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
2011-10-12 253-448-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-10-05 253-693-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2011-09-12 253-655-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GRAHAM WA
2011-09-08 253-252-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2011-09-08 253-271-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2011-09-07 253-750-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2011-09-02 253-329-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2011-09-02 253-358-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2011-09-01 253-277-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2011-08-31 253-268-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2011-08-31 253-448-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2011-08-11 253-448-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-08-11 253-448-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-08-09 253-283-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-08-09 253-283-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-08-09 253-283-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-08-09 253-283-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-08-02 253-448-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-07-28 253-792-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-07-13 253-792-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-07-13 253-792-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-07-13 253-802-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E AUBURN WA
2011-07-11 253-245-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2011-06-16 253-802-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2011-06-16 253-802-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2011-06-16 253-878-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2011-06-15 253-348-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-06-15 253-348-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-06-15 253-348-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-06-15 253-348-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-06-15 253-348-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2011-06-09 253-348-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2011-06-07 253-234-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2011-06-07 253-234-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2011-06-07 253-242-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2011-06-07 253-242-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2011-06-07 253-245-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2011-06-07 253-256-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PUYALLUP WA
2011-06-07 253-271-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GRAHAM WA
2011-06-07 253-343-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-06-07 253-343-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-06-07 253-470-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2011-06-07 253-802-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2011-05-18 253-802-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2011-05-10 253-248-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
2011-05-10 253-336-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2011-05-09 253-265-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2011-05-09 253-348-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2011-05-06 253-348-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2011-05-06 253-348-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 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.