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 213
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-11-25 | 213-546-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 06 | CA |
| 2017-05-10 | 213-310-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 01 | CA |
| 2016-12-13 | 213-246-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 01 | CA |
| 2015-08-17 | 213-358-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 01 | CA |
| 2015-02-18 | 213-699-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 07 | CA |
| 2014-07-21 | 213-426-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LSAN DA 01 | CA |
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.