NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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 |
|---|---|---|---|---|---|---|
| — | 315-858 | 3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | RICHFLDSPG | NY |
| — | 315-859 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | CLINTON | NY |
| — | 315-866 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | HERKIMER | NY |
| — | 315-867 | 6XXX which blocks → | VERIZON NEW YORK, INC. | 9104 | HERKIMER | NY |
| — | 315-889 | 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | UNION SPG | NY |
| — | 315-890 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | WADDINGTON | NY |
| — | 315-894 | 1XXX6XXX7XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | ILION | NY |
| — | 315-895 | 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | ILION | NY |
| — | 315-896 | 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | BARNEVELD | NY |
| — | 315-910 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | XXXXXXXXXX | NY |
| — | 315-923 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | CLYDE | NY |
| — | 315-926 | 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | MARION | NY |
| — | 315-946 | 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | LYONS | NY |
| — | 315-963 | 1XXX2XXX6XXX9XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | MEXICO | NY |
| — | 315-966 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | MACEDON | NY |
| — | 315-986 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | MACEDON | NY |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.