NumberResearchRecent prefix assignments
352 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
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 951-660 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA | |
| 951-662 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-665 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | HEMT SNJC | CA | |
| 951-666 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA | |
| 951-667 | T-MOBILE USA, INC. | 6529 | TEMSCL CNY | CA | |
| 951-671 | UTILITY TELECOM GROUP, LLC - CA | 9262 | MURRIETA | CA | |
| 951-672 | FRONTIER CALIFORNIA INC. | 2319 | SUN CITY | CA | |
| 951-674 | FRONTIER CALIFORNIA INC. | 2319 | ELSINORE | CA | |
| 951-675 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIVERSIDE | CA | |
| 951-676 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-677 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-678 | FRONTIER CALIFORNIA INC. | 2319 | ELSINORE | CA | |
| 951-679 | FRONTIER CALIFORNIA INC. | 2319 | SUN CITY | CA | |
| 951-680 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-681 | PACIFIC BELL | 9740 | MIRA LOMA | CA | |
| 951-682 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-683 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-684 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-685 | PACIFIC BELL | 9740 | MIRA LOMA | CA | |
| 951-686 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-687 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-688 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-689 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-693 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-694 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-695 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-696 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-697 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-698 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-699 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-700 | CA | ||||
| 951-704 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | MURRIETA | CA | |
| 951-707 | METROPCS NETWORKS, LLC | 899D | CORONA | CA | |
| 951-708 | BANDWIDTH.COM CLEC, LLC - CA | 981E | HEMT SAGE | CA | |
| 951-710 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-711 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 951-712 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-715 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-719 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-722 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PERRIS | CA | |
| 951-723 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | SUN CITY | CA | |
| 951-727 | PACIFIC BELL | 9740 | MIRA LOMA | CA | |
| 951-729 | IP HORIZON LLC | 515J | ARLINGTON | CA | |
| 951-733 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA | |
| 951-734 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-735 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-736 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-737 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-738 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-739 | PACIFIC BELL | 9740 | CORONA | CA |
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.