NumberResearchThousands-blocks in 818-271
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 818-271 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-01-06 | 818-271-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFN GRHL | CA |
| 2002-11-07 | 818-271-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFN GRHL | CA |
| — | 818-271-2XXX | 2000–2999 | Reserved | FRONTIER CALIFORNIA INC. | 2319 | SNFN GRHL | CA |
| 2005-08-10 | 818-271-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNFN GRHL | CA |
| 2020-05-26 | 818-271-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNFN GRHL | CA |
| 2002-08-01 | 818-271-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNFN GRHL | CA |
| 2013-06-05 | 818-271-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNFN GRHL | CA |
| 2002-11-21 | 818-271-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFN GRHL | CA |
| 2002-11-21 | 818-271-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFN GRHL | CA |
| 2002-11-21 | 818-271-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNFN GRHL | 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.