NumberResearchRecent thousands-block assignments
0 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, all time — NPA 515
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-07-23 | 515-873-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | INDIANOLA | IA |
| 2025-07-23 | 515-983-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AMES | IA |
| 2025-07-22 | 515-307-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WILLIAMS | IA |
| 2025-07-22 | 515-315-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BLAIRSBURG | IA |
| 2025-07-22 | 515-320-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ALGONA | IA |
| 2025-07-22 | 515-340-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | WINTERSET | IA |
| 2025-07-22 | 515-347-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | ADEL | IA |
| 2025-07-22 | 515-349-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | DALLAS CTR | IA |
| 2025-07-22 | 515-385-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CLARION | IA |
| 2025-07-22 | 515-405-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RENWICK | IA |
| 2025-07-22 | 515-466-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WHITTEMORE | IA |
| 2025-07-22 | 515-489-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | JEWELL | IA |
| 2025-07-22 | 515-517-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | EARLHAM | IA |
| 2025-07-22 | 515-524-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WEBSTER CY | IA |
| 2025-07-22 | 515-529-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | COLFAX | IA |
| 2025-07-22 | 515-534-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | STUART | IA |
| 2025-07-22 | 515-550-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BRADGATE | IA |
| 2025-07-22 | 515-565-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LIVERMORE | IA |
| 2025-07-22 | 515-588-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | EAGLEGROVE | IA |
| 2025-07-22 | 515-600-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LUVERNE | IA |
| 2025-07-22 | 515-622-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GILMORE CY | IA |
| 2025-07-22 | 515-626-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BOONE | IA |
| 2025-07-22 | 515-642-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PERRY | IA |
| 2025-07-22 | 515-716-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PRAIRIE CY | IA |
| 2025-07-22 | 515-722-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | RUNNELLS | IA |
| 2025-07-22 | 515-755-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WESLEY | IA |
| 2025-07-22 | 515-784-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DAWSON | IA |
| 2025-07-22 | 515-842-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | VAN METER | IA |
| 2025-07-22 | 515-849-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HUMBOLDT | IA |
| 2025-07-22 | 515-877-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | POLK CITY | IA |
| 2025-07-22 | 515-915-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | GRANGER | IA |
| 2021-04-01 | 515-671-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | DES MOINES | IA |
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.