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 |
|---|---|---|---|---|---|---|
| — | 830-985 | 5XXX6XXX7XXX8XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | LACOSTE | TX |
| — | 830-988 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | SOUTHWESTERN BELL | 9533 | SABINAL | TX |
| — | 830-990 | not yet reported which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | FREDECKSBG | TX |
| — | 830-992 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | FREDECKSBG | TX |
| — | 830-995 | none assigned yet which blocks → | HILL COUNTRY TEL. COOP., INC. | 2086 | COMFORT | TX |
| — | 830-996 | 7XXX8XXX9XXX · 3 holders which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | STOCKDALE | TX |
| — | 830-997 | not yet reported which blocks → | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | FREDECKSBG | TX |
| — | 830-998 | 3XXX6XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FREDECKSBG | TX |
| — | 830-999 | 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | CATARINA | TX |
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.