NumberResearchThousands-blocks in 315-755
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 315-755 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 315 blocks
Most active assignees, all time — NPA 315
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-03-13 | 315-755-0XXX | 0000–0999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2003-03-13 | 315-755-1XXX | 1000–1999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2003-03-13 | 315-755-2XXX | 2000–2999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2003-03-13 | 315-755-3XXX | 3000–3999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2003-03-13 | 315-755-4XXX | 4000–4999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2011-03-02 | 315-755-5XXX | 5000–5999 | Assigned | YMAX COMMUNICATIONS CORP. - NY | 282E | WATERTOWN | NY |
| 2003-03-13 | 315-755-6XXX | 6000–6999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2003-03-13 | 315-755-7XXX | 7000–7999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
| 2013-06-19 | 315-755-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WATERTOWN | NY |
| 2003-03-13 | 315-755-9XXX | 9000–9999 | Assigned | WESTELCOM NETWORK, INC. - NY | 1227 | WATERTOWN | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.