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 |
|---|---|---|---|---|---|
| 619-678 | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA | |
| 619-723 | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA | |
| 619-750 | T-MOBILE USA, INC. | 6529 | LA MESA | CA | |
| 619-764 | T-MOBILE USA, INC. | 6529 | SNDG SNDG | CA | |
| 619-805 | T-MOBILE USA, INC. | 6529 | CORONADO | CA | |
| 619-856 | T-MOBILE USA, INC. | 6529 | NATIONALCY | CA | |
| 619-865 | T-MOBILE USA, INC. | 6529 | CORONADO | CA | |
| 619-867 | T-MOBILE USA, INC. | 6529 | LA MESA | CA | |
| 620-217 | T-MOBILE USA, INC. | 6529 | HESSTON | KS | |
| 620-262 | T-MOBILE USA, INC. | 6529 | WINFIELD | KS | |
| 620-474 | T-MOBILE USA, INC. | 6529 | HUTCHINSON | KS | |
| 620-480 | T-MOBILE USA, INC. | 6529 | MCPHERSON | KS | |
| 623-210 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-217 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-221 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-261 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-297 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-326 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-330 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-332 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-340 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-341 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-399 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-451 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-521 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-533 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-570 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-628 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 623-703 | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ | |
| 626-230 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-231 | T-MOBILE USA, INC. | 6529 | ARCADIA | CA | |
| 626-232 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-234 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-235 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-244 | T-MOBILE USA, INC. | 6529 | ARCADIA | CA | |
| 626-316 | T-MOBILE USA, INC. | 6529 | PSDN PSDN | CA | |
| 626-367 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-383 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-391 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-392 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-393 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-394 | T-MOBILE USA, INC. | 6529 | PSDN PSDN | CA | |
| 626-399 | T-MOBILE USA, INC. | 6529 | PSDN PSDN | CA | |
| 626-417 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-466 | T-MOBILE USA, INC. | 6529 | SIERRAMADR | CA | |
| 626-478 | T-MOBILE USA, INC. | 6529 | EL MONTE | CA | |
| 626-488 | T-MOBILE USA, INC. | 6529 | COVINA | CA | |
| 626-492 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-500 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | CA | |
| 626-627 | T-MOBILE USA, INC. | 6529 | ALHAMBRA | 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.