NumberResearchRecent prefix assignments
1 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 |
|---|---|---|---|---|---|---|
| — | 509-531 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PASCO | WA |
| — | 509-539 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PASCO | WA |
| — | 509-631 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COULEE DAM | WA |
| — | 509-641 | 2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WILBUR | WA |
| — | 509-660 | 1XXX2XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RITZVILLE | WA |
| — | 509-668 | 3XXX6XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WENATCHEE | WA |
| — | 509-669 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WENATCHEE | WA |
| — | 509-675 | 7XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COLVILLE | WA |
| — | 509-681 | 1XXX2XXX3XXX7XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COULEECITY | WA |
| — | 509-721 | 3XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DAVENPORT | WA |
| — | 509-733 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BREWSTER | WA |
| — | 509-750 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOSES LAKE | WA |
| — | 509-760 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOSES LAKE | WA |
| — | 509-781 | 3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PROSSER | WA |
| — | 509-840 | 6XXX7XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUNNYSIDE | WA |
| — | 509-863 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
| — | 509-899 | 6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELLENSBURG | WA |
| — | 509-952 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YAKIMA | WA |
| — | 509-961 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YAKIMA | WA |
| — | 509-969 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | YAKIMA | WA |
| — | 509-979 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
| — | 509-981 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
| — | 509-988 | 1XXX3XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ODESSA | WA |
| — | 509-989 | 8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOSES LAKE | WA |
| — | 509-990 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
| — | 509-994 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
| — | 509-995 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SPOKANE | WA |
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.