NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 304
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-10-28 | 304-521-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | HNTNGTNZN1 | WV |
| 2002-10-28 | 304-579-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | MARTINSBG | WV |
| 2002-10-28 | 304-699-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | PRKRSBGZN1 | WV |
| 2002-10-28 | 304-721-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | CHRLSTNZN5 | WV |
| 2002-10-28 | 304-949-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | CHRLSTNZN4 | WV |
| 2002-10-22 | 304-489-4XXX | 4000–4999 | Assigned | FRONTIER WEST VIRGINIA INC. | 9214 | MINERLWLLS | WV |
| 2002-10-22 | 304-579-2XXX | 2000–2999 | Assigned | FRONTIER WEST VIRGINIA INC. | 9214 | MARTINSBG | WV |
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.