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 410
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-01-04 | 410-525-7XXX | 7000–7999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | BALTIMORE | MD |
| 2016-01-04 | 410-696-6XXX | 6000–6999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | ELLICOTTCY | MD |
| 2003-10-22 | 410-346-4XXX | 4000–4999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | SILVER RUN | MD |
| 2003-10-22 | 410-441-7XXX | 7000–7999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | ELKTON | MD |
| 2003-10-22 | 410-452-4XXX | 4000–4999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | CARDIFF | MD |
| 2003-10-22 | 410-773-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | COCKEYSVL | MD |
| 2003-10-22 | 410-776-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | BEL AIR | MD |
| 2003-10-22 | 410-940-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | ANNAPOLIS | MD |
| 2003-10-22 | 410-946-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | SEVERNA PK | MD |
| 2003-10-22 | 410-970-8XXX | 8000–8999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | SYKESVILLE | MD |
| 2003-10-20 | 410-871-4XXX | 4000–4999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | WESTMINSTR | MD |
| 2003-10-15 | 410-982-0XXX | 0000–0999 | Assigned | QUANTUM TELECOMMUNICATIONS, INC. - MD | 2596 | BALTIMORE | 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.