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 315
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-07-18 | 315-588-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | ALEXNDRIBY | NY |
| 2024-07-17 | 315-557-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CLINTON | NY |
| 2024-07-17 | 315-582-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | GOUVERNEUR | NY |
| 2024-07-17 | 315-613-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DOLGEVILLE | NY |
| 2024-07-17 | 315-618-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LITTLE FLS | NY |
| 2024-07-17 | 315-631-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CAMILLUS | NY |
| 2024-07-17 | 315-645-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | COPENHAGEN | NY |
| 2024-07-17 | 315-650-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CLAYTON | NY |
| 2024-07-17 | 315-716-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GENEVA | NY |
| 2024-07-17 | 315-803-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LA FARGEVL | NY |
| 2024-07-17 | 315-919-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LYONS | NY |
| 2024-07-17 | 315-974-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CAMDEN | NY |
| 2024-07-17 | 315-989-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | NORFOLK | NY |
| 2024-07-17 | 315-990-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | HEUVELTON | NY |
| 2021-10-29 | 315-375-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MORRISTOWN | NY |
| 2021-10-29 | 315-616-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | STAR LAKE | NY |
| 2021-10-25 | 315-981-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | OSCEOLA | NY |
| 2021-10-25 | 315-989-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | NORFOLK | NY |
| 2021-10-21 | 315-512-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HARRISVL | NY |
| 2021-10-20 | 315-588-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ALEXNDRIBY | NY |
| 2021-10-20 | 315-590-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MADRID | NY |
| 2021-10-20 | 315-990-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | HEUVELTON | NY |
| 2021-10-12 | 315-584-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MARION | NY |
| 2021-10-11 | 315-293-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WOLCOTT | NY |
| 2021-10-11 | 315-650-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CLAYTON | NY |
| 2021-10-11 | 315-696-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | TULLY | NY |
| 2021-10-11 | 315-881-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | MORAVIA | NY |
| 2021-10-11 | 315-977-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | RICHFLDSPG | NY |
| 2021-10-11 | 315-994-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | POPLAR RDG | NY |
| 2021-10-08 | 315-630-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HAMILTON | NY |
| 2021-10-08 | 315-631-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CAMILLUS | NY |
| 2021-10-07 | 315-556-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LITTLE FLS | NY |
| 2021-10-07 | 315-582-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | GOUVERNEUR | NY |
| 2021-10-07 | 315-835-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WATERLOO | NY |
| 2021-10-07 | 315-919-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LYONS | NY |
| 2021-09-29 | 315-270-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | PENN YAN | NY |
| 2021-09-29 | 315-614-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | OGDENSBURG | NY |
| 2021-09-28 | 315-615-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ONEIDA | NY |
| 2021-09-28 | 315-620-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | GENEVA | NY |
| 2021-09-28 | 315-621-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | POTSDAM | NY |
| 2021-09-28 | 315-643-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MASSENA | NY |
| 2021-09-28 | 315-753-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BALDWINSVL | NY |
| 2020-12-09 | 315-349-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | OSWEGO | NY |
| 2020-05-13 | 315-207-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | OSWEGO | NY |
| 2020-05-13 | 315-275-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | UTICA | NY |
| 2020-05-13 | 315-702-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | AUBURN | NY |
| 2017-01-20 | 315-602-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | OSWEGO | NY |
| 2017-01-20 | 315-916-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | AUBURN | NY |
| 2016-11-23 | 315-258-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | AUBURN | NY |
| 2013-12-17 | 315-258-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AUBURN | NY |
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.