NumberResearchRecent thousands-block assignments
5 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, last 30 days — NPA 717
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-06-26 | 717-609-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | CARLISLE | PA |
| 2002-06-26 | 717-759-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | GLEN ROCK | PA |
| 2002-06-26 | 717-779-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | YORK | PA |
| 2002-06-26 | 717-967-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | MT GRETNA | PA |
| 2002-06-14 | 717-773-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | HARISBGZN1 | PA |
| 2002-06-11 | 717-868-5XXX | 5000–5999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | ANNVILLE | PA |
| 2002-05-17 | 717-358-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | LANCASTER | PA |
| 2002-05-17 | 717-358-9XXX | 9000–9999 | Assigned | CTSI, INC. - PA | 7513 | LANCASTER | PA |
| 2002-05-17 | 717-381-2XXX | 2000–2999 | Assigned | CTSI, INC. - PA | 7513 | LANCASTER | PA |
| 2002-05-17 | 717-381-3XXX | 3000–3999 | Assigned | CTSI, INC. - PA | 7513 | LANCASTER | PA |
| 2002-05-17 | 717-381-4XXX | 4000–4999 | Assigned | CTSI, INC. - PA | 7513 | LANCASTER | PA |
| 2002-04-10 | 717-202-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | LEBANON | PA |
| 2002-04-10 | 717-458-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | MECHANCSBG | 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.