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
2012-07-17 253-246-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
2012-07-10 253-878-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2012-07-05 253-888-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2012-06-27 253-397-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2012-06-07 253-545-6XXX 6000–6999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-05-21 253-277-5XXX 5000–5999Assigned RAINIER CONNECT, INC. - WA 7720 KENT WA
2012-05-21 253-358-1XXX 1000–1999Assigned RAINIER CONNECT, INC. - WA 7720 GIG HARBOR WA
2012-05-18 253-888-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
2012-05-15 253-448-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2012-04-30 253-442-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2012-04-30 253-888-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2012-04-27 253-442-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2012-04-25 253-246-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
2012-04-18 253-733-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 DES MOINES WA
2012-04-06 253-303-4XXX 4000–4999Assigned ASTOUND BROADBAND, LLC - WA 937F GIG HARBOR WA
2012-04-02 253-271-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GRAHAM WA
2012-03-27 253-268-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 PUYALLUP WA
2012-03-06 253-878-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2012-03-05 253-888-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2012-02-28 253-878-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2012-02-21 253-237-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2012-02-21 253-252-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMAWVLY WA
2012-02-21 253-256-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PUYALLUP WA
2012-02-21 253-442-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2012-02-01 253-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AUBURN WA
2012-01-18 253-442-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2012-01-12 253-442-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-01-12 253-442-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-01-12 253-442-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-01-11 253-321-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUMNER WA
2012-01-11 253-336-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2012-01-09 253-442-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2012-01-06 253-549-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2012-01-05 253-329-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2012-01-03 253-236-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KENT WA
2012-01-03 253-358-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2012-01-03 253-448-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TACOMA WA
2012-01-03 253-697-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2011-12-22 253-215-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ROY WA
2011-12-21 253-268-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2011-12-02 253-283-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-12-02 253-283-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-12-02 253-283-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-11-14 253-329-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2011-11-14 253-432-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2011-11-04 253-283-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-10-12 253-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-10-12 253-283-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-10-12 253-448-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-10-12 253-448-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.