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 |
|---|---|---|---|---|---|---|
| 2025-10-15 | 428-712 | not yet reported which blocks → | Iristel Inc. | 154E | St. George | — |
| 2025-05-01 | 428-724 | not yet reported which blocks → | Iristel Inc. | 154E | Shediac | — |
| 2023-06-20 | 428-526 | not yet reported which blocks → | Iristel Inc. | 154E | Harvey Station | — |
| 2023-06-20 | 428-910 | not yet reported which blocks → | Iristel Inc. | 154E | Saint John | — |
| 2023-06-08 | 428-308 | not yet reported which blocks → | Iristel Inc. | 154E | Miramichi | — |
| 2023-06-08 | 428-404 | not yet reported which blocks → | Iristel Inc. | 154E | Richibucto | — |
| 2023-06-08 | 428-496 | not yet reported which blocks → | Iristel Inc. | 154E | Bathurst | — |
| 2023-06-08 | 428-699 | not yet reported which blocks → | Iristel Inc. | 154E | Shippagan | — |
| 2023-06-08 | 428-707 | not yet reported which blocks → | Iristel Inc. | 154E | Perth-Andover | — |
| 2023-06-08 | 428-710 | not yet reported which blocks → | Iristel Inc. | 154E | Sackville | — |
| 2023-06-08 | 428-713 | not yet reported which blocks → | Iristel Inc. | 154E | St. George | — |
| 2023-06-08 | 428-714 | not yet reported which blocks → | Iristel Inc. | 154E | St. Stephen | — |
| 2023-06-08 | 428-723 | not yet reported which blocks → | Iristel Inc. | 154E | Shediac | — |
| 2023-06-08 | 428-789 | not yet reported which blocks → | Iristel Inc. | 154E | Petitcodiac | — |
| 2023-06-07 | 428-436 | not yet reported which blocks → | Iristel Inc. | 154E | Bouctouche | — |
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.