NumberResearchRecent prefix assignments
11 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
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 925-438 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ORINDA | CA | |
| 925-444 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LAFAYETTE | CA | |
| 925-452 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DUBLN-SNRM | CA | |
| 925-474 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PLEASANTON | CA | |
| 925-480 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA | |
| 925-482 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WALNUT CRK | CA | |
| 925-498 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA | |
| 925-526 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PITTSBURG | CA | |
| 925-583 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LIVERMORE | CA | |
| 925-587 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DUBLN-SNRM | CA | |
| 925-588 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WALNUT CRK | CA | |
| 925-592 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | MORAGA | CA | |
| 925-678 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DANVILLE | CA | |
| 925-701 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PLEASANTON | CA | |
| 925-723 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | MARTINEZ | CA | |
| 925-724 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LIVERMORE | CA | |
| 925-725 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DANVILLE | CA | |
| 925-726 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CONCORD | CA | |
| 925-835 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SUNOL | CA | |
| 925-849 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CONCORD | CA | |
| 925-954 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WALNUT CRK | CA | |
| 949-328 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SADLBK VLY | CA | |
| 949-331 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-342 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LAGUNA BCH | CA | |
| 949-373 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAPITRNVLY | CA | |
| 949-428 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-444 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAPITRNVLY | CA | |
| 949-478 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWPORTBCH | CA | |
| 949-483 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-486 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-540 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SADLBK VLY | CA | |
| 949-545 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAPITRNVLY | CA | |
| 949-554 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWPORTBCH | CA | |
| 949-599 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SADLBK VLY | CA | |
| 949-655 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-681 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-751 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-777 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-791 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWPORTBCH | CA | |
| 949-835 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TRABUCO | CA | |
| 949-864 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-900 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SADLBK VLY | CA | |
| 949-999 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWPORTBCH | CA | |
| 951-284 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CORONA | CA | |
| 951-300 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-367 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-530 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-531 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CORONA | CA | |
| 951-588 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ARLINGTON | CA | |
| 951-749 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | MIRA LOMA | 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.