NumberResearchRecent prefix assignments
5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 541-350 | T-MOBILE USA, INC. | 6529 | BEND | OR | |
| 541-380 | T-MOBILE USA, INC. | 6529 | HOOD RIVER | OR | |
| 541-390 | T-MOBILE USA, INC. | 6529 | BEND | OR | |
| 541-391 | T-MOBILE USA, INC. | 6529 | ROSEBURG | OR | |
| 541-400 | T-MOBILE USA, INC. | 6529 | HOOD RIVER | OR | |
| 541-441 | T-MOBILE USA, INC. | 6529 | GRANTSPASS | OR | |
| 541-513 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-514 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-515 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-543 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-570 | T-MOBILE USA, INC. | 6529 | LEBANON | OR | |
| 541-578 | T-MOBILE USA, INC. | 6529 | MOSIER | OR | |
| 541-579 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-650 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-720 | T-MOBILE USA, INC. | 6529 | HERMISTON | OR | |
| 541-731 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-777 | T-MOBILE USA, INC. | 6529 | MADRAS | OR | |
| 541-788 | T-MOBILE USA, INC. | 6529 | BEND | OR | |
| 541-829 | T-MOBILE USA, INC. | 6529 | CORVALLIS | OR | |
| 541-870 | T-MOBILE USA, INC. | 6529 | EUGENE | OR | |
| 541-905 | T-MOBILE USA, INC. | 6529 | ALBANY | OR | |
| 541-908 | T-MOBILE USA, INC. | 6529 | CORVALLIS | OR | |
| 541-936 | T-MOBILE USA, INC. | 6529 | ALBANY | OR | |
| 541-948 | T-MOBILE USA, INC. | 6529 | BEND | OR | |
| 559-202 | T-MOBILE USA, INC. | 6529 | PORTERVL | CA | |
| 559-213 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-217 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-270 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-273 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-306 | T-MOBILE USA, INC. | 6529 | PORTERVL | CA | |
| 559-307 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-333 | T-MOBILE USA, INC. | 6529 | PORTERVL | CA | |
| 559-344 | T-MOBILE USA, INC. | 6529 | FOWLER | CA | |
| 559-351 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-403 | T-MOBILE USA, INC. | 6529 | CARUTHERS | CA | |
| 559-469 | T-MOBILE USA, INC. | 6529 | HANFORD | CA | |
| 559-728 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 559-800 | T-MOBILE USA, INC. | 6529 | FRESNO | CA | |
| 562-208 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-209 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-212 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-225 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-230 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-234 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-235 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-244 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-248 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-254 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-284 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-314 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.