NumberResearchThousands-blocks in 503-482
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 503-482 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 503 blocks
Most active assignees, all time — NPA 503
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-06-16 | 503-482-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - OR | 936F | STFRD-SNDY | OR |
| — | 503-482-1XXX | 1000–1999 | Reserved | LEVEL 3 TELECOM OF OREGON, LLC - OR | 7537 | STFRD-SNDY | OR |
| 2011-02-23 | 503-482-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | STFRD-SNDY | OR |
| 2014-05-16 | 503-482-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | STFRD-SNDY | OR |
| 2011-09-01 | 503-482-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | STFRD-SNDY | OR |
| 2006-08-04 | 503-482-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | STFRD-SNDY | OR |
| 2007-05-02 | 503-482-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STFRD-SNDY | OR |
| 2007-05-02 | 503-482-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | STFRD-SNDY | OR |
| 2010-01-21 | 503-482-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | STFRD-SNDY | OR |
| 2010-01-21 | 503-482-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | STFRD-SNDY | 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.