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
2010-08-27 253-236-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2010-08-26 253-343-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-08-10 253-432-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2010-08-06 253-271-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2010-06-29 253-750-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2010-06-23 253-200-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PUYALLUP WA
2010-06-23 253-235-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2010-06-23 253-245-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2010-06-23 253-245-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2010-06-23 253-271-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GRAHAM WA
2010-06-23 253-470-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2010-06-18 253-220-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2010-06-11 253-214-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-06-11 253-343-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2010-06-11 253-343-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2010-05-26 253-944-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2010-05-11 253-220-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KENT WA
2010-05-03 253-220-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2010-04-28 253-256-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2010-03-16 253-235-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 TACOMAWVLY WA
2010-03-16 253-235-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 TACOMAWVLY WA
2010-03-12 253-254-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-03-12 253-254-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-03-11 253-397-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2010-03-08 253-358-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2010-02-02 253-214-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2010-01-28 253-432-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 GIG HARBOR WA
2010-01-25 253-254-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2010-01-22 253-235-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2010-01-22 253-237-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-01-22 253-237-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-01-22 253-237-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-01-22 253-254-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2010-01-22 253-254-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2010-01-22 253-778-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2010-01-18 253-432-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2010-01-15 253-358-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2010-01-13 253-254-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-01-13 253-254-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-01-13 253-254-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-01-13 253-254-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2010-01-13 253-432-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2010-01-04 253-266-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2010-01-04 253-293-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2009-12-21 253-561-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2009-12-08 253-753-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2009-12-08 253-753-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2009-11-18 253-220-1XXX 1000–1999Assigned IP HORIZON LLC 515J KENT WA
2009-11-06 253-313-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GIG HARBOR WA
2009-10-13 253-293-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN 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.