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 415
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-04-07 | 415-729-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SAUSALITO | CA |
| 2021-04-07 | 415-873-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | POINTREYES | CA |
| 2020-11-25 | 415-605-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SNFC CNTRL | CA |
| 2017-01-12 | 415-504-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SNFC MT-EV | CA |
| 2016-08-16 | 415-726-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | SAN RAFAEL | CA |
| 2015-07-24 | 415-985-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NOVATO | CA |
| 2015-04-16 | 415-965-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | STNSN-BLNS | CA |
| 2013-05-29 | 415-767-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | SNFC CNTRL | CA |
| 2010-11-18 | 415-500-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SNFC CNTRL | CA |
| 2009-01-08 | 415-684-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SNFC CNTRL | CA |
| 2003-09-19 | 415-413-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CORTEMADRA | CA |
| 2003-09-19 | 415-413-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CORTEMADRA | CA |
| 2003-09-19 | 415-494-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SNFC JUNPR | CA |
| 2003-09-19 | 415-690-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BELVEDERE | CA |
| 2003-09-19 | 415-690-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BELVEDERE | 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.