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
2007-03-28 503-433-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NORTH PL OR
2007-03-28 503-951-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOODBURN OR
2007-03-23 503-837-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALLAS OR
2007-03-20 503-486-7XXX 7000–7999Assigned ONVOY, LLC - OR 750E STFRD-SNDY OR
2007-03-20 503-749-6XXX 6000–6999Assigned ONVOY, LLC - OR 750E AUMSVLTRNR OR
2007-03-20 503-854-7XXX 7000–7999Assigned ONVOY, LLC - OR 750E DETROIT OR
2007-03-20 503-874-6XXX 6000–6999Assigned ONVOY, LLC - OR 750E SILVERTON OR
2007-03-20 503-897-9XXX 9000–9999Assigned ONVOY, LLC - OR 750E MILL CITY OR
2007-03-16 503-974-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CLACKAMAS OR
2007-03-12 503-935-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-935-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-935-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-935-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-935-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-935-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-954-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-12 503-954-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-03-06 503-586-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2007-03-06 503-991-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SALEM OR
2007-02-28 503-210-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS OR
2007-02-26 503-268-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-268-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-268-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-268-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-270-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-270-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-270-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-270-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-431-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-431-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2007-02-26 503-960-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-26 503-960-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-477-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-995-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-995-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-995-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-995-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-23 503-995-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-16 503-686-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2007-02-16 503-686-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2007-02-13 503-995-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2007-02-13 503-995-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.