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 517
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-07-16 | 517-816-6XXX | 6000–6999 | Assigned | TELNET WORLDWIDE, INC. | 817J | LANSING | MI |
| 2010-10-26 | 517-492-8XXX | 8000–8999 | Assigned | TELNET WORLDWIDE, INC. | 817J | LANSING | MI |
| 2005-08-03 | 517-219-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | FOWLERVL | MI |
| 2005-08-03 | 517-233-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | EATON RPD | MI |
| 2005-08-03 | 517-431-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | TIPTON | MI |
| 2005-08-03 | 517-456-3XXX | 3000–3999 | Assigned | TELNET WORLDWIDE, INC. | 817J | CLINTON | MI |
| 2005-08-03 | 517-458-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | MORENCI | MI |
| 2005-08-03 | 517-522-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | GRASS LAKE | MI |
| 2005-08-03 | 517-529-6XXX | 6000–6999 | Assigned | TELNET WORLDWIDE, INC. | 817J | CLARKLAKE | MI |
| 2005-08-03 | 517-536-2XXX | 2000–2999 | Assigned | TELNET WORLDWIDE, INC. | 817J | NAPOLEON | MI |
| 2005-08-03 | 517-626-3XXX | 3000–3999 | Assigned | TELNET WORLDWIDE, INC. | 817J | GRANDLEDGE | MI |
| 2005-08-03 | 517-641-0XXX | 0000–0999 | Assigned | TELNET WORLDWIDE, INC. | 817J | BATH | MI |
| 2005-08-03 | 517-651-4XXX | 4000–4999 | Assigned | TELNET WORLDWIDE, INC. | 817J | LAINGSBURG | MI |
| 2005-08-03 | 517-668-4XXX | 4000–4999 | Assigned | TELNET WORLDWIDE, INC. | 817J | DE WITT | MI |
| 2005-08-03 | 517-833-1XXX | 1000–1999 | Assigned | TELNET WORLDWIDE, INC. | 817J | MASON | MI |
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.