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 321
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-10 | 321-490-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | EAU GALLIE | FL |
| 2025-04-10 | 321-495-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | EAU GALLIE | FL |
| 2025-04-10 | 321-509-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2025-04-10 | 321-509-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2025-04-10 | 321-513-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2025-04-10 | 321-513-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2025-04-10 | 321-515-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2025-04-10 | 321-515-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2025-04-10 | 321-516-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2025-04-10 | 321-516-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2022-09-21 | 321-404-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2022-09-21 | 321-404-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2022-09-21 | 321-447-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2022-09-21 | 321-447-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2022-09-21 | 321-521-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2022-09-21 | 321-521-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2022-09-16 | 321-451-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2022-09-16 | 321-451-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2021-09-03 | 321-366-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2021-07-22 | 321-359-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2021-07-22 | 321-510-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | EAU GALLIE | FL |
| 2021-07-22 | 321-788-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2021-07-22 | 321-966-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2017-11-16 | 321-425-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | EAU GALLIE | FL |
| 2017-11-16 | 321-603-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2017-11-16 | 321-878-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2017-06-08 | 321-349-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2017-06-06 | 321-372-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2017-06-06 | 321-895-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ST CLOUD | FL |
| 2015-02-26 | 321-221-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | WINTERGRDN | FL |
| 2015-02-26 | 321-677-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | WKISSIMMEE | FL |
| 2015-02-26 | 321-805-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ST CLOUD | FL |
| 2015-02-26 | 321-985-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | COCOABEACH | FL |
| 2013-07-30 | 321-203-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WINTERPARK | FL |
| 2013-07-30 | 321-216-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | MELBOURNE | FL |
| 2013-07-30 | 321-241-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | EAU GALLIE | FL |
| 2013-07-30 | 321-529-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | TITUSVILLE | FL |
| 2013-07-29 | 321-302-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | COCOA | FL |
| 2013-07-29 | 321-322-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | APOPKA | FL |
| 2013-02-19 | 321-240-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ORLANDO | FL |
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.