NumberResearchRecent thousands-block assignments
7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-07-26 | 503-298-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | ASTORIA | OR |
| 2002-07-12 | 503-376-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | MCMINNVL | OR |
| 2002-04-15 | 503-213-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVERTON | OR |
| 2002-04-15 | 503-343-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | CLACKAMAS | OR |
| 2002-04-15 | 503-465-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | GRESHAM | OR |
| 2002-04-15 | 503-476-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | NEWBERG | OR |
| 2002-04-15 | 503-622-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | HOOD LAND | OR |
| 2002-04-15 | 503-925-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SHERWOOD | OR |
| 2002-04-15 | 503-980-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | WOODBURN | OR |
| 2002-02-15 | 503-468-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | ASTORIA | OR |
| — | 503-715-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | 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.