NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026
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 805
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-10-05 | 805-883-2XXX | 2000–2999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANBARBARA | CA |
| 2017-09-29 | 805-554-3XXX | 3000–3999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2011-04-04 | 805-335-9XXX | 9000–9999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANBARBARA | CA |
| 2008-01-28 | 805-287-1XXX | 1000–1999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-2XXX | 2000–2999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-3XXX | 3000–3999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-4XXX | 4000–4999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-5XXX | 5000–5999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-6XXX | 6000–6999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2008-01-28 | 805-287-7XXX | 7000–7999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SANTAMARIA | CA |
| 2007-07-19 | 805-419-7XXX | 7000–7999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | CAMARILLO | CA |
| 2006-11-30 | 805-437-0XXX | 0000–0999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | CAMARILLO | CA |
| 2004-08-27 | 805-742-2XXX | 2000–2999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | LOMPOC | CA |
| 2004-08-27 | 805-742-3XXX | 3000–3999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | LOMPOC | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.