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 810
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-04-11 | 810-335-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | ALGONAC | MI |
| 2016-01-26 | 810-714-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | FENTON | MI |
| 2011-07-07 | 810-294-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | PORT HURON | MI |
| 2010-03-24 | 810-487-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | FLUSHING | MI |
| 2010-03-10 | 810-355-9XXX | 9000–9999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | BRIGHTON | MI |
| 2009-05-15 | 810-584-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | GRANDBLANC | MI |
| 2008-09-03 | 810-410-0XXX | 0000–0999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | FLINT | 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.