NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026
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 509
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-10-12 | 509-433-3XXX | 3000–3999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | WENATCHEE | WA |
| 2015-10-12 | 509-436-3XXX | 3000–3999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | WENATCHEE | WA |
| 2015-10-12 | 509-436-4XXX | 4000–4999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | WENATCHEE | WA |
| 2015-10-12 | 509-436-5XXX | 5000–5999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | WENATCHEE | WA |
| 2015-10-12 | 509-436-6XXX | 6000–6999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | WENATCHEE | WA |
| 2013-08-07 | 509-221-2XXX | 2000–2999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2013-08-07 | 509-221-3XXX | 3000–3999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2013-08-07 | 509-221-4XXX | 4000–4999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2013-08-07 | 509-221-5XXX | 5000–5999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2013-08-07 | 509-221-6XXX | 6000–6999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2013-08-07 | 509-221-7XXX | 7000–7999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | KENNEWICK | WA |
| 2004-11-16 | 509-371-6XXX | 6000–6999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | RICHLAND | WA |
| 2004-11-16 | 509-371-7XXX | 7000–7999 | Assigned | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4324 | RICHLAND | WA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.