NumberResearchThousands-blocks in 315-503
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 315-503 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
Sep 2026
Aug 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-05-04 | 315-503-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | MINOA | NY |
| 2008-12-29 | 315-503-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | MINOA | NY |
| 2005-07-05 | 315-503-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | MINOA | NY |
| 2010-07-02 | 315-503-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MINOA | NY |
| 2010-08-16 | 315-503-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | MINOA | NY |
| 2012-04-20 | 315-503-5XXX | 5000–5999 | Assigned | ONVOY, LLC- NY | 384C | MINOA | NY |
| 2012-12-21 | 315-503-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | MINOA | NY |
| 2012-09-25 | 315-503-7XXX | 7000–7999 | Assigned | ONVOY, LLC- NY | 384C | MINOA | NY |
| 2015-01-26 | 315-503-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | MINOA | NY |
| 2018-08-13 | 315-503-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | MINOA | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.