NumberResearchRecent thousands-block assignments
12 blocks assigned in December 2025 · from the daily NANPA thousands-block report, 09/19/2026
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, December 2025 — NPA 458
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-12-19 | 458-353-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PILOT ROCK | OR |
| 2025-12-17 | 458-308-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PENDLETON | OR |
| 2025-12-17 | 458-308-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PENDLETON | OR |
| 2025-12-11 | 458-277-4XXX | 4000–4999 | Assigned | ONVOY, LLC - OR | 750E | NEWPORT | OR |
| 2025-12-10 | 458-276-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ONTARIO | OR |
| 2025-12-10 | 458-281-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2025-12-10 | 458-337-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ALBANY | OR |
| 2025-12-10 | 458-338-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2025-12-10 | 458-347-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ALBANY | OR |
| 2025-12-03 | 458-308-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PENDLETON | OR |
| 2025-12-03 | 458-308-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | PENDLETON | OR |
| 2025-12-03 | 458-359-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MILTONFWTR | OR |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.