NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2019-11-15 | 213-750 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 11 | CA |
| 2019-11-15 | 213-780 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 12 | CA |
| 2019-11-15 | 213-790 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 13 | CA |
| 2019-11-15 | 213-850 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 14 | CA |
| 2019-11-12 | 213-450 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 02 | CA |
| 2019-11-12 | 213-490 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 03 | CA |
| 2019-11-12 | 213-525 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 04 | CA |
| 2019-11-12 | 213-530 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 05 | CA |
| 2019-11-12 | 213-535 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 06 | CA |
| 2019-11-12 | 213-540 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 07 | CA |
| 2019-11-12 | 213-560 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 08 | CA |
| 2019-11-12 | 213-690 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 09 | CA |
| 2019-11-12 | 213-730 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 10 | CA |
| 2019-10-16 | 213-390 | not yet reported which blocks → | RIGHT CALL LLC | 365J | LSAN DA 01 | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.