NumberResearchThousands-blocks in 410-670
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/21/2026
The ten 1,000-number thousand-blocks inside prefix 410-670 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 410 blocks
Most active assignees, all time — NPA 410
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-04-20 | 410-670-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MD | 876D | EDGEWOOD | MD |
| 2019-12-31 | 410-670-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | EDGEWOOD | MD |
| 2004-03-01 | 410-670-2XXX | 2000–2999 | Assigned | CORE COMMUNICATIONS, INC.- MD | 2593 | EDGEWOOD | MD |
| 2012-05-09 | 410-670-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | EDGEWOOD | MD |
| 2003-01-27 | 410-670-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | EDGEWOOD | MD |
| 2012-07-16 | 410-670-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | EDGEWOOD | MD |
| 2020-03-20 | 410-670-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | EDGEWOOD | MD |
| 2005-01-26 | 410-670-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | EDGEWOOD | MD |
| 2006-04-13 | 410-670-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | EDGEWOOD | MD |
| — | 410-670-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | EDGEWOOD | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.