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 231
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-06-17 | 231-404-5XXX | 5000–5999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | STANWOOD | MI |
| 2014-06-17 | 231-660-9XXX | 9000–9999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | BIG RAPIDS | MI |
| 2014-06-17 | 231-791-5XXX | 5000–5999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | REED CITY | MI |
| 2014-06-17 | 231-803-1XXX | 1000–1999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | MORLEY | MI |
| 2014-06-17 | 231-937-1XXX | 1000–1999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | HOWARDCITY | MI |
| 2007-04-02 | 231-425-5XXX | 5000–5999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | LUDINGTON | MI |
| 2007-04-02 | 231-923-5XXX | 5000–5999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | HART | MI |
| 2006-10-13 | 231-241-0XXX | 0000–0999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | PENTWATER | 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.