All assignees
140 prefixes in 840 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 840-400 | ONTARIO | 965H | 2021-01-04 | Yes |
| 840-411 | MULT | — | — | |
| 840-444 | ARROWHEAD | 965H | 2020-12-24 | Yes |
| 840-465 | CHINO | 965H | 2021-07-07 | Yes |
| 840-466 | UPLAND | 516J | 2022-02-18 | Yes |
| 840-500 | BIGBEAR CY | 965H | 2022-01-27 | Yes |
| 840-511 | MULT | — | — | |
| 840-555 | DIR ASST | MULT | — | — |
| 840-587 | S BERNDINO | 965H | 2022-02-23 | Yes |
| 840-588 | DIAMONDBAR | 965H | 2021-10-28 | Yes |
| 840-600 | COLTON | 965H | 2021-01-04 | Yes |
| 840-611 | MULT | — | — | |
| 840-666 | FONTANA | 965H | 2020-12-24 | Yes |
| 840-677 | ETIWANDA | 965H | 2021-10-28 | Yes |
| 840-688 | CRESTLINE | 965H | 2021-10-25 | Yes |
| 840-699 | ONTARIO | 965H | 2021-07-16 | Yes |
| 840-700 | — | — | ||
| 840-711 | MULT | — | — | |
| 840-777 | POMONA | 145J | 2020-12-23 | Yes |
| 840-788 | FONTANA | 965H | 2021-07-16 | Yes |
| 840-799 | RIALTO | 965H | 2021-07-15 | Yes |
| 840-800 | UPLAND | 965H | 2020-12-24 | Yes |
| 840-804 | CLAREMONT | 649C | 2023-01-13 | Yes |
| 840-811 | MULT | — | — | |
| 840-837 | POMONA | 516J | 2022-01-10 | Yes |
| 840-840 | ONTARIO | 624H | 2025-09-16 | Yes |
| 840-877 | MARSHALL | 965H | 2021-07-15 | Yes |
| 840-888 | REDLANDS | 145J | 2020-12-23 | Yes |
| 840-899 | HIGHLAND | 965H | 2021-07-15 | Yes |
| 840-900 | RIALTO | 965H | 2020-12-24 | Yes |
| 840-911 | MULT | — | — | |
| 840-950 | — | — | ||
| 840-958 | — | — | ||
| 840-959 | — | — | ||
| 840-976 | — | — | ||
| 840-977 | CLAREMONT | 965H | 2021-07-15 | Yes |
| 840-996 | S BERNDINO | 6010 | 2026-05-20 | Yes |
| 840-997 | CLAREMONT | 649C | 2026-05-06 | Yes |
| 840-998 | HIGHLAND | 6006 | 2026-01-16 | Yes |
| 840-999 | UPLAND | 145J | 2020-12-23 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.