NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 516
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-09-03 | 516-919-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2021-09-02 | 516-452-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2021-09-02 | 516-878-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN07 | NY |
| 2021-09-02 | 516-894-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2021-09-02 | 516-907-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN05 | NY |
| 2020-12-08 | 516-550-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN01 | NY |
| 2020-12-08 | 516-774-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN06 | NY |
| 2020-12-08 | 516-786-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN03 | NY |
| 2020-12-08 | 516-862-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN08 | NY |
| 2020-05-06 | 516-299-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2020-05-06 | 516-788-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2020-05-06 | 516-789-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2017-06-15 | 516-208-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN06 | NY |
| 2017-06-15 | 516-266-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2017-01-27 | 516-266-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2017-01-27 | 516-600-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN06 | NY |
| 2015-02-25 | 516-447-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN07 | NY |
| 2014-11-05 | 516-274-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN05 | NY |
| 2013-12-25 | 516-441-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN01 | NY |
| 2013-12-25 | 516-514-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2013-08-06 | 516-243-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN05 | NY |
| 2013-07-30 | 516-206-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN06 | NY |
| 2013-07-30 | 516-231-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2013-07-30 | 516-725-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2013-07-30 | 516-823-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN03 | NY |
| 2013-03-27 | 516-321-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN01 | NY |
| 2013-03-18 | 516-590-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN09 | NY |
| 2013-03-18 | 516-595-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN08 | NY |
| 2012-11-14 | 516-370-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2012-11-14 | 516-370-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2012-11-14 | 516-370-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2010-12-21 | 516-325-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN02 | NY |
| 2010-12-21 | 516-331-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN01 | NY |
| 2010-12-21 | 516-341-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN03 | NY |
| 2010-12-21 | 516-362-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN06 | NY |
| 2010-12-21 | 516-409-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN09 | NY |
| 2010-12-21 | 516-723-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2010-12-21 | 516-828-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN08 | NY |
| 2010-12-21 | 516-882-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN09 | NY |
| 2007-08-13 | 516-300-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN01 | NY |
| 2003-07-16 | 516-882-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN09 | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.