NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 475
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-26 | 475-509-0XXX | 0000–0999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | GREENWICH | CT |
| 2025-10-14 | 475-397-0XXX | 0000–0999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | NORWALK | CT |
| 2021-03-02 | 475-278-3XXX | 3000–3999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | GREENWICH | CT |
| 2020-06-03 | 475-272-9XXX | 9000–9999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | FAIRFIELD | CT |
| 2018-09-20 | 475-252-6XXX | 6000–6999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | BYRAM | CT |
| 2018-04-03 | 475-359-6XXX | 6000–6999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | STAMFORD | CT |
| 2016-04-04 | 475-245-6XXX | 6000–6999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | NORWALK | CT |
| 2014-09-12 | 475-223-4XXX | 4000–4999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | ANSONIDRBY | CT |
| 2014-09-11 | 475-328-5XXX | 5000–5999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | DARIEN | CT |
| 2013-11-15 | 475-999-3XXX | 3000–3999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | FAIRFIELD | CT |
| 2013-05-23 | 475-282-7XXX | 7000–7999 | Assigned | CABLEVISION LIGHTPATH, INC. - CT | 4950 | BRIDGEPORT | CT |
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.