NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| — | 870-496 | 3XXX5XXX · 2 holders which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | WITTS SPG | AR |
| — | 870-545 | 1XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | RUDD | AR |
| — | 870-567 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | CROSSETT | AR |
| — | 870-582 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | DE QUEEN | AR |
| — | 870-583 | 9XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | UMPIRE | AR |
| — | 870-584 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | DE QUEEN | AR |
| — | 870-642 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | DE QUEEN | AR |
| — | 870-678 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | SPARKMAN | AR |
| — | 870-687 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | BEARDEN | AR |
| — | 870-699 | 7XXX8XXX9XXX · 2 holders which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | PRATTSVL | AR |
| — | 870-704 | 0XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | HARRISON | AR |
| — | 870-715 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | HARRISON | AR |
| — | 870-741 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | HARRISON | AR |
| — | 870-743 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | HARRISON | AR |
| — | 870-749 | 1XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | OAK GROVE | AR |
| — | 870-765 | 9XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | LEOLA | AR |
| — | 870-827 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | ELAINE | AR |
| — | 870-832 | 7XXX8XXX · 2 holders which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | HORATIO | AR |
| — | 870-867 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | MOUNT IDA | AR |
| — | 870-917 | none assigned yet which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | SHERIDAN | AR |
| — | 870-941 | 0XXX8XXX9XXX which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | SHERIDAN | AR |
| — | 870-942 | not yet reported which blocks → | WINDSTREAM ARKANSAS, INC. | 1691 | SHERIDAN | AR |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.