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 |
|---|---|---|---|---|---|---|
| 2014-11-07 | 317-689 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | CARMEL | IN |
| 2008-04-15 | 317-957 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| 2006-01-26 | 317-660 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | CARMEL | IN |
| 2001-10-12 | 317-451 | 1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | DANVILLE | IN |
| 2001-10-12 | 317-565 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | NOBLESVL | IN |
| 2001-06-15 | 317-537 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | FISHERS | IN |
| 2001-05-22 | 317-399 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | WESTFIELD | IN |
| — | 317-223 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-230 | not yet reported which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-275 | not yet reported which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-344 | 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | ZIONSVILLE | IN |
| — | 317-395 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | SHELBYVL | IN |
| — | 317-455 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | WESTNEWTON | IN |
| — | 317-524 | 8XXX9XXX which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-669 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | CARMEL | IN |
| — | 317-707 | 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | PLAINFIELD | IN |
| — | 317-713 | not yet reported which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-715 | not yet reported which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-805 | not yet reported which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | CARMEL | IN |
| — | 317-806 | 9XXX which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | FISHERS | IN |
| — | 317-833 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | INDIANAPLS | IN |
| — | 317-893 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | GREENWOOD | IN |
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.