NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 503
ONVOY, LLC - OR 4
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 1
BANDWIDTH.COM CLEC, LLC - OR 1
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
2005-09-15 503-758-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-15 503-951-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 WOODBURN OR
2005-09-14 503-934-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-14 503-934-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SALEM OR
2005-09-12 503-664-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 BEAVER OR
2005-09-02 503-758-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-09-02 503-758-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-22 503-535-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-19 503-758-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-08-19 503-758-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-08-19 503-758-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-08-19 503-758-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-08-19 503-758-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-08-15 503-396-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 ST HELENS OR
2005-08-12 503-480-4XXX 4000–4999Assigned METROPCS, INC. 5562 SALEM OR
2005-08-12 503-820-1XXX 1000–1999Assigned METROPCS, INC. 5562 PORTLAND OR
2005-08-11 503-308-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 CLATSKANIE OR
2005-08-11 503-901-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-11 503-901-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-11 503-901-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-11 503-901-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-11 503-922-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-08-09 503-422-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-08-09 503-779-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2005-08-09 503-779-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2005-08-05 503-901-2XXX 2000–2999Assigned METROPCS, INC. 5562 PORTLAND OR
2005-07-29 503-269-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2005-07-21 503-922-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-07-21 503-922-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-07-21 503-922-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-07-21 503-922-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-07-12 503-779-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2005-07-12 503-779-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2005-07-11 503-218-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 STFRD-SNDY OR
2005-07-11 503-956-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-07-11 503-956-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-07-11 503-956-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-07-11 503-956-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-07-07 503-265-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-07-07 503-369-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST HELENS OR
2005-07-07 503-382-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-07-07 503-432-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR

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.