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 |
|---|---|---|---|---|---|---|
| 2023-08-08 | 914-678 | 0–9 XXXall 10 · 3 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN07 | NY |
| 2001-05-22 | 914-556 | 0–9 XXXall 10 · 9 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | BIRCHWOOD | NY |
| 2001-01-10 | 914-620 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN02 | NY |
| — | 914-214 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | YORKTN HTS | NY |
| — | 914-218 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | MOUNTKISCO | NY |
| — | 914-219 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | ARMONK VLG | NY |
| — | 914-301 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | KATONAH | NY |
| — | 914-304 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-305 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN09 | NY |
| — | 914-323 | 8XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-371 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | MT VERNON | NY |
| — | 914-409 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN04 | NY |
| — | 914-467 | 0XXX8XXX9XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-495 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | PLEASANTVL | NY |
| — | 914-539 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-597 | 0XXX1XXX3XXX7XXX9XXX · 3 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-606 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN07 | NY |
| — | 914-609 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN08 | NY |
| — | 914-617 | 1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | CROTON FLS | NY |
| — | 914-740 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN03 | NY |
| — | 914-751 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN01 | NY |
| — | 914-820 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | TC SYSTEMS, INC. - NY | 7140 | WSCHSTZN06 | 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.