NumberResearchRecent thousands-block assignments
1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 323
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2001-11-15 | 323-521-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | LSAN DA 08 | CA |
| 2001-11-15 | 323-541-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LSAN DA 09 | CA |
| 2001-10-12 | 323-923-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 06 | CA |
| 2001-10-10 | 323-201-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MONTEBELLO | CA |
| 2001-10-10 | 323-638-8XXX | 8000–8999 | Assigned | CURATEL, LLC - CA | 993B | LSAN DA 06 | CA |
| 2001-09-07 | 323-442-0XXX | 0000–0999 | Assigned | FRONTIER CALIFORNIA INC. | 7534 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-1XXX | 1000–1999 | Assigned | FRONTIER CALIFORNIA INC. | 7534 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-2XXX | 2000–2999 | Assigned | FRONTIER CALIFORNIA INC. | 7534 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-6XXX | 6000–6999 | Assigned | FRONTIER CALIFORNIA INC. | 7534 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-7XXX | 7000–7999 | Assigned | FRONTIER CALIFORNIA INC. | 7534 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 04 | CA |
| 2001-09-07 | 323-865-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 04 | 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.