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
2021-02-28 253-366-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2021-02-18 253-361-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2021-02-17 253-366-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-02-17 253-366-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-02-17 253-366-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-02-16 253-210-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GRAHAM WA
2021-02-16 253-466-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PUYALLUP WA
2021-02-11 253-449-1XXX 1000–1999Assigned TELNYX LLC 073H DES MOINES WA
2021-02-04 253-553-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F AUBURN WA
2021-02-03 253-366-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TACOMA WA
2021-02-03 253-366-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TACOMA WA
2021-02-03 253-366-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2021-02-03 253-366-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TACOMA WA
2021-01-28 253-867-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KENT WA
2021-01-28 253-867-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E KENT WA
2021-01-28 253-867-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E KENT WA
2021-01-27 253-553-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2021-01-27 253-553-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2021-01-27 253-553-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2021-01-26 253-523-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H TACOMAWVLY WA
2021-01-26 253-523-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H TACOMAWVLY WA
2021-01-26 253-523-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H TACOMAWVLY WA
2021-01-25 253-368-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-01-25 253-368-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-01-25 253-368-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2021-01-20 253-528-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2021-01-20 253-528-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2021-01-06 253-317-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-01-06 253-317-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-01-06 253-317-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2021-01-06 253-342-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2020-12-30 253-210-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J GRAHAM WA
2020-12-16 253-337-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMAWVLY WA
2020-12-16 253-765-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2020-12-11 253-262-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2020-12-04 253-317-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2020-12-04 253-317-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2020-12-04 253-368-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2020-12-04 253-368-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2020-11-27 253-262-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E GRAHAM WA
2020-11-27 253-262-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E GRAHAM WA
2020-11-27 253-262-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E GRAHAM WA
2020-11-25 253-215-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ROY WA
2020-11-25 253-785-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2020-11-25 253-785-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2020-11-23 253-893-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E KENT WA
2020-11-23 253-893-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KENT WA
2020-11-23 253-893-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KENT WA
2020-11-13 253-368-0XXX 0000–0999Assigned TELNYX LLC 073H AUBURN WA
2020-11-11 253-478-2XXX 2000–2999Assigned TELNYX LLC 073H KENT 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.