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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-08-12 | 503-200-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | PORTLAND | OR |
| 2014-07-29 | 503-328-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | GRESHAM | OR |
| 2013-08-22 | 503-444-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | PORTLAND | OR |
| 2010-10-19 | 503-862-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | SHERWOOD | OR |
| 2010-08-17 | 503-840-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | BEAVERTON | OR |
| 2010-07-23 | 503-486-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | STFRD-SNDY | OR |
| 2010-05-10 | 503-506-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | STFRD-SNDY | OR |
| 2008-08-14 | 503-912-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | GRESHAM | OR |
| 2007-07-31 | 503-974-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | CLACKAMAS | OR |
| 2003-11-18 | 503-428-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | SALEM | 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.