NumberResearchThousands-blocks in 818-279
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 818-279 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 |
|---|---|---|---|---|---|---|---|
| — | 818-279-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | CA |
| 2002-11-08 | 818-279-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | LACRSCENTA | CA |
| — | 818-279-2XXX | 2000–2999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | CA |
| 2002-11-21 | 818-279-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | LACRSCENTA | CA |
| 2004-08-19 | 818-279-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LACRSCENTA | CA |
| 2004-12-09 | 818-279-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | LACRSCENTA | CA |
| — | 818-279-6XXX | 6000–6999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | CA |
| — | 818-279-7XXX | 7000–7999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | CA |
| 2002-01-08 | 818-279-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LACRSCENTA | CA |
| — | 818-279-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LACRSCENTA | 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.