NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026
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 661
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-04-16 | 661-642-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | DELANO | CA |
| 2026-04-16 | 661-642-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | DELANO | CA |
| 2026-04-16 | 661-642-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | DELANO | CA |
| 2026-04-16 | 661-642-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | DELANO | CA |
| 2026-04-15 | 661-681-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | BKFD NORTH | CA |
| 2026-04-15 | 661-681-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | BKFD NORTH | CA |
| 2026-04-15 | 661-681-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | BKFD NORTH | CA |
| 2024-07-01 | 661-640-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | BKFD NORTH | CA |
| 2024-07-01 | 661-640-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | BKFD NORTH | CA |
| 2020-09-30 | 661-516-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | BKFD MAIN | CA |
| 2020-09-30 | 661-516-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | BKFD MAIN | CA |
| 2016-08-04 | 661-306-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | LAKEHUGHES | CA |
| 2016-05-18 | 661-338-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | LAKEHUGHES | CA |
| 2016-05-18 | 661-464-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | LAKEHUGHES | CA |
| 2016-05-18 | 661-464-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | LAKEHUGHES | CA |
| 2016-05-18 | 661-464-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | LAKEHUGHES | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.