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 916
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-09-23 | 916-465-7XXX | 7000–7999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2016-09-23 | 916-465-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2016-09-23 | 916-886-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2016-09-23 | 916-886-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2016-03-31 | 916-655-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | PLEASATGRV | CA |
| 2016-01-22 | 916-738-7XXX | 7000–7999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2014-03-19 | 916-789-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2013-11-13 | 916-389-7XXX | 7000–7999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2013-09-23 | 916-846-7XXX | 7000–7999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2013-09-19 | 916-292-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | FOLSOM | CA |
| 2013-01-07 | 916-732-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2012-10-19 | 916-426-1XXX | 1000–1999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2012-10-19 | 916-462-6XXX | 6000–6999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2012-10-19 | 916-462-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2012-06-15 | 916-560-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL CTHT | CA |
| 2012-02-10 | 916-253-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | LINCOLN | CA |
| 2011-03-30 | 916-842-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2010-11-09 | 916-742-1XXX | 1000–1999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2010-11-03 | 916-822-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2010-06-09 | 916-242-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL CTHT | CA |
| 2010-06-09 | 916-287-9XXX | 9000–9999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2010-06-09 | 916-569-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2010-06-09 | 916-824-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SO PLACER | CA |
| 2010-06-09 | 916-896-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | ELK GROVE | CA |
| 2010-05-27 | 916-625-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SO PLACER | CA |
| 2010-04-13 | 916-409-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | LINCOLN | CA |
| 2010-04-13 | 916-740-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2010-01-25 | 916-544-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | ELK GROVE | CA |
| 2009-12-31 | 916-735-7XXX | 7000–7999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL CTHT | CA |
| 2009-04-07 | 916-740-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2009-04-07 | 916-740-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2009-02-17 | 916-585-9XXX | 9000–9999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | ELK GROVE | CA |
| 2009-02-04 | 916-735-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL CTHT | CA |
| 2008-11-05 | 916-550-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2008-06-11 | 916-872-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2008-06-11 | 916-872-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2008-06-11 | 916-993-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2007-07-20 | 916-468-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RIO LINDA | CA |
| 2007-07-02 | 916-737-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2007-01-23 | 916-333-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2007-01-11 | 916-864-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | FAIR OAKS | CA |
| 2007-01-09 | 916-897-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | ELK GROVE | CA |
| 2007-01-09 | 916-934-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | FOLSOM | CA |
| 2006-02-07 | 916-265-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2006-02-07 | 916-440-6XXX | 6000–6999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM MAIN | CA |
| 2006-02-07 | 916-644-1XXX | 1000–1999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | LINCOLN | CA |
| 2006-02-07 | 916-647-6XXX | 6000–6999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | ELK GROVE | CA |
| 2006-01-27 | 916-408-6XXX | 6000–6999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | LINCOLN | CA |
| 2005-11-16 | 916-735-9XXX | 9000–9999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL CTHT | CA |
| 2005-10-31 | 916-672-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SO PLACER | CA |
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.