NumberResearchThousands-blocks in 410-517
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 410-517 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 410-517-0XXX | 0000–0999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| — | 410-517-1XXX | 1000–1999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| — | 410-517-2XXX | 2000–2999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| — | 410-517-3XXX | 3000–3999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| 2006-06-14 | 410-517-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | REISTERSTN | MD |
| — | 410-517-5XXX | 5000–5999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| 2003-10-17 | 410-517-6XXX | 6000–6999 | Assigned | VDL, INC. DBA GLOBAL TELECOM BROKERS - MD | 4492 | REISTERSTN | MD |
| 2016-02-23 | 410-517-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | REISTERSTN | MD |
| — | 410-517-8XXX | 8000–8999 | Reserved | VERIZON MARYLAND, INC. | 9212 | REISTERSTN | MD |
| 2006-04-05 | 410-517-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | REISTERSTN | MD |
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.