NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 301
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-10-23 | 301-278-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | WSHNGTNZN5 | MD |
| 2003-10-23 | 301-685-8XXX | 8000–8999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | DAMASCS236 | MD |
| 2003-10-23 | 301-769-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | LEONARDTN | MD |
| 2003-10-23 | 301-803-5XXX | 5000–5999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | WSHNGTNZN2 | MD |
| 2003-10-23 | 301-885-4XXX | 4000–4999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | WALDORF | MD |
| 2003-10-23 | 301-994-5XXX | 5000–5999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | LXTNPKGRML | MD |
| 2003-10-16 | 301-525-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | GAITHERSBG | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.