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 |
|---|---|---|---|---|---|---|
| 2025-02-10 | 325-384 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | WINTERS | TX |
| 2025-02-10 | 325-385 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | ZEPHYR | TX |
| 2025-02-05 | 325-209 | 1XXX2XXX7XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | ALBANY | TX |
| 2025-02-05 | 325-360 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | BRONTE | TX |
| 2025-02-05 | 325-362 | 1XXX2XXX7XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | BANGS | TX |
| 2025-02-05 | 325-364 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | BARNHART | TX |
| 2025-02-05 | 325-366 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | BLANKET | TX |
| 2025-02-05 | 325-367 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | CARLSBAD | TX |
| 2025-02-05 | 325-368 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | ROSCOE | TX |
| 2025-02-05 | 325-369 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | ELDORADO | TX |
| 2025-02-05 | 325-371 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | GOLDTHWAIT | TX |
| 2025-02-05 | 325-373 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | GUSTINE | TX |
| 2025-02-05 | 325-375 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | JUNCTION | TX |
| 2025-02-05 | 325-376 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | LK BROWNWD | TX |
| 2025-02-05 | 325-377 | 1XXX2XXX7XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | LONDON | TX |
| 2025-02-05 | 325-380 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | ROBY | TX |
| 2025-02-05 | 325-381 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | MENARD | TX |
| 2025-02-05 | 325-383 | 1XXX2XXX which blocks → | IP HORIZON LLC | 515J | MERTZON | TX |
| 2020-09-28 | 325-289 | 0–9 XXXall 10 · 5 holders which blocks → | IP HORIZON LLC | 515J | ABILENE | TX |
| 2020-09-17 | 325-287 | 1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | SAN ANGELO | TX |
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.