NumberResearchRecent thousands-block assignments
7 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, last 30 days — NPA 503
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-08-08 | 503-724-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-724-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-928-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-928-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-08 | 503-928-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-07 | 503-206-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORTLAND | OR |
| 2006-08-07 | 503-206-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORTLAND | OR |
| 2006-08-07 | 503-206-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORTLAND | OR |
| 2006-08-07 | 503-206-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORTLAND | OR |
| 2006-08-07 | 503-206-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORTLAND | OR |
| 2006-08-07 | 503-376-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MCMINNVL | OR |
| 2006-08-04 | 503-482-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | STFRD-SNDY | OR |
| 2006-08-02 | 503-593-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-02 | 503-593-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-08-02 | 503-593-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-31 | 503-839-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-31 | 503-933-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-28 | 503-576-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SALEM | OR |
| 2006-07-24 | 503-875-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-24 | 503-875-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-07-10 | 503-212-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | CLACKAMAS | OR |
| 2006-06-28 | 503-840-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BEAVERTON | OR |
| 2006-06-28 | 503-840-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BEAVERTON | OR |
| 2006-06-28 | 503-868-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | GRAND IS | OR |
| 2006-06-26 | 503-206-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
| 2006-06-13 | 503-821-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
| 2006-06-08 | 503-206-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | PORTLAND | OR |
| 2006-06-08 | 503-468-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ASTORIA | OR |
| 2006-05-26 | 503-395-3XXX | 3000–3999 | Assigned | ONVOY, LLC - OR | 750E | RAINIER | OR |
| 2006-05-26 | 503-840-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | BEAVERTON | OR |
| 2006-05-25 | 503-206-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
| 2006-05-25 | 503-290-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
| 2006-05-25 | 503-820-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
| 2006-05-23 | 503-432-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-05-23 | 503-853-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-05-23 | 503-853-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2006-05-22 | 503-987-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | SCAPPOOSE | 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.