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 |
|---|---|---|---|---|---|---|
| 2023-12-08 | 272-371 | 0XXX1XXX9XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | NANTICOKE | PA |
| 2023-12-08 | 272-374 | 1XXX which blocks → | IP HORIZON LLC | 515J | PLYMOUTH | PA |
| 2023-12-08 | 272-375 | 1XXX which blocks → | IP HORIZON LLC | 515J | PINE GROVE | PA |
| 2023-12-08 | 272-376 | 1XXX which blocks → | IP HORIZON LLC | 515J | RENOVO | PA |
| 2023-12-08 | 272-378 | 1XXX2XXX3XXX · 3 holders which blocks → | IP HORIZON LLC | 515J | SHENANDOAH | PA |
| 2023-12-08 | 272-379 | 0–9 XXXall 10 · 4 holders which blocks → | IP HORIZON LLC | 515J | WILKSBARRE | PA |
| 2023-12-07 | 272-361 | 1XXX which blocks → | IP HORIZON LLC | 515J | MAHANOY CY | PA |
| 2023-12-07 | 272-362 | 0XXX1XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | MANTZVILLE | PA |
| 2023-12-07 | 272-363 | 1XXX8XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | MIDDLEBURG | PA |
| 2023-12-07 | 272-364 | 1XXX6XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | HAWLEY | PA |
| 2023-12-07 | 272-365 | 0XXX1XXX2XXX3XXX · 4 holders which blocks → | IP HORIZON LLC | 515J | DANVILLE | PA |
| 2023-12-07 | 272-366 | 1XXX3XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | CATAWISSA | PA |
| 2023-12-07 | 272-367 | 0–9 XXXall 10 · 3 holders which blocks → | IP HORIZON LLC | 515J | CARBONDALE | PA |
| 2023-12-07 | 272-368 | 0XXX1XXX8XXX9XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | MT CARMEL | PA |
| 2023-12-07 | 272-369 | 1XXX6XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | LAKE ARIEL | PA |
| 2023-12-07 | 272-370 | 0XXX1XXX · 2 holders which blocks → | IP HORIZON LLC | 515J | BEAVER SPG | PA |
| 2021-01-28 | 272-250 | 0–9 XXXall 10 · 5 holders which blocks → | IP HORIZON LLC | 515J | SCRANTON | PA |
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.