NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 223
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-01-25 | 223-228-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CHAMBERSBG | PA |
| 2022-01-25 | 223-241-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LEBANON | PA |
| 2022-01-25 | 223-269-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CARLISLE | PA |
| 2022-01-25 | 223-877-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | YORK | PA |
| 2021-07-19 | 223-266-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LANCASTER | PA |
| 2021-02-08 | 223-259-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HARISBGZN1 | PA |
| 2020-04-28 | 223-228-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CHAMBERSBG | PA |
| 2020-04-28 | 223-228-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CHAMBERSBG | PA |
| 2020-04-28 | 223-229-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LEBANON | PA |
| 2020-04-28 | 223-229-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LEBANON | PA |
| 2020-04-28 | 223-231-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HARISBGZN1 | PA |
| 2020-04-28 | 223-231-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HARISBGZN1 | PA |
| 2020-04-28 | 223-232-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | YORK | PA |
| 2020-04-28 | 223-232-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | YORK | PA |
| 2017-11-20 | 223-888-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HALIFAX | PA |
| 2017-11-16 | 223-333-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LEBANON | PA |
| 2017-11-16 | 223-333-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LEBANON | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.