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 530
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-09-21 | 530-331-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | YREKA | CA |
| 2022-09-21 | 530-331-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | YREKA | CA |
| 2022-09-21 | 530-486-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | STONYFORD | CA |
| 2022-09-21 | 530-486-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | STONYFORD | CA |
| 2022-09-21 | 530-486-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | STONYFORD | CA |
| 2022-09-21 | 530-501-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WILLIAMS | CA |
| 2022-09-21 | 530-502-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | PRINCETON | CA |
| 2022-09-21 | 530-506-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | KNIGHTSLDG | CA |
| 2022-09-21 | 530-535-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ALLEGHANY | CA |
| 2022-09-21 | 530-535-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ALLEGHANY | CA |
| 2022-09-21 | 530-568-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | MT SHASTA | CA |
| 2022-09-21 | 530-568-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MT SHASTA | CA |
| 2022-09-21 | 530-773-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | LOYALTON | CA |
| 2022-09-21 | 530-773-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LOYALTON | CA |
| 2022-09-21 | 530-773-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | LOYALTON | CA |
| 2022-09-21 | 530-793-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PASKENTA | CA |
| 2022-09-21 | 530-861-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | VINA | CA |
| 2022-09-21 | 530-861-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | VINA | CA |
| 2022-09-21 | 530-861-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | VINA | CA |
| 2022-09-21 | 530-948-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MERIDIAN | CA |
| 2022-09-21 | 530-948-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MERIDIAN | CA |
| 2022-09-21 | 530-948-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MERIDIAN | CA |
| 2022-09-21 | 530-962-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SHASTALAKE | CA |
| 2022-05-18 | 530-773-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LOYALTON | CA |
| 2021-09-21 | 530-857-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CHICO | CA |
| 2006-08-28 | 530-420-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ROBBINS | CA |
| 2006-08-28 | 530-422-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CLFX WEMR | CA |
| 2006-08-28 | 530-423-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WEAVERVL | CA |
| 2006-08-28 | 530-618-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HOOPA | CA |
| 2006-08-28 | 530-627-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ORLEANS | CA |
| 2006-08-28 | 530-628-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | HAYFORK | CA |
| 2003-10-09 | 530-264-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NEVADACITY | CA |
| 2003-10-09 | 530-278-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GRVY SOUTH | CA |
| 2003-10-09 | 530-292-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | NOSAN JUAN | CA |
| 2003-10-09 | 530-350-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SHINGLESPG | CA |
| 2003-10-09 | 530-453-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | NICOLAUS | CA |
| 2003-10-09 | 530-580-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NTAH THCY | CA |
| 2003-10-09 | 530-695-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | LIVE OAK | CA |
| 2003-10-09 | 530-862-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | DOWNIEVL | CA |
| 2003-10-08 | 530-269-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | AUBN NORTH | CA |
| 2003-10-08 | 530-334-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GEORGETOWN | CA |
| 2003-10-08 | 530-456-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | GRIDLEY | CA |
| 2003-10-08 | 530-633-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | WHEATLAND | CA |
| 2003-09-23 | 530-480-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BLAIRSDEN | CA |
| 2003-09-22 | 530-359-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | FRENCHGLCH | CA |
| 2003-09-22 | 530-385-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GERBER | CA |
| 2003-09-22 | 530-430-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SIERRAVL | CA |
| 2003-09-22 | 530-431-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | RICHVALE | CA |
| 2003-09-22 | 530-435-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GAZELLE | CA |
| 2003-09-22 | 530-436-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GRENADA | CA |
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.