-28 253-495-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-28 253-495-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-06-21 253-590-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2005-06-21 253-590-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2005-06-21 253-882-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2005-06-21 253-883-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY WA
2005-06-21 253-883-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY WA
2005-06-21 253-883-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY 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.