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 734
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-02-27 | 734-881-1XXX | 1000–1999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | ANN ARBOR | MI |
| 2010-10-18 | 734-391-3XXX | 3000–3999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | BELLEVILLE | MI |
| 2006-08-07 | 734-217-3XXX | 3000–3999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | YPSILANTI | MI |
| 2006-08-07 | 734-225-9XXX | 9000–9999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | WYANDOTTE | MI |
| 2006-08-07 | 734-233-6XXX | 6000–6999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | PLYMOUTH | MI |
| 2006-08-07 | 734-237-5XXX | 5000–5999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | LIVONIA | MI |
| 2006-08-07 | 734-239-8XXX | 8000–8999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | ANN ARBOR | MI |
| 2006-08-07 | 734-398-4XXX | 4000–4999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | WAYNE | MI |
| 2006-08-07 | 734-413-2XXX | 2000–2999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | ROMULUS | MI |
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.