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 253
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-02-27 | 253-294-2XXX | 2000–2999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | AUBURN | WA |
| 2018-03-19 | 253-501-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | SUMNER | WA |
| 2017-11-03 | 253-373-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | KENT | WA |
| 2017-04-26 | 253-240-2XXX | 2000–2999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | TACOMA | WA |
| 2017-04-26 | 253-387-0XXX | 0000–0999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | PUYALLUP | WA |
| 2012-04-06 | 253-303-4XXX | 4000–4999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | GIG HARBOR | WA |
| 2009-09-16 | 253-509-9XXX | 9000–9999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | GIG HARBOR | WA |
| 2005-06-20 | 253-514-4XXX | 4000–4999 | Assigned | ASTOUND BROADBAND, LLC - WA | 937F | GIG HARBOR | WA |
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.