NumberResearchThousands-blocks in 410-831
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 410-831 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-10-28 | 410-831-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | SALISBURY | MD |
| 2015-10-28 | 410-831-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | SALISBURY | MD |
| 2015-06-08 | 410-831-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SALISBURY | MD |
| 2014-09-22 | 410-831-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | SALISBURY | MD |
| 2014-10-01 | 410-831-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | SALISBURY | MD |
| 2014-10-01 | 410-831-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SALISBURY | MD |
| 2012-06-21 | 410-831-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | SALISBURY | MD |
| 2015-10-22 | 410-831-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SALISBURY | MD |
| 2014-10-13 | 410-831-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | SALISBURY | MD |
| 2014-10-13 | 410-831-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | SALISBURY | 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.