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 501
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-09 | 501-800-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | PALARM | AR |
| 2022-02-24 | 501-535-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BALD KNOB | AR |
| 2022-02-16 | 501-667-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | KENSETT | AR |
| 2022-02-15 | 501-782-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | GRIFFITHVL | AR |
| 2022-02-15 | 501-942-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | SCOTT | AR |
| 2022-02-14 | 501-427-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | MAUMELLE | AR |
| 2022-02-14 | 501-468-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CLEVELAND | AR |
| 2022-02-14 | 501-727-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | MORRILTON | AR |
| 2022-02-07 | 501-746-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BRYANTCGVL | AR |
| 2022-01-13 | 501-832-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | GREERSFRRY | AR |
| 2022-01-13 | 501-866-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CASA | AR |
| 2021-09-01 | 501-466-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | COY | AR |
| 2021-04-20 | 501-640-1XXX | 1000–1999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | LITTLEROCK | AR |
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.