NumberResearchRecent thousands-block assignments
0 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, all time — NPA 503
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-11-08 | 503-300-3XXX | 3000–3999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | BAY CITY | OR |
| 2017-11-08 | 503-483-3XXX | 3000–3999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | PACIFIC CY | OR |
| 2017-11-08 | 503-664-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | BEAVER | OR |
| 2017-01-04 | 503-354-3XXX | 3000–3999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | TILLAMOOK | OR |
| 2015-02-16 | 503-917-7XXX | 7000–7999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | DALLAS | OR |
| 2010-10-22 | 503-732-2XXX | 2000–2999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | BEAVER CRK | OR |
| 2010-04-23 | 503-272-2XXX | 2000–2999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | GOVENTCAMP | OR |
| 2010-04-08 | 503-900-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | LYONS | OR |
| 2009-06-22 | 503-600-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | MOLALLA | OR |
| 2009-06-22 | 503-800-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | GERVAIS | OR |
| 2009-06-22 | 503-900-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | LYONS | OR |
| 2009-06-22 | 503-979-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | STAYTON | OR |
| 2009-06-22 | 503-996-1XXX | 1000–1999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | MOUNTANGEL | OR |
| 2009-06-16 | 503-479-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | CLACKAMAS | OR |
| 2009-06-16 | 503-482-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | STFRD-SNDY | OR |
| 2009-06-16 | 503-564-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | HOOD LAND | OR |
| 2009-06-16 | 503-592-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | CANBYNEEDY | OR |
| 2009-06-16 | 503-676-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | GRESHAM | OR |
| 2009-06-16 | 503-743-1XXX | 1000–1999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | AUMSVLTRNR | OR |
| 2009-06-16 | 503-776-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | AURORA | OR |
| 2009-06-16 | 503-843-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | SHERIDAN | OR |
| 2009-06-16 | 503-874-4XXX | 4000–4999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | SILVERTON | OR |
| 2009-06-16 | 503-876-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | WILLAMINA | OR |
| 2009-06-16 | 503-879-7XXX | 7000–7999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | GRANDRONDE | OR |
| 2009-06-16 | 503-897-6XXX | 6000–6999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | MILL CITY | OR |
| 2009-06-16 | 503-983-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | SALEM | OR |
| 2009-06-04 | 503-902-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | WOODBURN | 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.