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
2014-12-10 253-455-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-12-10 253-455-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-11-26 253-398-6XXX 6000–6999Assigned METROPCS, INC. 5562 KENT WA
2014-11-26 253-652-4XXX 4000–4999Assigned METROPCS, INC. 5562 DES MOINES WA
2014-11-26 253-697-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PUYALLUP WA
2014-11-26 253-766-7XXX 7000–7999Assigned METROPCS, INC. 5562 KENT WA
2014-10-30 253-246-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2014-10-29 253-432-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2014-10-27 253-501-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2014-10-21 253-213-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-10-20 253-237-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DES MOINES WA
2014-10-20 253-780-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GRAHAM WA
2014-10-16 253-258-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F AUBURN WA
2014-10-16 253-455-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-10-16 253-455-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-10-16 253-944-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMAWVLY WA
2014-09-23 253-258-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-09-23 253-258-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-09-18 253-455-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-09-18 253-455-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-09-18 253-754-7XXX 7000–7999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-09-18 253-883-7XXX 7000–7999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-09-18 253-954-2XXX 2000–2999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-09-17 253-213-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-09-17 253-213-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2014-09-12 253-213-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-09-12 253-213-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-09-12 253-244-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-09-12 253-244-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2014-09-12 253-259-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-09-12 253-303-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-09-12 253-358-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-09-12 253-391-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-09-03 253-259-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2014-09-03 253-313-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2014-09-02 253-754-8XXX 8000–8999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-09-02 253-754-9XXX 9000–9999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2014-09-02 253-766-9XXX 9000–9999Assigned METROPCS, INC. 5562 KENT WA
2014-08-29 253-237-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2014-08-29 253-328-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2014-08-29 253-328-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TACOMA WA
2014-08-29 253-466-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2014-08-29 253-487-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KENT WA
2014-08-29 253-501-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SUMNER WA
2014-08-29 253-780-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E GRAHAM WA
2014-08-22 253-391-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-08-22 253-391-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-08-22 253-391-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-08-18 253-867-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2014-08-15 253-259-5XXX 5000–5999Assigned 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.