NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026
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 570
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-02-04 | 570-769-8XXX | 8000–8999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | WOOLRICH | PA |
| 2010-04-05 | 570-505-0XXX | 0000–0999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | WILLIAMSPT | PA |
| 2005-03-15 | 570-428-7XXX | 7000–7999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | MILTON | PA |
| 2005-03-11 | 570-863-5XXX | 5000–5999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | SUNBURY | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.