NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2004-06-10 503-548-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-06-10 503-548-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-06-10 503-984-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WOODBURN OR
2004-06-03 503-438-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 ST HELENS OR
2004-06-03 503-457-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 TILLAMOOK OR
2004-06-03 503-897-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 MILL CITY OR
2004-05-24 503-547-9XXX 9000–9999Assigned METROPCS, INC. 5562 BEAVERTON OR
2004-05-04 503-308-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 CLATSKANIE OR
2004-05-04 503-395-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 RAINIER OR
2004-05-04 503-484-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-04-07 503-467-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2004-04-07 503-467-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2004-04-07 503-467-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2004-04-07 503-467-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2004-03-23 503-453-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-03-23 503-473-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-03-23 503-484-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-03-10 503-218-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 STFRD-SNDY OR
2004-02-25 503-453-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-02-12 503-302-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2004-02-12 503-302-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2004-01-28 503-548-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2004-01-26 503-453-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2004-01-15 503-479-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS OR
2004-01-13 503-914-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2004-01-13 503-916-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-12-05 503-914-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-12-05 503-914-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-11-25 503-207-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
2003-11-25 503-914-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2003-11-25 503-914-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2003-11-18 503-428-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SALEM OR
2003-10-31 503-290-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-327-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-419-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-419-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-473-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-734-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-31 503-889-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-10-23 503-874-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 SILVERTON OR
2003-10-21 503-302-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2003-10-21 503-302-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2003-10-21 503-302-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2003-08-19 503-302-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2003-08-11 503-419-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2003-08-06 503-734-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-08-06 503-734-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-08-06 503-734-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2003-08-06 503-961-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2003-08-06 503-961-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.