NumberResearchThousands-blocks in 323-318
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 323-318 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 323 blocks
Most active assignees, all time — NPA 323
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-03-22 | 323-318-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 05 | CA |
| — | 323-318-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | LSAN DA 05 | CA |
| 2005-07-29 | 323-318-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LSAN DA 05 | CA |
| 2015-03-26 | 323-318-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | LSAN DA 05 | CA |
| 2005-08-03 | 323-318-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LSAN DA 05 | CA |
| 2024-05-28 | 323-318-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LSAN DA 05 | CA |
| 2005-08-18 | 323-318-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LSAN DA 05 | CA |
| 2005-08-18 | 323-318-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LSAN DA 05 | CA |
| — | 323-318-8XXX | 8000–8999 | Reserved | PAETEC ITEL, LLC | 829J | LSAN DA 05 | CA |
| — | 323-318-9XXX | 9000–9999 | Reserved | PAETEC ITEL, LLC | 829J | LSAN DA 05 | 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.