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 928
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-11-15 | 928-294-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2016-11-28 | 928-256-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2016-05-12 | 928-236-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SOMERTON | AZ |
| 2015-11-19 | 928-955-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2014-11-19 | 928-318-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2014-11-07 | 928-318-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2014-04-08 | 928-259-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2012-01-19 | 928-248-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2012-01-10 | 928-366-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2011-12-06 | 928-315-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SOMERTON | AZ |
| 2011-11-28 | 928-248-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2011-01-20 | 928-919-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2010-01-08 | 928-247-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2008-11-10 | 928-276-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2007-12-12 | 928-276-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2006-08-08 | 928-276-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | YUMA | AZ |
| 2006-07-28 | 928-550-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SOMERTON | AZ |
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.