NumberResearchThousands-blocks in 410-871
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 410-871 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 410-871-0XXX | 0000–0999 | Reserved | VERIZON MARYLAND, INC. | 9212 | WESTMINSTR | MD |
| — | 410-871-1XXX | 1000–1999 | Reserved | VERIZON MARYLAND, INC. | 9212 | WESTMINSTR | MD |
| — | 410-871-2XXX | 2000–2999 | Reserved | VERIZON MARYLAND, INC. | 9212 | WESTMINSTR | MD |
| — | 410-871-3XXX | 3000–3999 | Reserved | VERIZON MARYLAND, INC. | 9212 | WESTMINSTR | MD |
| 2003-10-20 | 410-871-4XXX | 4000–4999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | WESTMINSTR | MD |
| 2021-10-07 | 410-871-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WESTMINSTR | MD |
| — | 410-871-6XXX | 6000–6999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | WESTMINSTR | MD |
| — | 410-871-7XXX | 7000–7999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | WESTMINSTR | MD |
| 2010-01-26 | 410-871-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WESTMINSTR | MD |
| — | 410-871-9XXX | 9000–9999 | Reserved | VERIZON MARYLAND, INC. | 9212 | WESTMINSTR | 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.