NumberResearchThousands-blocks in 515-405
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 515-405 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 515 blocks
Most active assignees, all time — NPA 515
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-05-05 | 515-405-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | RENWICK | IA |
| 2025-07-22 | 515-405-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RENWICK | IA |
| — | 515-405-2XXX | 2000–2999 | Available | RENWICK | IA | ||
| — | 515-405-3XXX | 3000–3999 | Available | RENWICK | IA | ||
| 2020-10-21 | 515-405-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IA | 221F | RENWICK | IA |
| 2024-11-19 | 515-405-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RENWICK | IA |
| — | 515-405-6XXX | 6000–6999 | Available | RENWICK | IA | ||
| 2022-12-15 | 515-405-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | RENWICK | IA |
| — | 515-405-8XXX | 8000–8999 | Available | RENWICK | IA | ||
| 2019-11-26 | 515-405-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | RENWICK | IA |
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.