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 |
|---|---|---|---|---|---|---|---|
| 2023-08-30 | 503-420-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | DALLAS | OR |
| 2016-09-08 | 503-660-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | GRESHAM | OR |
| 2016-02-10 | 503-843-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | SHERIDAN | OR |
| 2015-09-23 | 503-479-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | CLACKAMAS | OR |
| 2014-09-18 | 503-455-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | WESTPORT | OR |
| 2013-11-04 | 503-837-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | DALLAS | OR |
| 2013-10-15 | 503-994-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | WARRENTON | OR |
| 2013-10-14 | 503-765-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF OREGON, LLC - OR | 157F | 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.