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
2021-05-27 253-600-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2021-05-27 253-600-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E AUBURN WA
2021-05-27 253-600-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E AUBURN WA
2021-05-27 253-600-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E AUBURN WA
2021-05-27 253-642-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2021-05-27 253-642-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2021-05-27 253-652-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2021-05-25 253-346-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J TACOMA WA
2021-05-17 253-231-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2021-05-17 253-346-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-05-17 253-346-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-05-17 253-346-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-05-15 253-275-9XXX 9000–9999Assigned TON80 COMMUNICATIONS, LLC 516J AUBURN WA
2021-05-11 253-338-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E AUBURN WA
2021-05-05 253-264-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SUMNER WA
2021-04-29 253-356-9XXX 9000–9999Assigned FRACTEL, LLC 965H TACOMA WA
2021-04-29 253-400-0XXX 0000–0999Assigned FRACTEL, LLC 965H GIG HARBOR WA
2021-04-29 253-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H AUBURN WA
2021-04-27 253-523-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H TACOMAWVLY WA
2021-04-27 253-523-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H TACOMAWVLY WA
2021-04-16 253-321-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J SUMNER WA
2021-04-02 253-338-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-04-02 253-338-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-04-02 253-338-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-04-02 253-361-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2021-04-02 253-361-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2021-04-02 253-361-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2021-04-02 253-368-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-04-02 253-368-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-03-31 253-346-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2021-03-31 253-346-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2021-03-31 253-544-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2021-03-31 253-544-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2021-03-31 253-544-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2021-03-31 253-544-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2021-03-29 253-501-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SUMNER WA
2021-03-24 253-264-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2021-03-18 253-346-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-18 253-346-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-18 253-346-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-17 253-518-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2021-03-15 253-366-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-15 253-366-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-15 253-553-0XXX 0000–0999Assigned STRATUS NETWORKS 495J AUBURN WA
2021-03-10 253-296-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2021-03-10 253-296-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2021-03-10 253-296-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2021-03-10 253-296-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2021-03-10 253-296-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2021-03-05 253-313-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR 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.