NumberResearchRecent prefix assignments
5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
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 |
|---|---|---|---|---|---|
| 309-631 | T-MOBILE USA, INC. | 6529 | ROCKISLAND | IL | |
| 309-989 | T-MOBILE USA, INC. | 6529 | PEORIA | IL | |
| 310-213 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-272 | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA | |
| 310-345 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-346 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-359 | T-MOBILE USA, INC. | 6529 | MALIBU | CA | |
| 310-400 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-404 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-421 | T-MOBILE USA, INC. | 6529 | REDONDO | CA | |
| 310-438 | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA | |
| 310-493 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-497 | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA | |
| 310-505 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-590 | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA | |
| 310-594 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-619 | T-MOBILE USA, INC. | 6529 | TORRANCE | CA | |
| 310-621 | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA | |
| 310-628 | T-MOBILE USA, INC. | 6529 | SNMN SNMN | CA | |
| 310-634 | T-MOBILE USA, INC. | 6529 | TORRANCE | CA | |
| 310-678 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-684 | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA | |
| 310-686 | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA | |
| 310-704 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-709 | T-MOBILE USA, INC. | 6529 | W ANGELES | CA | |
| 310-714 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-722 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 310-770 | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA | |
| 310-774 | T-MOBILE USA, INC. | 6529 | MALIBU | CA | |
| 310-809 | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA | |
| 310-863 | T-MOBILE USA, INC. | 6529 | REDONDO | CA | |
| 310-867 | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA | |
| 310-872 | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA | |
| 310-876 | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA | |
| 310-901 | T-MOBILE USA, INC. | 6529 | TORRANCE | CA | |
| 310-910 | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA | |
| 310-927 | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA | |
| 310-999 | T-MOBILE USA, INC. | 6529 | CMTN GRDN | CA | |
| 312-217 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-285 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-287 | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL | |
| 312-296 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-340 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-371 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-375 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-388 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-399 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-437 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-446 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL | |
| 312-451 | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.