NumberResearchThousands-blocks in 925-554
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 925-554 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 925 blocks
Most active assignees, last 30 days — NPA 925
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-01-29 | 925-554-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ANTIOCH | CA |
| 2026-02-18 | 925-554-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | ANTIOCH | CA |
| 2026-03-18 | 925-554-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2026-03-18 | 925-554-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2026-03-18 | 925-554-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2026-01-06 | 925-554-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| — | 925-554-6XXX | 6000–6999 | Assigned (pending) | ANTIOCH | CA | ||
| 2026-09-15 | 925-554-7XXX | 7000–7999 | Assigned | OPENTACT INC. | 824J | ANTIOCH | CA |
| — | 925-554-8XXX | 8000–8999 | Assigned (pending) | ANTIOCH | CA | ||
| 2026-01-06 | 925-554-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
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.