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
2014-08-15 253-259-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-08-15 253-344-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-15 253-344-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-15 253-344-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-15 253-719-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-15 253-719-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-15 253-878-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-08-11 253-780-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2014-07-17 253-391-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-07-17 253-391-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-07-17 253-649-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2014-07-15 253-313-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-07-15 253-313-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-07-15 253-313-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-06-30 253-277-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2014-06-30 253-328-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E TACOMA WA
2014-06-30 253-754-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2014-06-26 253-259-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E AUBURN WA
2014-06-26 253-754-4XXX 4000–4999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-06-26 253-754-5XXX 5000–5999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-06-20 253-252-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2014-06-13 253-256-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2014-05-27 253-259-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E AUBURN WA
2014-05-22 253-252-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2014-05-22 253-391-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-05-22 253-391-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-05-22 253-391-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-05-20 253-328-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2014-05-20 253-328-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2014-05-20 253-328-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2014-05-13 253-878-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-05-13 253-878-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2014-05-05 253-432-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2014-04-24 253-259-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-04-22 253-244-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2014-04-18 253-754-3XXX 3000–3999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-03-18 253-259-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-03-18 253-893-9XXX 9000–9999Assigned METROPCS, INC. 5562 KENT WA
2014-03-18 253-954-5XXX 5000–5999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-03-11 253-215-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROY WA
2014-02-28 253-213-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-28 253-213-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-28 253-213-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-02-14 253-328-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-02-05 253-243-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2014-02-05 253-243-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2014-01-14 253-259-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-01-14 253-259-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-01-14 253-328-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-01-14 253-328-2XXX 2000–2999Assigned 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.