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 |
|---|---|---|---|---|---|---|
| 2024-03-04 | 607-491 | 6XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | DRYDEN | NY |
| 2009-06-15 | 607-878 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WORCESTER | NY |
| — | 607-210 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WATKISGLEN | NY |
| — | 607-214 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | STAMFORD | NY |
| — | 607-223 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | OWEGO | NY |
| — | 607-233 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-242 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | BINGHAMTON | NY |
| — | 607-249 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WAVERLY | NY |
| — | 607-250 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | CORTLAND | NY |
| — | 607-251 | 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | BINGHAMTON | NY |
| — | 607-252 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-253 | not yet reported which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-255 | not yet reported which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-322 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | COOPERSTN | NY |
| — | 607-338 | 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | BINGHAMTON | NY |
| — | 607-342 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-375 | 0XXX1XXX3XXX7XXX8XXX · 3 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ITHACA | NY |
| — | 607-376 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ONEONTA | NY |
| — | 607-377 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | CORNING | NY |
| — | 607-378 | 3XXX7XXX8XXX9XXX · 3 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ELMIRA | NY |
| — | 607-590 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | HORNELL | NY |
| — | 607-621 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | BINGHAMTON | NY |
| — | 607-622 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | BATH | NY |
| — | 607-744 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ENDICOTT | NY |
| — | 607-751 | not yet reported which blocks → | TC SYSTEMS, INC. - NY | 7140 | OWEGO | 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.