NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 858
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-02-17 | 858-729-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LA JOLLA | CA |
| 2026-02-17 | 858-762-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POWAY | CA |
| 2025-10-07 | 858-925-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DEL MAR | CA |
| 2025-09-15 | 858-860-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SNDG MRMS | CA |
| 2025-04-17 | 858-376-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RNCHOBRNDO | CA |
| 2025-01-15 | 858-206-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POWAY | CA |
| 2025-01-15 | 858-768-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LA JOLLA | CA |
| 2024-11-27 | 858-384-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SNDG LVTA | CA |
| 2024-05-29 | 858-754-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LA JOLLA | CA |
| 2023-05-25 | 858-208-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POWAY | CA |
| 2021-09-07 | 858-883-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POWAY | CA |
| 2020-12-15 | 858-733-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RNCHOPNQTS | CA |
| 2020-12-08 | 858-883-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POWAY | CA |
| 2019-04-04 | 858-247-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LA JOLLA | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.