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
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-04-27 | 734-466-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIVONIA | MI |
| 2016-03-21 | 734-351-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAYNE | MI |
| 2014-10-29 | 734-324-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WYANDOTTE | MI |
| 2014-08-04 | 734-582-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PLYMOUTH | MI |
| 2012-02-08 | 734-589-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAYNE | MI |
| 2011-11-16 | 734-333-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WHITMORELK | MI |
| 2011-08-30 | 734-997-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ANN ARBOR | MI |
| 2011-06-30 | 734-219-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | YPSILANTI | MI |
| 2011-06-27 | 734-743-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIVONIA | MI |
| 2010-01-22 | 734-315-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NEW BOSTON | MI |
| 2006-02-06 | 734-258-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WYANDOTTE | MI |
| 2006-02-06 | 734-270-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLIS | MI |
| 2006-02-06 | 734-344-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MONROE | MI |
| 2006-02-06 | 734-392-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PLYMOUTH | MI |
| 2006-02-06 | 734-441-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROCKWOOD | MI |
| 2006-02-06 | 734-442-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROMULUS | MI |
| 2006-02-06 | 734-508-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MILAN | MI |
| 2006-02-06 | 734-672-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TRENTON | MI |
| 2006-02-06 | 734-858-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WAYNE | MI |
| 2006-02-06 | 734-905-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | YPSILANTI | MI |
| 2006-02-06 | 734-970-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PINCKNEY | MI |
| 2006-02-02 | 734-388-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DEXTER | MI |
| 2006-02-02 | 734-391-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BELLEVILLE | MI |
| 2006-02-02 | 734-396-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MANCHESTER | MI |
| 2006-02-02 | 734-506-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CARLETON | MI |
| 2006-02-02 | 734-593-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHELSEA | MI |
| 2006-02-02 | 734-744-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LIVONIA | MI |
| 2006-02-02 | 734-780-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ANN ARBOR | MI |
| 2006-02-02 | 734-795-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FLAT ROCK | 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.