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 424
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-11-07 | 424-369-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | W ANGELES | CA |
| 2017-11-06 | 424-403-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CMTN CMTN | CA |
| 2017-11-06 | 424-532-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CULVERCITY | CA |
| 2016-12-06 | 424-377-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | AVALON | CA |
| 2015-10-07 | 424-367-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | EL SEGUNDO | CA |
| 2015-09-29 | 424-395-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MALIBU | CA |
| 2015-09-22 | 424-316-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SNMN SNMN | CA |
| 2015-09-22 | 424-340-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CMTN GRDN | CA |
| 2015-09-22 | 424-386-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | BEVERLYHLS | CA |
| 2015-08-20 | 424-369-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | W ANGELES | CA |
| 2015-08-20 | 424-392-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | REDONDO | CA |
| 2015-08-20 | 424-395-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MALIBU | CA |
| 2015-07-24 | 424-389-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BEVERLYHLS | CA |
| 2015-07-16 | 424-536-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SAN PEDRO | CA |
| 2015-07-16 | 424-536-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SAN PEDRO | CA |
| 2015-07-01 | 424-398-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | REDONDO | CA |
| 2015-07-01 | 424-398-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | REDONDO | CA |
| 2015-06-09 | 424-369-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | W ANGELES | CA |
| 2015-06-09 | 424-375-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CMTN GRDN | CA |
| 2015-06-09 | 424-384-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SNMN MRVS | CA |
| 2015-04-27 | 424-356-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | INGLEWOOD | CA |
| 2015-04-27 | 424-387-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SNMN SNMN | CA |
| 2014-04-28 | 424-302-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | BEVERLYHLS | CA |
| 2014-02-05 | 424-337-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | TORRANCE | CA |
| 2013-08-01 | 424-296-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CMTN CMTN | CA |
| 2013-03-15 | 424-292-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CMTN GRDN | CA |
| 2009-09-10 | 424-250-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | LOMITA | CA |
| 2009-01-26 | 424-646-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | INGLEWOOD | CA |
| 2006-08-15 | 424-456-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HAWTHORNE | CA |
| 2006-08-15 | 424-456-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HAWTHORNE | CA |
| 2006-08-15 | 424-672-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CULVERCITY | CA |
| 2006-08-15 | 424-672-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CULVERCITY | 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.