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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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 480-703 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 480-720 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 480-797 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 501-240 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-256 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-260 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-310 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-346 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-348 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-349 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-606 | T-MOBILE USA, INC. | 6529 | CABOT | AR | |
| 501-693 | T-MOBILE USA, INC. | 6529 | HOTSPRINGS | AR | |
| 501-779 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 501-960 | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR | |
| 503-209 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-267 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-269 | T-MOBILE USA, INC. | 6529 | SALEM | OR | |
| 503-309 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-317 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-334 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-358 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-380 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-381 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-409 | T-MOBILE USA, INC. | 6529 | SALEM | OR | |
| 503-420 | T-MOBILE USA, INC. | 6529 | DALLAS | OR | |
| 503-421 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-422 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-449 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-481 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-490 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-515 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-516 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-519 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-544 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-560 | T-MOBILE USA, INC. | 6529 | MCMINNVL | OR | |
| 503-569 | T-MOBILE USA, INC. | 6529 | SALEM | OR | |
| 503-572 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-602 | T-MOBILE USA, INC. | 6529 | SALEM | OR | |
| 503-740 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-741 | T-MOBILE USA, INC. | 6529 | ASTORIA | OR | |
| 503-750 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-752 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-753 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-754 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-756 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-757 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-793 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-809 | T-MOBILE USA, INC. | 6529 | NORTH PL | OR | |
| 503-810 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR | |
| 503-849 | T-MOBILE USA, INC. | 6529 | PORTLAND | OR |
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.