NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 925-673 | PACIFIC BELL | 9740 | CLAYTON | CA | |
| 925-674 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-675 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-676 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-677 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-678 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DANVILLE | CA | |
| 925-679 | PACIFIC BELL | 9740 | ECONTRCOST | CA | |
| 925-680 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-681 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-682 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-683 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DANVILLE | CA | |
| 925-684 | PACIFIC BELL | 9740 | ECONTRCOST | CA | |
| 925-685 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-686 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-687 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-688 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-689 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-690 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLAYTON | CA | |
| 925-691 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-692 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-693 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | CLAYTON | CA | |
| 925-694 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA | |
| 925-695 | METROPCS, INC. | 5562 | CONCORD | CA | |
| 925-698 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PITTSBURG | CA | |
| 925-699 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA | |
| 925-700 | CA | ||||
| 925-701 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PLEASANTON | CA | |
| 925-706 | PACIFIC BELL | 9740 | ANTIOCH | CA | |
| 925-709 | PACIFIC BELL | 9740 | PSBG WEST | CA | |
| 925-711 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 925-718 | ONVOY, LLC - CA | 649C | DANVILLE | 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 | |
| 925-727 | METROPCS, INC. | 5562 | ANTIOCH | CA | |
| 925-730 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-732 | ONVOY, LLC - CA | 649C | ANTIOCH | CA | |
| 925-734 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-735 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-736 | PACIFIC BELL | 9740 | DANVILLE | CA | |
| 925-737 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-738 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA | |
| 925-739 | CA | ||||
| 925-743 | PACIFIC BELL | 9740 | DANVILLE | CA | |
| 925-746 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-750 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA | |
| 925-752 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANTIOCH | CA | |
| 925-753 | PACIFIC BELL | 9740 | ANTIOCH | CA | |
| 925-754 | PACIFIC BELL | 9740 | ANTIOCH | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.