NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 717
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-09-15 | 717-227-6XXX | 6000–6999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | GLEN ROCK | PA |
| 2008-09-15 | 717-373-0XXX | 0000–0999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | BROGUE | PA |
| 2008-09-15 | 717-382-2XXX | 2000–2999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | FAWN GROVE | PA |
| 2008-09-15 | 717-429-4XXX | 4000–4999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | DELTA | PA |
| 2008-09-15 | 717-746-4XXX | 4000–4999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | STEWARTSTN | PA |
| 2008-09-09 | 717-322-3XXX | 3000–3999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | AIRVILLE | PA |
| 2008-08-15 | 717-501-0XXX | 0000–0999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | RED LION | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.