NumberResearchThousands-blocks in 818-274
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 818-274 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 818 blocks
Most active assignees, all time — NPA 818
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 818-274-0XXX | 0000–0999 | Reserved | PACIFIC BELL | 9740 | CANOGAPARK | CA |
| 2004-04-27 | 818-274-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CANOGAPARK | CA |
| 2004-04-27 | 818-274-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CANOGAPARK | CA |
| 2022-11-15 | 818-274-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CANOGAPARK | CA |
| 2005-01-28 | 818-274-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CANOGAPARK | CA |
| 2004-08-31 | 818-274-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CANOGAPARK | CA |
| 2004-09-07 | 818-274-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CANOGAPARK | CA |
| 2004-10-04 | 818-274-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CANOGAPARK | CA |
| 2004-10-04 | 818-274-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CANOGAPARK | CA |
| 2004-05-04 | 818-274-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | CANOGAPARK | 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.