NumberResearchRecent thousands-block assignments
7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-03-12 | 503-983-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | SALEM | OR |
| 2009-03-09 | 503-897-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | MILL CITY | OR |
| 2009-03-03 | 503-847-2XXX | 2000–2999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | PORTLAND | OR |
| 2009-03-02 | 503-383-7XXX | 7000–7999 | Assigned | DATAVISION COMMUNICATIONS LLC | 5511 | SALEM | OR |
| 2009-03-02 | 503-567-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | BEAVERTON | OR |
| 2009-02-20 | 503-575-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OR | 750E | PORTLAND | OR |
| 2009-02-10 | 503-433-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OR | 750E | NORTH PL | OR |
| 2009-02-09 | 503-575-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2009-02-09 | 503-575-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2009-02-09 | 503-575-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2009-01-29 | 503-583-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MCMINNVL | OR |
| 2009-01-28 | 503-837-1XXX | 1000–1999 | Assigned | ONVOY, LLC - OR | 750E | DALLAS | OR |
| 2009-01-20 | 503-575-4XXX | 4000–4999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | PORTLAND | OR |
| 2009-01-09 | 503-583-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | MCMINNVL | OR |
| 2008-12-19 | 503-915-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2008-12-19 | 503-915-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2008-12-08 | 503-208-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2008-12-01 | 503-801-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TILLAMOOK | OR |
| 2008-11-20 | 503-847-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2008-11-20 | 503-847-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2008-11-18 | 503-575-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PORTLAND | OR |
| 2008-11-18 | 503-575-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PORTLAND | OR |
| 2008-11-18 | 503-575-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PORTLAND | OR |
| 2008-11-17 | 503-728-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLATSKANIE | OR |
| 2008-11-17 | 503-766-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRESHAM | OR |
| 2008-11-13 | 503-689-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALEM | OR |
| 2008-11-13 | 503-689-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALEM | OR |
| 2008-11-11 | 503-814-0XXX | 0000–0999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | SALEM | OR |
| 2008-11-11 | 503-814-8XXX | 8000–8999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | SALEM | OR |
| 2008-11-11 | 503-814-9XXX | 9000–9999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | SALEM | OR |
| 2008-11-05 | 503-208-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-11-05 | 503-926-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-11-05 | 503-926-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-11-05 | 503-926-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2008-10-30 | 503-272-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | GOVENTCAMP | OR |
| 2008-10-30 | 503-308-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | CLATSKANIE | OR |
| 2008-10-30 | 503-354-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | TILLAMOOK | OR |
| 2008-10-30 | 503-383-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | SALEM | OR |
| 2008-10-30 | 503-383-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | SALEM | OR |
| 2008-10-30 | 503-389-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | NORTH PL | OR |
| 2008-10-30 | 503-395-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | RAINIER | OR |
| 2008-10-30 | 503-406-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | CLACKAMAS | OR |
| 2008-10-30 | 503-427-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | STFRD-SNDY | OR |
| 2008-10-30 | 503-451-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | CLACKAMAS | OR |
| 2008-10-30 | 503-512-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | GRESHAM | OR |
| 2008-10-30 | 503-512-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | GRESHAM | OR |
| 2008-10-30 | 503-564-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | HOOD LAND | OR |
| 2008-10-30 | 503-592-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | CANBYNEEDY | OR |
| 2008-10-30 | 503-597-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | BEAVERTON | OR |
| 2008-10-30 | 503-609-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | CORBETT | 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.