NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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 |
|---|---|---|---|---|---|---|
| — | 631-859 | 2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | ISLIP | NY |
| — | 631-862 | 2XXX4XXX5XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | ST JAMES | NY |
| — | 631-863 | 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | SMITHTOWN | NY |
| — | 631-864 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | COMMACK | NY |
| — | 631-874 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | CTRMORICHS | NY |
| — | 631-878 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | CTRMORICHS | NY |
| — | 631-884 | 4XXX which blocks → | VERIZON NEW YORK, INC. | 9104 | LINDENHST | NY |
| — | 631-888 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | LINDENHST | NY |
| — | 631-890 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | PATCHOGUE | NY |
| — | 631-893 | 9XXX which blocks → | VERIZON NEW YORK, INC. | 9104 | BABYLON | NY |
| — | 631-898 | 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | WESTHAMPTN | NY |
| — | 631-904 | 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | CENTRAISLP | NY |
| — | 631-905 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | RIVERHEAD | NY |
| — | 631-907 | 2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | E HAMPTON | NY |
| — | 631-912 | 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | NORTHPORT | NY |
| — | 631-924 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | YAPHANK | NY |
| — | 631-928 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | PTJEFFERSN | NY |
| — | 631-929 | 2XXX7XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | WADING RIV | NY |
| — | 631-936 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | XXXXXXXXXX | NY |
| — | 631-941 | 6XXX7XXX8XXX · 3 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | STONYBROOK | NY |
| — | 631-951 | 7XXX8XXX which blocks → | VERIZON NEW YORK, INC. | 9104 | BRENTWOOD | NY |
| — | 631-952 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | BRENTWOOD | NY |
| — | 631-953 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | RIVERHEAD | NY |
| — | 631-955 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | DEER PARK | NY |
| — | 631-956 | 2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | LINDENHST | NY |
| — | 631-957 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | LINDENHST | NY |
| — | 631-968 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | BAY SHORE | NY |
| — | 631-969 | 4XXX6XXX · 2 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | BAY SHORE | NY |
| — | 631-979 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | SMITHTOWN | NY |
| — | 631-981 | not yet reported which blocks → | VERIZON NEW YORK, INC. | 9104 | RONKONKOMA | NY |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.