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 |
|---|---|---|---|---|---|---|
| 2021-10-19 | 581-210 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Black Lake | — |
| 2021-10-19 | 581-413 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Leeds | — |
| 2021-10-19 | 581-414 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | East Broughton | — |
| 2021-10-19 | 581-415 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | St-Methode-de-Frontenac | — |
| 2021-10-19 | 581-416 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Tring Jonction | — |
| 2021-10-19 | 581-417 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Stratford | — |
| 2016-12-23 | 581-405 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | La Guadeloupe | — |
| 2011-10-17 | 581-208 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | St-Ferdinand-D'Halifax | — |
| 2011-10-17 | 581-209 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Disraeli | — |
| 2008-06-26 | 581-228 | not yet reported which blocks → | IVIC Telecom s.e.n.c | 817D | Garthby | — |
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.