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 |
|---|---|---|---|---|---|---|
| — | 718-223 | 0XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN07 | NY |
| — | 718-305 | 1XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN15 | NY |
| — | 718-414 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN04 | NY |
| — | 718-440 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN08 | NY |
| — | 718-509 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN05 | NY |
| — | 718-552 | 0XXX1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN06 | NY |
| — | 718-577 | 0XXX1XXX2XXX5XXX7XXX8XXX · 3 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN10 | NY |
| — | 718-598 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN12 | NY |
| — | 718-606 | 3XXX4XXX5XXX7XXX · 3 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN08 | NY |
| — | 718-873 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN14 | NY |
| — | 718-878 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | RCN TELECOM SERVICES, INC. - NY | 7353 | NWYRCYZN09 | NY |
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.