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 321
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-11-06 | 321-401-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | WKISSIMMEE | FL |
| 2014-01-02 | 321-413-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | EASTORANGE | FL |
| 2013-05-08 | 321-240-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | ORLANDO | FL |
| 2012-02-21 | 321-270-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | ORLANDO | FL |
| 2008-09-25 | 321-329-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | REEDYCREEK | FL |
| 2007-05-03 | 321-396-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | APOPKA | FL |
| 2007-05-03 | 321-401-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | WKISSIMMEE | FL |
| 2007-05-03 | 321-682-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | KISSIMMEE | FL |
| 2007-05-03 | 321-895-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | ST CLOUD | FL |
| 2007-04-12 | 321-295-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | WINTERPARK | FL |
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.