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 620
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-09-24 | 620-371-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | DODGE CITY | KS |
| 2012-02-10 | 620-260-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | GARDENCITY | KS |
| 2011-01-13 | 620-400-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | GREAT BEND | KS |
| 2009-04-09 | 620-615-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| 2009-04-09 | 620-615-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | HUTCHINSON | KS |
| 2009-03-04 | 620-240-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | PITTSBURG | KS |
| 2007-05-30 | 620-417-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | LIBERAL | KS |
| 2007-05-30 | 620-417-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | LIBERAL | KS |
| 2004-08-26 | 620-604-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | LIBERAL | KS |
| 2004-08-26 | 620-604-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | LIBERAL | KS |
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.