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 |
|---|---|---|---|---|---|
| 562-316 | T-MOBILE USA, INC. | 6529 | LAKEWOOD | CA | |
| 562-318 | T-MOBILE USA, INC. | 6529 | WHITTIER | CA | |
| 562-374 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-387 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-388 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-396 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-416 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-417 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-418 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-440 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-441 | T-MOBILE USA, INC. | 6529 | DOWNEY | CA | |
| 562-449 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA | |
| 562-503 | T-MOBILE USA, INC. | 6529 | NORWALK | CA | |
| 562-541 | T-MOBILE USA, INC. | 6529 | LAKEWOOD | CA | |
| 562-577 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-704 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-739 | T-MOBILE USA, INC. | 6529 | LAKEWOOD | CA | |
| 562-755 | T-MOBILE USA, INC. | 6529 | LAKEWOOD | CA | |
| 562-824 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 562-843 | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA | |
| 563-213 | T-MOBILE USA, INC. | 6529 | DUBUQUE | IA | |
| 563-495 | T-MOBILE USA, INC. | 6529 | DUBUQUE | IA | |
| 563-505 | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA | |
| 563-506 | T-MOBILE USA, INC. | 6529 | MUSCATINE | IA | |
| 563-516 | T-MOBILE USA, INC. | 6529 | ELKADER | IA | |
| 563-517 | T-MOBILE USA, INC. | 6529 | DECORAH | IA | |
| 563-518 | T-MOBILE USA, INC. | 6529 | WEST UNION | IA | |
| 563-529 | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA | |
| 563-554 | T-MOBILE USA, INC. | 6529 | MUSCATINE | IA | |
| 563-559 | T-MOBILE USA, INC. | 6529 | CLINTON | IA | |
| 563-564 | T-MOBILE USA, INC. | 6529 | DUBUQUE | IA | |
| 563-570 | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA | |
| 563-571 | T-MOBILE USA, INC. | 6529 | MUSCATINE | IA | |
| 563-579 | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA | |
| 563-593 | T-MOBILE USA, INC. | 6529 | CLINTON | IA | |
| 563-650 | T-MOBILE USA, INC. | 6529 | DAVENPORT | IA | |
| 563-889 | T-MOBILE USA, INC. | 6529 | TIPTON | IA | |
| 567-284 | T-MOBILE USA, INC. | 6529 | ASHLAND | OH | |
| 573-216 | T-MOBILE USA, INC. | 6529 | LKOZKOSBCH | MO | |
| 573-219 | T-MOBILE USA, INC. | 6529 | COLUMBIA | MO | |
| 573-230 | T-MOBILE USA, INC. | 6529 | JEFFERSNCY | MO | |
| 573-268 | T-MOBILE USA, INC. | 6529 | COLUMBIA | MO | |
| 573-353 | T-MOBILE USA, INC. | 6529 | JEFFERSNCY | MO | |
| 573-356 | T-MOBILE USA, INC. | 6529 | COLUMBIA | MO | |
| 573-424 | T-MOBILE USA, INC. | 6529 | COLUMBIA | MO | |
| 573-434 | T-MOBILE USA, INC. | 6529 | LKOZKOSBCH | MO | |
| 573-462 | T-MOBILE USA, INC. | 6529 | JEFFERSNCY | MO | |
| 573-467 | T-MOBILE USA, INC. | 6529 | ROLLA | MO | |
| 573-482 | T-MOBILE USA, INC. | 6529 | FARMINGTON | MO | |
| 573-512 | T-MOBILE USA, INC. | 6529 | FTLENARDWD | MO |
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.