NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2026-08-04 | 605-617 | 7XXX8XXX9XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HILL CITY | SD |
| 2025-11-12 | 605-508 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | RAPID CITY | SD |
| 2025-08-28 | 605-602 | 0XXX1XXX9XXX · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WATERTOWN | SD |
| 2025-03-03 | 605-974 | 0–9 XXXall 10 · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | RAPID CITY | SD |
| 2021-04-15 | 605-418 | 0–9 XXXall 10 · 4 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | ABERDEEN | SD |
| 2021-01-15 | 605-736 | 0–9 XXXall 10 · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | BROOKINGS | SD |
| 2019-10-29 | 605-981 | 0–9 XXXall 10 · 4 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | RAPID CITY | SD |
| 2017-01-26 | 605-872 | 0–9 XXXall 10 · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | RAPID CITY | SD |
| 2016-04-25 | 605-671 | 7XXX8XXX9XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | COLTON | SD |
| 2016-04-25 | 605-953 | 6XXX7XXX8XXX9XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HARTFORD | SD |
| 2016-04-25 | 605-963 | 2XXX3XXX6XXX7XXX9XXX · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | DELLRAPIDS | SD |
| 2009-12-19 | 605-215 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | SIOUX FLS | SD |
| 2001-09-26 | 605-521 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | SIOUX FLS | SD |
| — | 605-231 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | SIOUX FLS | SD |
| — | 605-376 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | SIOUX FLS | SD |
| — | 605-675 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | VERMILLION | SD |
| — | 605-691 | 0XXX2XXX6XXX · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | BROOKINGS | SD |
| — | 605-728 | not yet reported which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | SIOUX FLS | SD |
| — | 605-868 | 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WATERTOWN | SD |
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.