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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2008-06-19 503-953-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2008-06-12 503-468-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ASTORIA OR
2008-06-12 503-501-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2008-06-12 503-501-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2008-06-12 503-501-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2008-06-09 503-501-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2008-06-06 503-400-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2008-06-04 503-505-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2008-06-04 503-586-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2008-06-04 503-616-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2008-05-28 503-400-3XXX 3000–3999Assigned ONVOY, LLC - OR 750E SALEM OR
2008-05-28 503-501-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2008-05-21 503-389-4XXX 4000–4999Assigned ONVOY, LLC - OR 750E NORTH PL OR
2008-05-21 503-951-4XXX 4000–4999Assigned ONVOY, LLC - OR 750E WOODBURN OR
2008-05-07 503-512-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 GRESHAM OR
2008-05-06 503-336-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 BEAVERTON OR
2008-05-05 503-360-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 PORTLAND OR
2008-04-23 503-400-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2008-04-23 503-400-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2008-04-23 503-400-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2008-04-23 503-719-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-04-23 503-719-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-04-18 503-808-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2008-04-16 503-354-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TILLAMOOK OR
2008-04-15 503-941-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BEAVERTON OR
2008-04-15 503-941-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BEAVERTON OR
2008-03-24 503-468-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 ASTORIA OR
2008-03-21 503-360-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-21 503-360-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-19 503-486-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J STFRD-SNDY OR
2008-03-19 503-496-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS OR
2008-03-13 503-360-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 PORTLAND OR
2008-03-13 503-560-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MCMINNVL OR
2008-03-11 503-501-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-11 503-501-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-07 503-707-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2008-03-07 503-707-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2008-03-07 503-828-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2008-03-06 503-686-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BEAVERTON OR
2008-03-04 503-954-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2008-03-03 503-935-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2008-03-03 503-935-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2008-02-22 503-935-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 PORTLAND OR
2008-02-20 503-896-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2008-02-19 503-594-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS 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.